Ladder Communication Modules

Transcription

1 Instruction Manual Ladder Communication Modules Yokogawa Electric Corporation 1st Edition

2 <Toc> <Ind> <Rev> <Introduction> i Preface Applicable Products FA-M3 Range-free Multi-controller Models and Their Names: F3RZ81-0N Ladder Communication Module F3RZ91-0N Ladder Communication Module December, 1998 Revision History December, 1998: 1st edition - New publication Notices (1) This manual should be passed on to the end user. (2) Yokogawa Electric Corporation (hereinafter simply referred to as Yokogawa) does not warrant that the functions contained in this product will suit a particular purpose of the user. (3) Under absolutely no circumstances may the contents of this manual in part or in whole be transcribed or copied without permission. (4) The contents of this manual are subject to change without prior notice. (5) Every effort has been made to ensure accuracy in the preparation of this manual. However, should any errors or omissions come to the attention of the user, please contact your nearest Yokogawa representative or our sales office. (6) In the interest of protecting and ensuring the safety of this product and the system which is controlled by this product, ensure that all instructions and precautions in this manual relating to safety are adhered to in the use of this product. If separate protection and/or safety circuits are installed for this product or the system which is controlled by this product, ensure that such circuits are installed external to the product. Do not attempt to make modifications or additions internal to the product. (7) In cases where the use of this product results in damage or loss to the user or a third party, Yokogawa will not be responsible for any incidental or consequential damage or loss, or any damage or loss suffered by the user or third party resulting from a defect or defects in this product which could not be foreseen by Yokogawa. (8) Concerning the software supplied by Yokogawa on floppy disks: 1. This software is to be used only on one specific computer. If it is to be used on other computers as well, purchase that software separately. 2. The copying of this software for any purpose except backup is strictly prohibited. 3. Keep the floppy disks (originals) of this software in a safe place. If the original floppy disks are not in the user's possession, Yokogawa may decline to provide quality assurance and maintenance services. 4. The decompiling or reverse-assembly of this software ("reverse engineering") is strictly prohibited. Media No. (CD) 1st Edition : Dec (YK) All Rights Reserved Copyright 1998, Yokogawa Electric Corporation

3 <Toc> <Ind> <Rev> <Introduction> ii The document number and document model code for this manual are as follows: Document number: Document model code: DOCIM Please refer to the document number in all communications; refer to the document number or document model code when purchasing additional manuals.

4 <Toc> <Ind> <Rev> <Introduction> iii Introduction The FA-M3 controllers incorporate a new concept developed by Yokogawa which specializes in measurement, control and information processing. This instruction manual, "Ladder Communication Modules," explains the specifications and handling of the ladder communication modules used with an FA-M3 controller. Operating Environment FA-M3 The CPU modules with which the ladder communication modules covered in this manual can be used are F3SP20, F3SP21, F3SP25, F3SP30 and F3SP35 modules.

5 <Toc> <Ind> <Rev> Safety Precautions <Introduction> iv This instrument is an IEC safety class I instrument (provided with terminal for protective grounding). The following general safety precautions must be observed during all phases of operation, service and repair of this instrument. If this instrument is used in a manner not specified in this manual, the protection provided by this instrument may be impaired. Also, Yokogawa Electric Corporation assumes no liability for the customer s failure to comply with these requirements. The following symbols are used on this instrument. CAUTION To avoid injury, death of personnel or damage to the instrument, the operator must refer to an explanation in the Instruction Manual. Protective grounding terminal. Function grounding terminal. This terminal should not be used as a Protective grounding terminal. Alternating current Direct current Make sure to comply with the following safety precautions. Not complying might result in injury, death of personnel or damage to the instrument. WARNING Power Supply Ensure the source voltage matches the voltage of the power supply before turning ON the power. Protective Grounding Make sure to connect the protective grounding to prevent an electric shock before turning ON the power. Necessity of Protective Grounding Never cut off the internal or external protective grounding wire or disconnect the wiring of protective grounding terminal. Doing so poses a potential shock hazard. Defect of Protective Grounding and Fuse Do not operate the instrument when protective grounding or fuse might be defective.

6 <Toc> <Ind> <Rev> <Introduction> v Do not Operate in an Explosive Atmosphere. Do not operate the instrument in the presence of flammable liquids or vapors. Operation of any electrical instrument in such an environment constitutes a safety hazard. Waste Electrical and Electronic Equipment Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC (This directive is only valid in the EU.) This product complies with the WEEE Directive (2002/96/EC) marking requirement. The following marking indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category With reference to the equipment types in the WEEE directive Annex 1, this product is classified as a Monitoring and Control instrumentation product. Do not dispose in domestic household waste. When disposing products in the EU, contact your local Yokogawa Europe B. V. office.

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8 <Int> <Ind> <Rev> Toc-1 FA-M3 Ladder Communication Modules 1st Edition CONTENTS Preface...i Introduction... iii 1. Overview Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules Overview F3RZ81-0N Ladder Communication Module Standard Specifications Components and Their Functions External Dimensions External Wiring F3RZ91-0N Ladder Communication Module Standard Specifications Components and Their Functions External Dimensions External Wiring Attaching and Detaching Modules Attaching Modules Detaching Modules Attaching Modules in Intense Vibration Environments Using the Ladder Communication Module Types of Relay and Register Types of relay Types of register Access Methods Mode Setting Sequence Control Register Reference Sequence Send Sequence Receive Sequence Multipoint Connections Response Status Appendix 1. Meaning of Signals and Movement of Signal Lines (RS-232-C)...Appx. 1-1 Appendix 2. Data Transmission...Appx. 2-1 Appendix 3. ASCII Codes...Appx. 3-1

