INSTRUCTION MANUAL MICRO-DCI. MicroLink. PN24470 Rev.1

Transcription

1 INSTRUCTION MANUAL MICRO-DCI MicroLink PN24470 Rev.1

2 MicroMod Automation, Inc. The Company MicroMod Automation is dedicated to improving customer efficiency by providing the most ost-effective, application-specific process solutions available. We are a highly responsive, application-focused company with years of expertise in control systems design and implementation. We are committed to teamwork, high quality manufacturing, advanced technology and unrivaled service and support. The quality, accuracy and performance of the Company's products result from over 100 years experience, combined with a continuous program of innovative design and development to incorporate the latest technology. Use of Instructions Warning. An instruction that draws attention to the risk of injury or death. Caution. An instruction that draws attention to the risk of the product, process or surroundings. Note. Clarification of an instruction or additional information. i Information. Further reference for more detailed information or technical details. Although Warning hazards are related to personal injury, and Caution hazards are associated with equipment or property damage, it must be understood that operation of damaged equipment could, under certain operational conditions, result in degraded process system performance leading to personal injury or death. Therefore, comply fully with all Warning and Caution notices. Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual for any other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval of MicroMod Automation, Inc. Licensing, Trademarks and Copyrights MOD 30 and MOD 30ML are trademarks of MicroMod Automation, Inc. MODBUS is a trademark of Modicon Inc. Health and Safety To ensure that our products are safe and without risk to health, the following points must be noted: The relevant sections of these instructions must be read carefully before proceeding. 1. Warning Labels on containers and packages must be observed. 2. Installation, operation, maintenance and servicing must only be carried out by suitably trained personnel and in accordance with the information given or injury or death could result. 3. Normal safety procedures must be taken to avoid the possibility of an accident occurring when operating in conditions of high 4. pressure and/or temperature. 5. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry. Normal safe handling procedures must be used. 6. When disposing of chemicals, ensure that no two chemicals are mixed. Safety advice concerning the use of the equipment described in this manual may be obtained from the Company address on the back cover, together with servicing and spares information. All software, including design, appearance, algorithms and source codes, is copyrighted by MicroMod Automation, inc. and is owned by MicroMod Automation or its suppliers.

3 Contents Table of Contents 1.0 INTRODUCTION MICROLINK OVERVIEW MICROLINK NETWORK SIZING NETWORK DISTANCE ASSESSING THE COMMUNICATIONS LOAD PROCEDURE TO ASSESS COMMUNICATIONS LOAD EXAMPLE OF NETWORK COMMUNICATIONS LOAD CALCULATION MICROLINK INSTALLATION NETWORK HARDWARE FOR THE PROCESS CONTROL STATION, SUPERVISOR-PC UNIT, AND PC UNIT WITH THE 53WS5000 PRODUCT PACKAGE INSTALLED PROCESS CONTROL STATION SUPERVISOR-PC UNIT PC UNIT WITH 53WS5000 PRODUCT PACKAGE INSTALLED CABLING NODE PARAMETER ENTRIES SUPERVISOR-PC UNIT PARAMETER ENTRIES PARAMETER ENTRIES FOR PC UNITS WITH THE 53WS5000 PRODUCT PACKAGE INSTALLED PROCESS CONTROL STATION PARAMETER ENTRIES MICROLINK NETWORK MANAGEMENT SUPERVISOR-PC UNIT PROCESS CONTROL STATION MICROLINK TROUBLESHOOTING MICROLINK PARTS LIST 21 i

4 Contents 8.0 CONFIGURING THE 53MC5000 PCS AS A GATEWAY MC5000 PCS GATEWAY OVERVIEW CONFIGURING THE 53MC5000 PCS GATEWAY PARAMETERS PERFORMANCE TUNING ACCESSING DATALINK INSTRUMENTS FROM MICROLINK NODES SETTING MICROLINK SUPERVISOR-PC UNIT PARAMETERS MICROLINK SUPERVISOR-PC UNIT PARAMETER REFERENCE TABLE APPROXIMATING MICROLINK SUPERVISOR-PC UNIT PARAMETERS PCS EXTERNAL INPUT MODULE CONSIDERATIONS ACCESSING MICROLINK NODES FROM THE DATALINK SUPERVISOR-PC UNIT OR HOST SETTING DATALINK SUPERVISOR-PC UNIT PARAMETERS GATEWAY CABLING Figure Listing Figure 2-1. Typical MicroLink Networks Figure 4-1. MicroLink Cabling Diagram Figure 4-2. MicroLink T-Configuration Figure 8-1. Gateway As Datalink Interrogator Figure 8-2. Gateway As Datalink Responder Figure 8-3. Datalink Interrogator Gateway Installation (Cord Set) Figure 8-4. Datalink Interrogator Gateway Installation (Rear Terminal Board) Figure 8-5. Datalink Responder Gateway Installation (Cord Set) Figure 8-6. Datalink Responder Gateway Installation (Rear Terminal Board) Table Listing Table 2-1. Attributes of Typical MicroLink Networks Table 3-1. Recommended Maximum Network Cable Lengths Table 3-2. SUPERVISOR SCAN Times Table 7-1. Parts List Table 8-1. MicroLink SUPERVISOR-PC Unit Values for B04 - B Table 8-2. Baud Rate - Transaction Time (ms) ii

5 Section 1. Introduction 1.0 INTRODUCTION The MICRO-DCI family of microprocessor-based control instruments supports the Datalink and MicroLink communications architectures. Datalink is an interrogator/responder serial interface and MicroLink is a Carrier Sense Multiple Access (CSMA) network permitting direct communication between any two nodes (peer-to-peer). Both networks use an RS485 physical interface. This manual contains the specifications and implementation instructions for the MicroLink option, as well as information to interconnect MicroLink and Datalink networks via a 53MC5000 PCS configured as a gateway. 1

6 Section 2. MicroLink Overview 2.0 MICROLINK OVERVIEW MicroLink is a low-cost, high performance interfacing network for 53MC5000 Process Control Stations (PCS), 53SU5000 SUPERVISOR-PC units, and PC units with the 53WS5000 product package installed. A Single MicroLink network supports 32 nodes of which four can be assigned to 53SU5000 SUPERVISOR-PC units. Each 53SU5000 SUPERVISOR-PC unit must have a MicroLink SUPERVISOR board and software installed to function on the network. The SUPERVISOR-PC unit provides Engineering Mode and Operator functions for the network system. Engineering Mode functions are used for system initialization, to create animated displays, and to build the underlying process control programs. Operator functions allow an operator (if required) to view the animated displays that reflect the status of the process(es) monitored by the network and to intervene, if necessary, by the SUPERVISOR-PC unit operator s keyboard. Each 53WS5000 product package must include the MicroLink SUPERVISOR board and software installed in a PC unit to function on the network. The software in the 53WS5000 product package provides the tools to configure online instruments or offline databases that can be downloaded to instruments. It provides a graphic configuration module that is used to symbolically design control strategies for the 53MC5000 PCS. Each graphic control strategy can be compiled into code for downloading to a PCS. The software also provides an F-TRAN compiler; SUPERVISOR utilities to create files for later transport to SUPERVISOR-PC units; a Documenter for hardcopy output (the Documenter has an optional feature to capture a PCS display for storage and printing); the ability to menu select other user applications; and a displayable Instruction Bulletin used for referencing. A PC unit with the appropriate 53WS5000 hardware and software options installed can function as a host to SUPERVISOR-PC units via a DECnet interface. As a host to the SUPERVISOR-PC units, the PC unit executing the software can perform file management functions to put, get, delete, or archive files. A 53MC5000 Process Control Station in the MicroLink network is a multi-configurational device capable of being set up to perform a wide range of process application control strategies. To function on the network, a PCS must have Expansion Ready capabilities and a minimum communications option that is a Single High Speed Communications Board (e.g., model number 53MC5000 B D where B = Expansion Ready, D = Single High Speed Communications Board Only, and = other options). MicroLink network communication is peer-to-peer. Any node (53MC5000 PCS, 53SU5000 SUPER- VISOR-PC unit or PC unit with the 53WS5000 product package installed) requiring access, monitors the network for activity. If the network is clear, it sends a command packet (COMMAND) containing a destination identifier and data. Although the command packet appears on the entire network, only the node having the correct identifier can capture the incoming data. To indicate a successful data transfer, a response message (RESPONSE) is put onto the network by the receiving node. In the event two or more nodes detect network inactivity and attempt to send command packets, a data collision occurs preventing the messages from being sent. Each sending node determines the collision occurred when a response is not received within a preset time. When the node detects the collision, it attempts a retry. 3