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10 <Toc> <Ind> <1. Overview > Overview F3RZ81-0N is a communication module having one RS-232-C port, and F3RZ91-0N module is a communication module having one RS-422-A/RS-485 port. Both modules are installed in an FA-M3 controller. Table 1.1 Types of Ladder Communication Module Model Description Applicable Controller F3RZ81-0N Ladder communication module FA-M3 F3RZ91-0N Ladder communication module

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12 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules 2.1 Overview F3RZ81-0N is a communication module having one RS-232-C port, while F3RZ91-0N module is a communication module having one RS-422-A/RS-485 port. For details on the difference between RS-422-A and RS-485 interfaces, see Sections and 3.2.5, "Standard Specifications" and "Multipoint Connections," later in this manual.

13 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > 2.2 F3RZ81-0N Ladder Communication Module Standard Specifications Table 2.1 Physical Specifications Item Specifications Electrical specifications Conforms to EIA RS-232-C standards. Number of communication ports 1 (non-isolated) Transmission distance 15 m max. Connector D-Sub 9-pin (female) Current consumption 110 ma (5 V DC) Dimensions 28.9 (W) 100 (H) 83.2 (D)(mm) Weight 120g Table 2.2 Function Specifications (first of two) Item Specifications Default Connection Point-to-point - Communication mode Full-duplex/half-duplex - Synchronization Start-stop - Protocol No protocol - Character length 7/8 bits 8 bits Character frame Stop bit length 1/1.5/2 bits 1 bit Parity bit None/odd/even Even Transmission rate 75/150/300/600/1200/2400/4800/9600/ Control/checking of control line Communication buffer RS control DR check CD check ER control (1) Always on (2) On only when a message is being sent (1) Transmits regardless of the state of DR. (2) Transmits only when DR is on. (1) Transmits regardless of the state of CD. (2) Transmits only when CD is off. (1) On (ready) (2) Off (not ready) Can buffer one text (maximum length of 598 Transmitting buffer - bytes). Receiving buffer Rotary (FIFO) buffer of 2,048 bytes - (1) (1) (1) On

14 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > 2-3 Table 2.2 Receive text format XON/XOFF control Function Specifications (second of two) Item Specifications Default Starting character Ending character (Terminator) Designation of number of characters Monitored character-tocharacter time interval Control method XON character XOFF character Monitored time before I/O completion I/O monitoring Monitored time before transmission start Break transmission interval Yes/no One-character length; any character is acceptable Yes/no Two-character length maximum; any character (string) is acceptable Also serves as an ending character during transmission. Yes Effective range: 1 to 1024 (over the communication line) Configurable in 1-ms units; accuracy: 10 ms Effective range: 0 to (if set to 0, there is no monitoring of the character-to-character time interval) (1) Uncontrolled (2) Receiving line only (3) Transmission line only (4) Both transmission and receiving lines One-character length; any character is acceptable Configurable in 1-ms units from 1 to ms; accuracy: 10 ms Time not monitored/time monitored (configurable in 1-ms units from 1 to ms; accuracy: 10 ms) Configurable in 1-ms units from 1 to ms; accuracy: 10 ms No $0D $0A (CR-LF) s Uncontrolled $11(DC1) $13(DC3) 30 s Time not monitored 400 ms End of receiving Interruption permitted/prohibited Prohibited Interruption mask Receive failure Interruption permitted/prohibited Prohibited Break receiving Interruption permitted/prohibited Prohibited

15 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > Components and Their Functions RDY RZ81-0N RS232 READY indicator (lit steady in green when the internal circuitry is in normal operation) External Dimensions (Unit: mm) 100 Note: For reasons of the size of a base module's connector and an RS-232-C connector and the bend radius of an RS-232-C cable, add 90 mm to this nearly 83-mm depth across the bottom of the module to allow approximately 173 mm as the depth when the cable is connected to the module.

16 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > External Wiring Connector Pin Assignments The following figure shows how the module's connector looks when viewed externally D-Sub 9-pin Connector (Female) (1)Directly Connecting to an RS-232-C Device (DTE: Data Terminal Equipment) Null-modem cable Pin no. Connector cover Shielding wire Pin no. Connector cover 1 (FG) (SD) 3 2 (SD) (RD) 2 3 (RD) F3RZ81-0N (D-Sub 9-pin) (RS) 7 (CS) 8 (DR) 6 4 (RS) 5 (CS) 6 (DR) Counterpart DTE (D-Sub 9-pin) (SG) 5 7 (SG) (CD) 1 8 (CD) (ER) 4 20 (ER) Connect the shielding wire as instructed below: (1) Use a cable with connectors housed in metal or metal-plated covers. Connect the shielding wire directly to the connector covers. (2) Note that the connector shell of an F3RZ81-0N module is connected internally to the FG (frame ground) terminal of an FA-M3 power supply module.