7 Section 2. MicroLink Overview The MicroLink COMMAND-RESPONSE sequence is called a transaction and network through-put is gauged as Transactions per Second (TPS) which is a function of the data transfer rate measured in bits per second. The maximum MicroLink network data transfer rate is 2 Megabits/second (2 Mbit/s); however, MicroLink networks with SUPERVISOR-PC units or PC units with the 53WS5000 product package installed, are restricted to 1 Mbit/s or less. Typical enhancements and expansions to the Single MicroLink network are a Single Redundant network, a Double network, and a Double Redundant network. The 53MC5000 PCS, the 53SU5000 SUPERVISOR-PC unit, and the PC unit with the 53WS5000 product package installed are all capable of accepting a second MicroLink network to provide redundancy. If the first network (Network A) fails, communication is automatically established on the second network (Network B). To enable a SUPERVISOR-PC unit or a PC unit with the 53WS5000 product package installed to communicate on a Single Redundant network, a Redundant Microlink card (p/n 686B626) must be installed next to the MicroLink SUPERVISOR board. A Double Redundant MicroLink network requires two MicroLink SUPERVISOR boards, each with its own Redundant MicroLink card installed next to it. A 53MC5000 PCS installed on a redundant network (Single or Double), requires installation of a second Communications Option card (p/n 686B599). Table 2-1 lists the comparative attributes of typical MicroLink networks and Figure 2-1 is a basic illustration of those networks. In Figure 2-1, a PC unit with the 53WS5000 product package can be installed in lieu of a PCS on the node or a PC unit can have both software packages installed for SUPERVISOR-PC or 53WS5000 functionality. 4

8 Section 2. MicroLink Overview Table 2-1. Attributes of Typical MicroLink Networks MicroLink Network Max. No. of Nodes Network A B SUPV Boards Redundant Cards Comm Cards in PCS* Single 32 Y N Single Redundant 32 Y Y Double 64 Y N Double Redundant 64 Y Y *Number of Communication Option Cards in each 53MC5000 PCS in the MicroLink network. Figure 2-1. Typical MicroLink Networks 5

9 Section 3. MicroLink Network Sizing 3.0 MICROLINK NETWORK SIZING The network s cable length requirements as well as the communications data load must be estimated for efficient network resource allocation. 3.1 NETWORK DISTANCE The maximum physical length of a MicroLink network depends on two factors: the data transfer rate and the quality of the interconnecting cable. Typically it is desirable to operate the MicroLink network at the highest achievable data transfer rate. Cable should be selected on this basis; however, to minimize the expense of re-cabling, the potential growth of the network, as well as the possibility of future network reconfigurations to higher data transfer rates should also be considered. Table 3-1 shows the recommended maximum cable length for the entire network as a function of data transfer rate and cable quality. The low performance modular cable is terminated at each end with RJ11 style connectors that plug directly into a 53MC5000 PCS, a 53SU5000 SUPERVISOR- PC unit, a PC unit with the 53WS5000 product package installed, or a Communication Interface Terminal Board (ITB). Modular cable is primarily used for interconnecting nodes within the same cabinet or panel. For limited distances it provides a very inexpensive yet reliable interconnection. Modular cable with connectors already installed is available in standard lengths as listed in Section 7, MicroLink Parts List. Table 3-1. Recommended Maximum Network Cable Lengths* Mode Data Rate Transactions per Second Modular Shielded Twisted Pair Shielded Twin- Axial 0 2 Mbit/s** (15) 100 (31) 200 (61) 1 1 Mbit/s (31) 500 (152) 1000 (305) Mbit/s (61) 1000 (305) 2000 (610) Mbit/s (122) 2000 (610) 4000 (1219) *End-to-end network cable length = feet (meters). **A MicroLink Network that has a SUPERVISOR-PC unit or a PC unit with the 53WS5000 product package installed is restricted to 1 Mbit/s or less. When longer distance runs are required a higher performance cable is needed. Two higher performance cable types are a good quality shielded twisted pair cable (Belden 9841 or equivalent), and a high quality shielded twin-axial cable (Belden 9860 or equivalent). Belden 9841 and 9860 cable types have been found to be satisfactory. Both of these cable types must be purchased locally or from the manufacturer. (Transition from cabinet modular cable RJ11 connectors to the compression terminal block connectors that are required by shielded twisted pair and shielded twin-axial cables is effected at the Communications ITB [p/n 686B622].) 7