17 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > Introduction of Yokogawa-Supplied Cables Yokogawa is also prepared to supply null modem cables. The model codes, specifications and wiring diagrams of these cables are as summarized below: Model and Suffix Codes Model Code Suffix Code Specifications YCB KM01 KM05 KM15 YCB KM01 KM05 KM15 RS-232-C null modem cable (with control line) with 9- and 25- pin connectors 1 m long 5 m long 15 m long RS-232-C null modem cable (without control line) with 9- and 25-pin connectors 1 m long 5 m long 15 m long Diagrams of Internal Cable Connections YCB215 cable CN1 side (FA-M3) Pin no. Connector cover SD RD RS CS DR SG CD ER Shielding wire FG SD RD RS CS DR SG CD ER CN2 side Pin no. Connector cover YCB216 cable CN1 side (FA-M3) Pin no. Connector cover SD RD RS CS DR SG CD ER Shielding wire FG SD RD SG CN2 side Pin no. Connector cover

18 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > 2-7 (2) Connecting to a Modem (DCE: Data Communication Equipment) Modem cable Pin No. Connector cover (SD) 3 (RD) 2 (RS) 7 F3RZ81-0N (CS) 8 (DR) 6 (SG) 5 (CD) 1 (ER) 4 Pin No. Connector cover 1 (FG) 2 (SD) 3 (RD) 4 (RS) 5 (CS) 6 (DR) 7 (SG) 8 (CD) 20 (ER) Counterpart DCE Connect the shielding wire as instructed below: (1) Use a cable with connectors housed in metal or metal-plated covers. Connect the shielding wire directly to the connector covers. (2) Note that the connector shell of an F3RZ81-0N module is connected internally to the FG (frame ground) terminal of an FA-M3 power supply module. - Introduction of Yokogawa-Supplied Cables Yokogawa is also prepared to supply modem cables. The model code, specifications and wiring diagram of the cable are as summarized below: Model and Suffix Codes Model Code Suffix Code Specifications YCB RS-232-C modem cable with 9- and 25-pin connectors KM01 KM05 KM15 1 m long 5 m long 15 m long Diagram of Internal Cable Connection CN1 side (FA-M3) Pin No. Connector cover SD RD RS CS DR SG CD ER CI Shielding wire FG SD RD RS CS DR SG CD ER CI CN2 side Pin No. Connector cover

19 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > 2-8 Notes on Wiring The connector shell of an F3RZ81-0N module is connected internally to the FG terminal of an FA-M3 power supply module. (1) When connecting an F3RZ81-0N module via a modem: The module should be no more than 5 m away from the modem. (2) When connecting an F3RZ81-0N module without routing via a modem: Ground the module along with the counterpart equipment. FA-M3 controller Counterpart equipment FG JIS Class 3 grounding (grounding resistance of 100 Ω or less)

20 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > F3RZ91-0N Ladder Communication Module Standard Specifications Table 2.3 Physical Specifications Item Electrical specifications Number of communication ports Maximum number of connectable drivers/receivers Transmission distance Connector Current consumption Dimensions Weight Specifications Conforms to EIA RS-422-A/EIA RS-485 standards. 1 (isolated) RS-422-A RS driver 32 drivers 10 receivers 32 receivers 1200 m max. Six-pole terminal block with 3.5-mm screws 210 ma (5 V DC) 28.9 (W) 100 (H) 83.2 (D) (mm) 110 g Table 2.4 Function Specifications (first of two) Item Specifications Default Connection Point-to-point - Communication mode Full-duplex/half-duplex - Synchronization Start-stop - Protocol No protocol - Character length 7/8 bits 8 bits Character frame Stop bit length 1/1.5/2 bits 1 bit Parity bit None/odd/even Even Transmission rate 75/150/300/600/1200/2400/4800/9600/19200 bps 4800 Communication buffer Transmitting buffer Can buffer one text (maximum length of 598 bytes). Receiving buffer Rotary (FIFO) buffer of 2,048 bytes - - Receive text format Starting character Yes/no One-character length; any character is acceptable Ending character (Terminator) Designation of number of characters Monitored character-tocharacter time interval Yes/no Two-character length maximum; any character (string) is acceptable Also serves as an ending character during transmission. Yes Effective range: 1 to 1024 (over the communication line) Configurable in 1-ms units; accuracy: 10 ms Effective range: 0 to (if set to 0, there is no monitoring of the character-to-character time interval) No $0D $0A (CR-LF) s

21 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > 2-10 Table 2.4 Function Specifications (second of two) Item Specifications Default Control method X ON /X OFF control X ON character X OFF character Monitored time before I/O completion Break transmission interval (1) Uncontrolled (2) Receiving line only (3) Transmission line only (4) Both transmission and receiving lines One-character length; any character acceptable Configurable in 1-ms units from 1 to ms; accuracy: 10 ms Configurable in 1-ms units from 1 to ms; accuracy: 10 ms Uncontrolled $11 (DC1) $13 (DC3) 30 s 400 ms End of receiving Interruption permitted/prohibited Prohibited Interruption mask Receive failure Interruption permitted/prohibited Prohibited Break receiving Interruption permitted/prohibited Prohibited

22 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > Components and Their Functions RDY RZ91-0N RS422 READY indicator : (lit steady in green when the internal circuitry is in normal operation) TERMINATOR 2-4-WIRE OFF SD A Terminating resistor selector switch: When the module is terminal in the line, use this switch to select either "4-WIRE" or "2-WIRE." SD B RD A RD B SG RS-422/RS-485 terminal block (Six terminals with 3.5 mm screws) SHIELD External Dimensions (Unit: mm)

23 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > External Wiring (1)Four-Wire System This subsection explains the point-to-point wiring methods. Before the communication module can be wired using a two-wire system, the register must be configured. F3RZ91-0N module's port terminals Counterpart equipment SDA (SD A) SD A Terminating resistor (built-in) SDB RDA (SD B) (RD A) SD RD B A Terminating resistor SG RDB SHIELD (RD B) (SG) RD B SG SHIELD Place the terminating resistor selector switch in the 4-WIRE position. (2)Two-Wire System Terminating resistor (built-in) F3RZ91-0N module's port terminals SDA SDB RDA (A) (B) Counterpart equipment A B Terminating resistor RDB SG SHIELD (SG) SG SHIELD Place the terminating resistor selector switch in the 2-WIRE position. *1 Ground the shielding wire of the twisted-pair cable at both ends of the line (that is, connect the wire to the SHIELD or FG terminals). Note that the SHIELD terminal of the F3RZ91-0N module is connected internally to the FG terminal of an FA-M3 power supply module. *2 A terminating resistor (220 ) is built in the terminal block of the F3RZ91-0N module. Use the terminating resistor selector switch to select either the 4-wire system (4-WIRE) or the 2-wire system (2-WIRE). Note: Some counterpart equipment may have reverse signal polarities (A/B representations), although this is extremely rare. In that case, a framing error or other failure mode will result even if the communication module is connected correctly. If such a failure occurs, reverse the polarities of the connection.

24 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > 2-13 RS-422-A/RS-485 Terminal Block SD A SD A Send data A 3.5-mm screw SD B RD A RD B SD B RD A RD B Send data B Receive data A Receive data B 7.3mm 8.6mm SG SG Signal ground SHIELD SHIELD Shield terminal Applicable wire Wiring method Crimp-on terminal Connection Crimp-on terminal Tightening torque Applicable crimpon terminal Terminal block Size: 0.5 to 1.25 mm 2 thick AWG-20 to -16 shielded twisted-pair wiring is recommended. Example: CO-SPEV-SB (A) 3P 0.5 SQ from Hitachi Cable, Limited. Crimp-on For 3.5-mm size 78 N cm (8 kgf cm) maximum Example: V1.25-M3 from J.S.T. Manufacturing Co., Lid. RAV from Nippon Tanshi Co., Lid. CAUTION When connecting a terminal lug to the wire, be sure to use an appropriate crimping tool specified by the manufacturer.

25 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > 2.4 Attaching and Detaching Modules Attaching Modules Figure 2.1 shows how to attach this module to the base module. First hook the anchor slot at the bottom of the module to be attached onto the anchor pin on the bottom of the base module. Push the top of this module in the direction of the arrow shown in the figure (toward the base module) until the yellow, spring-loaded anchor/release button clicks into place. Base module Top button PUSH This module Figure 2.1Attaching Modules CAUTION DO NOT bend the connector on the rear of the module by force during the above operation. If the module is forcibly pushed with an improper connection, the connector may bend and this damage will cause a module installation error during the self-diagnosis Detaching Modules To remove this module from the base module, reverse the above operation by pressing the yellow anchor/release button to unlock it, and tilting the module away from the base module. Then lift the module off of the anchor pin at the base.

26 <Toc> <Ind> <2. Functionality and Operation of F3RZ81-0N and F3RZ91-0N Modules > Attaching Modules in Intense Vibration Environments If the modules are used in intense vibration environments, fasten the modules with a screw directly beneath the yellow anchor/release button, as shown in Figure 2.2. For this, use a 12-mm long M4 (4-mm thick) binder screw. With a Phillips screwdriver, tighten the upper side of the module with this screw. During this operation, the user must tilt the screwdriver somewhat using the guide channel at the top of the module. A clearance of approximately 80 mm between the module and the duct above it is necessary to allow the screwdriver to access the screw. CAUTION DO NOT overtighten the module fixing screw. Figure 2.2 Tightening Module

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28 <Toc> <Ind> <3. Using the Ladder Communication Module > Using the Ladder Communication Module 3.1 Types of Relay and Register Types of relay There are 2 types of relay, namely, input and output. They maintain timing for the 3 types of access sequence shown below. Input relay Output relay Mode set sequence Input relay: 3 Output relay: 35 End-of-Setting relay Start-of-Setting relay Send sequence Input relay: 2 Output relay: 34 End-of-Sending relay Start-of-Sending relay Receive sequence Input relay: 1 Output relay: 33 End-of-Receiving relay Start-of-Reading relay

29 <Toc> <Ind> <3. Using the Ladder Communication Module > Types of register There are 3 types of register, namely, input, output and mode. They are used according to each of the access sequences. (Data position) 1 Input register Input register: Received data storage area Each text data is stored in this area via the rotary buffer, following the sequence of accessing data. 301 Output register: Send data storage area Output register 601 Mode register Mode set area Register reference area Response status Mode register: Classified into the following three: Mode set area (Data position) Command Reserved Register No Refer to Section for details. Register No Register No Register reference area Register No. 1 Register No Refer to Section for details. Register No Response status 661 Figure 3.1 Registers and Their Usage Errors that occurred in the data transmission and mode-set sequence are stored in the response status area (see Chapter 4 for more details).

30 <Toc> <Ind> <3. Using the Ladder Communication Module > Access Methods Mode Setting Sequence The commands are classified according to three functions. Access is based on the sequence as shown in Figure 3.2. For mode setting, the following three functions can be performed. Setting the control register Resetting the rotary buffer Resetting the port Mode register 1 Input register 601 Command 602 Reserved 301 Output register 603 Reserved 604 Register No.1 Mode set area Register No.2 Mode register Data position 619 Register No.16 Input relay Start-of-Setting: 35 Output relay End-of-Sending Relay: 3 Commands Command = 1 for setting the control register (batch) Set to initialization state (When the power is switched on or when the port is reset, the default values are set.) Command = 2 for resetting the rotary buffer Command = 3 for resetting the port Set register no.1 to n to the default in the Mode Set Area. Reset the serial controller. Reset the rotary buffer.