10 Section 3. MicroLink Network Sizing 3.2 ASSESSING THE COMMUNICATIONS LOAD Data through-put of the MicroLink network depends primarily on the communications data transfer rate. Column 3 in Table 3-1 shows the number of Transactions per Second that the network can support for each of the four available data rates. The number of Transactions per Second required for a specific application can be calculated by determining the number of transactions required at each node. The total of the transactions at each node provides the total network load. If this load is greater than the maximum TPS for the selected data rate, then the loading at individual nodes must be reduced or the data rate increased. Procedural steps to assess the communications load are provided in sub-section and an example is provided in sub-section PROCEDURE TO ASSESS COMMUNICATIONS LOAD To assess the network load, perform the following steps: 1. Calculate the loads for each 53SU5000 SUPERVISOR-PC unit by accessing the SU- PERVISOR templates (IB 53SU5000, Section 4, Database) for the following information: 1a. Determine the total number of CON templates with B02 set to a value other than b. Determine the total number of F-TRAN instrument reads or writes in a single scan by counting the operands containing INS as module type. 1c. SUPERVISOR-PC unit loads = 1a + 1b. 1d. Reference the appropriate data transfer rate (Mbits/s) column in Table 3-2 to determine the shortest scan time possible for the loads calculated in 1c. If this scan time is still too long in duration for system requirements, then the loads must be reduced by modifying the SUPERVISOR-PC unit CON templates configuration or the F-TRAN instrument reads and writes. Repeat this process for each SUPERVISOR-PC unit in the network. 2. Convert the SUPERVISOR-PC unit loads to SUPERVISOR-PC unit TPS with TPS = loads/scan File Index (SUP0.B03). Sum the TPS for each SUPERVISOR-PC unit. Reference the appropriate data transfer rate (Mbits/s) column in Table 3-1 to ensure the corresponding network TPS is not exceeded. 3. Allow 50 TPS for each PC unit with the 53WS5000 product package installed. Total TPS = Number of PC units with the 53WS5000 product package installed X 50. 8

11 Section 3. MicroLink Network Sizing 4. Access the Process Control Station External Input Module (IB 53MC5000, Section 4) and sum the reciprocals of the PSCAN values for each peer-to-peer task with PMOD 0 to determine the TPS for that node. (Each configured task in the External Input Module is 1 load; therefore, if TPS = loads/scan time, then TPS = 1/scan time. For example, if there are 4 instrument reads listed in the External Input Module with PSCAN values of 2, 4, 2, and 1, then the node TPS = 1/2 + 1/4 + 1/2 + 1/1 = 2.25.) Repeat Step 4 for each PCS node on the network. 5. To determine the network TPS: total the TPS for all of the nodes, add this to the total SUPERVISOR-PC unit TPS obtained in Step 2, and the total TPS obtained in step 3 for PC units with the 53WS5000 package installed. Reference Table 3-1 again to verify that the network TPS just calculated is still valid (not too large) for the data rate (Mbits/s). If the network TPS just calculated exceeds the maximum TPS number at the data rate listed in Table 3-1, then some transactions may not be completed within the specified scan time; network loading should be reduced by increasing the scan time of some SUPERVISOR-PC units. Table 3-2. SUPERVISOR SCAN Times SCAN 1 Mbit/s 0.5 Mbit/s 0.25 Mbit/s Time Seconds Note: Table 3-2 assumes there are no gateways (described in Section 8) interconnecting Datalink and MicroLink networks. Transactions Per Second for a given Scan Time and Data Rate are reduced if there is cross network communication through gateways. 9