31 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-4 Register no.1 to n Setting data for the control register (Refer to the list of registers in Table 3.1 (only valid for command 1.) When the power is switched on or when reset is performed, the default value is set. After the settings have been completed, if an error occurs, an error code is set in the response status (data position: 661). The status is set to 0 on normal completion. The timing for the mode setting sequence is as shown in the diagram. Write a ladder program to implement this kind of timing. Ladder program start-of-setting command Ladder program setting completion Mode register setting Start-of-Setting relay (Output relay) End-of-Setting relay (Input relay) Module command-processing start Figure 3.2 Timing Chart for Mode-Set Sequence Command processing completed To start the next setting, be sure to check that the End-of-Setting relay is off. Setting Method Using Control Register By setting the control register, the baud rate, terminator and other communication conditions can be set. (Example) The following shows a baud rate setting of 9600 bps to register no.4. I0001 WRITE Command 1: Control-register set command Set data Slot Data location Number of data WRITE Set 7 to register no. 4 (baud rate) SET Y00435 Set the Start-of-Setting relay. X00403 RST I0001 Set the start relay. RST Y00435 Reset the Start-of-Setting relay after completion of setting. The communication conditions can be set at the same time for several registers. To do this, write the baud rate just under the WRITE command as illustrated above.

32 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-5 Table 3.1 List of Registers Register number 1 (604, 631) 2 (605, 632) 3 (606, 633) 4 (607, 634) 5 (608, 635) 6 (609, 636) 7 (610, 637) 8 (611, 638) 9 (612, 639) 11 (614, 641) 12 (615, 642) 13 (616, 643) 14 (617, 644) 15 (618, 645) 16 (619, 646) Type of register S/C S/C S/C S/C S/C S/C S/C S/C S/C S/C S/C S/C S/C S/C S/C Character length Length of stop bits Parity Transmission rate (bps) F3RZ81- RS control ON F3RZ91- Send/receive ON control F3RZ81- ER control ON 0: 7 bits 1: 8 bits 0: 1 bit 1: 1.5 bits 2: 2 bits 0: none 1: odd 2: even 0: 75 1: 150 2: 300 3: 600 4: 1200 Contents 0: Always ON 1: ON only when sending Default values Others: 8 bits 1 Others: 2 bits 0 Others: even 2 5: : : : others: Refer to (2) on the setting of registers. 0: ER = OFF 1: ER = ON F3RZ91- Send/receive Refer to (2) on the setting of registers. ON control DR check CD check Monitored time before sending starts (DR control monitoring) Specification of the starting character for receive text Specification of the ending character (terminator) Specification of the number of received characters Received character-tocharacter monitoring time XON/XOFF control XON/XOFF characters 0: Sends regardless of the DR state. 1: Sends only when DR is ON. 0: Sends regardless of the CD state. 1: Sends only when CD is OFF. 0: No time-monitoring 1 to (ms) Starting character All 0 when no starting character is specified st ending character 1 st ending character = 0 when there is one character All 0 when no ending character is specified 1 to 1024 (number of characters on the circuit) 0 to (ms) (no character-to-character monitoring when setting 0) 0: Uncontrolled 1: Receiving side only 2: Sending side only 3: Both sending and receiving XON character 2 nd ending character XOFF character $ 0D $ 0A (CR-LF) $11 $13 (DC1 - DC3) 604 to 619: For setting 631 to 646: For reference

33 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-6 Explanation of Control Registers 1) Receive terminator (register number 12) This identifies the end of text when the terminator (end-of-text character) was received. The default (initial value) is CR-LF. (Example) When the terminator ETX ($03) was set: Received data A B C EXT D E F G EXT Text 1 Text 2 2) Specifying by the number of received bytes (register number 11, 13) The end of text is assumed when the specified number of bytes (1 to 1024) was received. When the start-of-text character is specified, the counting of received bytes starts from that character. (Example 1) When the number of received bytes was set to 4 bytes: Received data A B C D E F G H Text 1 Text 2 (Example 2) When the start-of-text character STX ($02), the number of received bytes, 6, and the terminator ETX ($03) were set: Start of Text (Preceding a block of text characters) Start of Text (Preceding a block of text characters) Terminator (End of Text) A B STX P Q R S U STX E N D ETX Discarded Text 1 Text 2 (6-byte transmitted text characters) (Terminator transmitted as an entity) If data are sent during this period, they are not received as text.

34 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-7 3) Receive character-to-character timer (register number 14) The received character-to-character timer monitors the time interval between reception of characters. When the next character is not received within the specified time, it will be regarded as end of text. This is effective for binary communications and text with no terminator. (Example) Receive data (no terminator), character-to-character timer set to 1 second Received data (with no terminator) (Timer setting) Time specified 1000 ms There is no error in the received data even in case of time-out. 4) ( X ON /X OFF control (register number 15, 16) This feature prevents overflow in the communication buffer by exchanging special characters. This feature only applies in full duplex communications. Table 3.2 XON/XOFF operations Classification Receiving side Sending side Operation When the space in the input buffer falls below one-guarter, send XOFF. When the space in the input buffer rises above one-half, send XON. After transmitting XOFF and receiving data in the XOFF state, the XOFF character, resend the XOFF character. The character-to-character timer is inactive during the XOFF state and becomes active once XON is received. After the specified XOFF character is received, sending is stopped within 2 characters. The received XOFF character is assumed to be the receive text and is not passed to BASIC. The system will switch to the X ON state when the power is turned on, or when the module, port or buffer is reset. Any single character can be set as the X ON /X OFF character (default is DC1/DC3). (Note) X ON /X OFF control is only possible during character communications. When sending text, control is not possible as the X ON /X OFF characters are not sent.

35 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-8 Resetting the Rotary Buffer The receiving buffer comprises the secondary buffer (visible from the ladder) and the rotary buffer (primary buffer) for storing multiple text. Secondary buffer (Input register) Primary buffer (Rotary buffer) Input register Rotary buffer Pointer Pointer A B A B C C R L F D E C R L F C R L F X Y C R L F A B C C R L F D E C R L F C R L F X Y C R L F Data flow For CR/LF terminator There is a function for resetting the pointer of the rotary buffer in the primary buffer. As shown in the above diagram, when text 1 is transferred to the secondary buffer after receiving text 4, text 3 remains stored in the rotary buffer. Upon resetting, the pointer of this rotary buffer is shifted from A to B. At this moment, the transferred text in the input register of the secondary buffer remains behind. The End-of-Receiving relay remains ON. When resetting the primary and secondary buffer, first reset the rotary buffer. At that time, if the End-of-Receiving relay remains turned on, turn it off using the End-of-Reading relay. (The reset does not clear the buffer to 0.)

36 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-9 (Example) Program for resetting the buffer after I0001 turns ON (Module is in slot 4) I0001 WRITE SET Y00435 Primary buffer reset X00403 RST Y00435 DIFD I0002 I0002 RST I0001 SET I0003 I0003 X00401 SET Y00433 I0004 X00401 SET I0004 Secondary buffer reset RST Y00433 I0004 RST I0004 RST I0003 Completed Port Reset This function is used to reset the port. All types of communication conditions (all types of register) can be set to their default values. (Example) Program for resetting the port after I0001 turns ON (This module is installed in slot 4.) I0001 WRITE SET Y00435 X00403 RST Y00435

37 <Toc> <Ind> <3. Using the Ladder Communication Module > Control Register Reference Sequence (1) Reference for Control Register The setting contents of the control register can be referenced. Refer to the list (Table 3.1) for details. Mode register 1 Input register 631 Register No Register No Output register 633 Register No Register No. 4 Mode set area Register No. 5 Mode register Register reference area Register No. 16 Data position (2) Access Method The following shows the access method. (Stored in D0200~ of the control register 1 to 16 of the module which is installed in slot 4.) READ D No. of data (words) read Storage device Data location Slot No.

38 <Toc> <Ind> <3. Using the Ladder Communication Module > Send Sequence The send sequence is as shown in Figure 3.3. Before setting the Start-of-Sending relay, set the send text with 2-byte size attached in the output register as given below. Once the Start-of-Sending relay is set, the communications module sends the number of bytes specified in the data size, starting from the data after the 2-byte size data size specified above. The module sets the End-of-Sending relay once the sending has completed. Ladder program Start-of-Sending command Ladder program Confirm end of transmission Start-of-Sending relay (Output relay) End-of-Sending realy (Input relay) Start to send a block Transmission completed of character data set on output register. Figure 3.3 Timing Chart for Data Transmission Sequence The next transmission can be started. [Output data register (Text data to be transmitted)] Size 2 bytes Transmission data 1 Only transmission data is sent. Input register 301 Data size: Expressed in bytes. Output register 601 Data location

39 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-12 Input relay End-of-Sending relay: 2 Output relay Star-of-Sending relay: 34 If an error occurs after the sending has been completed, an error code is set in the response status (data location: 661). The status is set to 0 on normal completion. (Example) A sending program (when installed in slot 4) 30 bytes of send data is prepared in D0101 to D0115 and sending commences at the rising timing of I0001. After 30 bytes have been sent, turn OFF the Start-of-Sending relay. D0100 Data size (30) D0101 D0102 Transmission data D0115 I0001 WRITE D Set send data to communications module. SET Y00434 Reset the Start-of-Sending relay. RST l0001 Set the Start relay. X00402 RST Y00434 Reset the transmission relay after completing transmission.

40 <Toc> <Ind> <3. Using the Ladder Communication Module > Receive Sequence When the text is received, it is stored temporarily in the 2-kilobyte rotary buffer. The rotary buffer can store multiple receive texts. Every time the End-of-Reading relay is switched from ON to OFF, the receive text is transferred to the input register (refer to Figure 3.4). The receive text can be composed by setting the control register. The starting character, ending character, number of received characters and the character-to-character timer can be specified. The default value for the starting character is none, ending character is CR+LF, number of received characters is 1,024 bytes and character-to-character timer is 1.5 seconds. Input register text-set completion Ladder program resets text data in internal register. Receiving text Storing text in rotary buffer. Input register set Input register set (Where there is received text in rotary buffer.) End-of-Receiving relay (Input relay) End-of-Reading relay (Output relay) To internal register Recognition of text received Ladder Transfers data to Text-read completed internal register with READ statement. Figure 3.4 Timing Chart for Data Receiving Sequence

41 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-14 Text can be received with any timing. The received text is stored temporarily in the rotary buffer in this module. When data is read from the secondary buffer using the ladder, data will be transferred automatically from the primary buffer (rotary buffer) to the secondary buffer (input register). Secondary buffer (Input register) Input register Primary buffer (Rotary buffer) Rotary buffer Pointer Pointer A B A B C C R L F D E C R L F C R L F X Y C R L F A B C C R L F D E C R L F C R L F X Y C R L F Data flow For C R /L F terminator Input data register (receiving text format) Status 2 bytes Size 2 bytes Receiving data* Primary buffer (Rotary buffer) 1 Input register Pointer storing received text Text pointer moved to input register Output register * Up to 592-byte data Data location

42 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-15 Status (on a word-size basis) Break received Time-out between characters received Internal buffer overflow Parity error Overrun error Size: Framing error The length of the received data is included. When 7 bytes (unit in bytes) of text are received, 7 is entered in the size field. End-of-Receiving relay: 1 Input relay End-of-Reading relay: 33 Output relay Example of receiving data (in slot 4) X00401 READ D Enters received text into data register and Y00433 sets End-of-receiving relay. Data received D0200 Status D0201 D0202 Data size (Received) Number of bytes received is entered. Received data D0219 In this example, the length of the received data is assumed to be less than 36 bytes and the Read Size is set to 20 words. However, the read amount of the received data can be changed according to the received size after reading the status and the data size (received).