12 Section 3. MicroLink Network Sizing EXAMPLE OF NETWORK COMMUNICATIONS LOAD CALCULATION Assumptions: Network Data Rate is set at 1 Mbit/s as dictated by configuration settings, network size, and cable type; 2 SUPERVISOR-PC units on the network; 1 PC unit with the 53WS5000 product package installed on the network; and 14 PCS modules on the network. 1. Calculate loads and TPS for the SUPERVISOR-PC units: SUPV 1LD SUPV 2LD TOTAL 1a. CON B02 255, L00 = 1, b. F-TRAN Reads/Writes c.Totals d. Select required SCAN for load SUPERVISOR-PC units1+2 TPS = loads/scan File index (in Table 3-1, 308 is less than 500) 3. One PC unit with the 53WS5000 product package installed = 50 TPS. 4. Calculate PCS TPS. PCS modules 1,7,9 each have 3 peer-to-peer READS; PCS 4 has 5 peer-to-peer READS; PCS 5 has 4 peer-to-peer READS; and PCS modules 2,3,6,8,10-14 each have 2 peer-to-peer READS. PCS PSCAN Reciprocals TPS 1 2,3,4 1/2 + 1/3 + 1/ ,4,4 1/4 + 1/4 + 1/ ,1, ,2,4,4,5 1/2 + 1/2 + 1/4 + 1/4 + 1/ ,2,1,1 1/2 + 1/ ,3,6,8, ,2 9 X (1 + 1/2) TOTAL PCS1-14 TPS Calculate the total network communications load (TPS): TOTAL TPS for SUPERVISOR-PC units + TOTAL TPS for PC units with 53WS5000 product package installed + TOTAL PCS TPS = TOTAL NETWORK TPS = 381 TPS Verifying with Table 3-1 indicates a network TPS of 381 is valid, as it is less than the 500 maximum for a data transfer rate of 1 Mbit/s. 10

13 Section 4. MicroLink Installation 4.0 MICROLINK INSTALLATION The three major steps of a MicroLink installation are ensuring that all equipment hardware is properly configured, connecting the cables to the network nodes, and defining the operating characteristics of each node with parameter entries. 4.1 NETWORK HARDWARE FOR THE PROCESS CONTROL STATION, SUPERVISOR-PC UNIT, AND PC UNIT WITH THE 53WS5000 PRODUCT PACKAGE INSTALLED PROCESS CONTROL STATION To order a Process Control Station with the communications option board(s) already installed, the appropriate model number must be specified at the time of purchase. (See IB 53MC5000 for the model number breakdown.) Communications option boards can also be added to existing instruments. If the PCS is an Expansion Ready model (e.g. 53MC5000 B, where B = Expansion Ready capabilities and = other options), then the MicroLink option board plugs directly into the Expansion board as follows: Follow the instructions in Section 6 of IB 53MC5000 to access the Expansion PCB. Insert the first communications option card into Expansion board connectors J7 and J8 (second slot from the front). This is Network A. Connections to Network A are made by plugging cables into J6 and J7 on the rear terminal board. (See Figure 4-1.) If a redundant network is to be implemented: Follow the instructions in Section 6 of IB 53MC5000 to access the Expansion PCB. Install the second communications option card into Expansion board connectors J9 and J10 (the slot closest to the front of the instrument). This is Network B. Connections to Network B are made by plugging cables into J8 and J9 on the rear terminal board. (See Figure 4-1.) NOTE The transient protection components used in 53MC5000 PCS Expansion boards shipped before October 1990 present a larger load to the MicroLink than those currently used. MicroLink networks with more than 6 of these boards may have cable length to TPS characteristics less favorable than those stated in Table