43 <Toc> <Ind> <3. Using the Ladder Communication Module > Multipoint Connections Besides point-to-point (1:1) connections, multi-point (n : n) connections are also possible for F3RZ91-0N. (1) External connection F3RZ91-0N is based on the RS-422-A and RS-485 standards. The number of possible connections for the respective specifications are as shown in Table 3.3. Table 3.3 Number of possible connections 1:n RS-422-A 1:10 RS-485 1:32 2 types of external connection mode are supported, namely, the 4-wire system and the 2-wire system. The 4-wire connection is in the 1:n format where there are n substations for one master station. The 2-wire connection will be in the 1 : n format. Figure 3.5 shows examples of the respective connections. For the 4-wire connection, the send/receive signal wire from the master station to the substations have to be crossed. For the 2-wire connection, the send/receive signal of similar polarities is connected to the terminal block in this module. Only 2 wires (+ ground, shielded) are laid externally.

44 <Toc> <Ind> <3. Using the Ladder Communication Module > wire, multipoint (Master station) (Substation 1) F3RZ91-0N port terminal Remote equipment (Substation 2) Remote equipment (Substation n) Remote equipment * 2 SD A (SD A) SD A (SD A) SD A (SD A) SD A SD B (SD B) SD B (SD B) SD B (SD B) SD B * 2 * 2 RD RD A B (RD A) (RD B) RD RD A B (RD A) (RD B) RD RD A B (RD A) (RD B) RD RD A B * 2 S G (SG) S G (SG) S G (SG) S G F G F F G * 1F G (SHIELD) 2-wire, multiport (Station 1) (Substation 2) F3RZ91-0N port terminal Remote equipment (Substation 3) Remote equipment (Substation n) Remote equipment SD A (A) A (A) A (A) A SD B (B) B (B) B (B) B * 2 * 2 RD A RD B S G (SG) S G (SG) S G (SG) S G F G F G F G * 1F G (SHIELD) Figure 3.5 Multipoint Interconnections *1 Connect the shielding wire to both sides of the FG or SHIELD terminals. *2 For the terminating resistor, see (3), "Setting Terminating Resistor."

45 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-18 (2) Setting Registers Depending on the configuration of the external connection, 3 types of mode can be used in this module, namely, 4-wire master station, 4-wire substation and 2-wire system. If the register settings corresponding to the 3 modes are not performed, normal communication is not possible. The register settings corresponding to the different modes are performed according to the data in Table 3.4 using registers 5 and 6. Table 3.4 Register 6 Register Setting not possible 2-wire system 1 4-wire master station (default) 4-wire substation (3) Setting Terminating Resistors For the terminating resistors found in multi-point connections (also including point-to-point connections), terminating resistors are set at the stations located on the respective communication routes. 4-wire system Set the terminating resistor at the master station and substation n in Figure 3.5. For the intermediate substation 1 to substation (n-1), remove the terminating resistors. If they are not removed, normal communications may not be possible (refer to Figure 3.6(b)). In the case of F3RZ91-0N, the terminating resistor is built-in and is controlled by a switch. Set to "4-WIRE" for terminal stations and "OFF" for the rest (refer to Figure 3.7). 2-wire system Set the terminating resistor at station 1 and station n as in Figure 3.5. Ensure that the terminating resistors are removed from station 2 to station (n-1) (refer to Figure 3.6(c)). In the case of F3RZ91-0N, the terminating resistor is built-in. Set to "2-WIRE" for terminal stations and "OFF" for the rest (refer to Figure 3.7).

46 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-19 (a) For the 4-wire system, RS42-0N terminal station (b) For the 4- or 2-wire system, RS42-0N station is not the last in the line: (c) For the 2-wire system, RS42-0N terminal station SD A SD A SD A SD B SD B SD B RD A RD A RD A RD B RD B RD B S G Disconnected S G Disconnected S G SHIELD SHIELD SHIELD Figure 3.6 Installation and Removal of Terminating Resistors for F3RZ91-0N Module RDY F3 RZ91-0N RS422 TERMINATOR 2-4-WIRE OFF SD A TERMINATOR 2-4-WIRE OFF SD B RD A RD B SG SHIELD Figure 3.7 Setting Terminating Resistor for F3RZ91-0N Module

47 <Toc> <Ind> <3. Using the Ladder Communication Module > 3-20 (4) Protocol Processing When using multi-point connections with F3RZ91-0N, a protocol (communication control procedures) is essential to prevent circuit conflicts along the transmission route. Although the FA-M3 provides the physical interfaces, it does not support protocol processing in the system. Therefore, the protocol control must be defined using a ladder. Normally, the polling selection method is used. FA-M3 Application Protocol Physical interface Application program ranges Remote equipment Remote equipment When transmitting from F3RZ91-0N to the remote equipment, the equipment number must be set to identify the destination. The equipment number refers to the identification number assigned to the remote equipment. The remote equipment must be distinguished in advance according to its unique identification number by some means. The text formats containing the equipment number vary according to the individual protocols.

48 <Toc> <Ind> <4. Response Status > Response Status In both mode setting and send sequences, the response status is set on completion of processing. The status is 0 when normal. When errors occur, the error codes are set according to the table below. Table 4.1 Error Codes Code Definition Probaele causes Error in function specification An unsupported command was being executed. Specification of slot number and port number clashes with other I/O modules. Parameter error Port number is invalid. Non-existent register number is specified in the control register settings. C7 Reset detected E6 Timeout Only the module side detected a power failure and performed a reset/start. This leads to inconsistency between the parameters at the module side and driver side. Cable is not connected. Sending side CS is OFF. When CD check is 1 and the time when sending can be monitored = 0, CD is ON. When DR check is 1 and the time when sending can be monitored = 0, DR is OFF. (caused by defective cables or remote equipment)

49 <Toc> <Ind> <4. Response Status > 4-2 <Communications program example for UT37> This program reads SP1 repeatedly for UT37 in address 1 and stores the received data in D0400. The transmission rate is set at 9,600 bps. (0001) (0002) M035 MOV $8 D0200 MOV $1 D0201 Creating text to be sent D0200 D0201 D0202 D0203 D0204 $0008 $0001 $3000 $0000 $0D0A (0003) MOV $3000 D0202 TXT size SPI read (0004) (0005) MOV $0 D0203 MOV $DOA D0204 Temp. controller address Termination (0006) M035 RST Y00433 (0007) RST Y00434 Reset start flag. (0008) RST Y00435 (0009) Module reset (0010) I0005 WRITE Port reset commands (0011) SET Y00435 Start-of-Setting relay: ON (port reset start) (0012) (0013) M035 I0007 X00401 SET SET I0005 Y00433 Set Port-reset start flag after completing one scan. Reset Secondary-buffer. (0014) SET I0006 (0015) I0006 X00401 RST Y00433 Secondary-buffer reset completed (0016) RST I0006 (0017) D0051 = D Debugging counter (not required) (0018) I0006 SET I0001 Set Communication-conditions. (0019) (0020) I0001 I0005 X00403 RST RST I0007 Y00435 Port-reset start flag: Indicates the next processing request after completing setting. (19, 17) (0021) DIFD I0009 (0022) I0009 RST I0005 (0023) SET I0007 Secondary-buffer reset-start flag: ON (0024) * * * * * * Communications-condition (communications rate) setting (0025) I0001 WRITE Communications-condition set command: 1 (0026) WRITE Baud-rate set value: 7 (9600 bps) (0027) SET Y00435 Start-of Setting relay ON: Start setting baud rate. (0028) D0052 = D Debugging counter (not required)

50 <Toc> <Ind> <4. Response Status > 4-3 (0029) I0001 X00403 RST Y00435 Setting completed: Baud-rate setting completed (0030) RST I0001 (0031) DIFD I0003 (0032) (0033) I0003 I0004 SET I0004 IL Start data transmission/reception. (0034) * * * * * * Transmission (0035) (0036) I0003 I0008 SET I0002 (0037) I0002 WRITE D Set transmitting text to module output register. Start-of-Sending relay: ON (0038) SET Y (0039) RST I0002 (0040) D0050 = D Debugging counter (0041) X00402 RST Y00434 End-of-Sending relay: ON Transmission completed (0042) * * * * * * Receiving data Processing SP1 values from UT37 (0043) X00401 READ 4 1 D End-of-Sending relay: ON Text received Store (input register) into data register. (0044) SET Y00433 Data read: ON (0045) D0300 = 01 MOV D0304 D0400 Check received status is OK, and store SP1 values in D0400. (0046) DIFD I0008 To move to the next access, activate I0003. (0047) X00401 RST Y00433 End-of-Reading relay: OFF (0048) ILC (0049) * * * * * * Response status (0050) (0051) X00403 X00402 READ D Stores transmission errors or errors in baud-rate setting into data registers. (0052) * * * * * * Communications condition reference (0053) M033 READ D Read module communication conditions into data register D0500. (0054) READ D Read module communication conditions (set values) into data register D0600. Figure 4.1 Example of Programs for Communicating with UT37 This program assumes that there is a receive for every send. In communications, there will be instances when the receive text is not received. For send and receive programs, use of a timer is highly recommended.

51 <Toc> <Ind> <4. Response Status > 4-4 Debugging Operation During debugging, the program can be stopped by leaving the Start-of-Sending relay and the End-of-Reading relay ON. In particular, when text is sent from the device at the remote side, the receiving side stores it in the rotary buffer and the End-of-Receiving relay turns ON. One manual method for resetting the relay can be carried out by using the device monitor of the Ladder Program Support Tool M3. For instance, when there is data in the receiving buffer and the End-of-Receiving relay is ON (1), 1) Open the device monitor in debug mode and go to the I/O relay screen. 2) Set the End-of-Reading relay (33). 3) When the End-of-Receiving relay turns OFF, RESET the End-of-Reading relay (33). 4) When multiple texts are received, the End-of-Receiving Relay (1) switches to ON immediately. In this case, repeat 2) and 3). If the End-of-Receiving relay (1) does not turn ON anymore, it means the receiving buffer has been cleared. When the Start-of-Sending relay and the Start-of-Setting relay are left ON 1) Open the device monitor in debug mode and go to the I/O relay screen. 2) Reset the Start-of-Sending relay (34). The End-of-Sending relay (2) switches to OFF automatically.