14 Section 4. MicroLink Installation SUPERVISOR-PC UNIT The 53SU5000 SUPERVISOR-PC unit can be ordered with MicroLink communications capabilities, or an existing unit that is an IBM AT-compatible PC (see IB 53SU5000, Section 2, for specified vendor model numbers and minimum configuration) can be field upgraded with installation of a MicroLink SUPERVISOR board (p/n 686B619) and software. Standard Datalink SUPERVISOR boards (p/n 686B574) can not be upgraded to MicroLink network functionality. It is possible to have one standard Datalink SUPERVISOR board and one MicroLink SUPERVISOR board, or two MicroLink SUPERVISOR boards, in the same PC unit. The SUPERVISOR board can be installed in any full length slot of an IBM AT-compatible PC as described in IB 53SU5000, Section 2 (Installing the SUPERVISOR-PC Cards). If the SUPERVISOR-PC unit is installed on a redundant network, then the redundant MicroLink card must be installed in the slot immediately to the right of the MicroLink SUPERVISOR board. Installation of the MicroLink SUPERVISOR board is the same for non-redundant and redundant networks PC UNIT WITH 53WS5000 PRODUCT PACKAGE INSTALLED The 53WS5000 product package can be ordered with MicroLink communications capabilities to be installed into a PC unit that is an IBM AT-compatible PC (see IB 53WS5000, Section 2, for minimum PC configuration). As with the SUPERVISOR-PC unit, it is possible to have one standard Datalink SUPERVISOR board (p/n 686B574) and one MicroLink SUPERVISOR board (p/n 686B619), or two MicroLink SUPERVISOR boards, in the same PC unit. The SUPERVISOR board can be installed in any full length slot of an IBM AT-compatible PC as described in IB 53WS5000, sub-section If the PC unit is installed on a redundant network, then the redundant MicroLink card must be installed in the slot immediately to the right of the MicroLink SUPERVISOR board. Installation of the MicroLink SUPERVISOR board is the same for non-redundant and redundant networks. 4.2 CABLING A detailed illustration of MicroLink network cabling is provided as Figure 4-1. Note that the SUPER- VISOR board and the SUPERVISOR redundant MicroLink card each have only a single modular connector for MicroLink attachment. Therefore, a Communications Interface Terminal Board is needed to provide two connections when the network is arrayed in a T-Configuration as illustrated in Figure 4-2. Figure 4-2 shows the drop cable (T-stem) coming from the ITB to the PC. (The drop cable should be as short as possible, preferably less than five feet [1.5 meters].) Network cables interconnect network nodes to the left and to the right of the Communications ITB (T-bar). Also, at each physical end of the network, a Communications ITB is installed as a terminator. The termination resistors installed on the Communications ITB are designed for 12 or more nodes on the network. If one to three nodes are installed, the standard 100 ohm terminating resistor should be removed and replaced with a 910 ohm resistor (p/n 161K228U24). If the network has four through eleven nodes, the standard 100 ohm terminating resistor should be removed and replaced with a 470 ohm resistor (p/n 161K228U17). The resistors should be changed in both terminators and should be connected between terminals 3 and 4 of TB1 on the Communications ITB. If the Communications ITB is to be used for interconnection instead of termination, the resistors should be removed. 12

15 Section 4. MicroLink Installation 4.3 NODE PARAMETER ENTRIES SUPERVISOR-PC UNIT PARAMETER ENTRIES Refer to IB 53SU5000 for SUPERVISOR-PC unit database information (Section 4) and configuration procedures (Section 5). To set up a SUPERVISOR-PC unit for MicroLink operation: 1. Load the MicroLink SUPERVISOR-PC unit s unique address (0-31) into database location SUP00.B01 (the SUPERVISOR-PC unit is also a node on the MicroLink network; therefore, this address can not be assigned to any other node on the network). 2. Set database location SUP00.B02 to the MicroLink Mode. Mode 0 (2 Mbit/s) is not currently supported for a MicroLink network that includes a SUPERVISOR-PC unit, or a PC unit with the 53WS5000 product package installed. The network is therefore restricted to data rates of 1 Mbit/s or less, so SUP00.B02 should be set to 1 (1 Mbit/s), 2 (0.5 Mbit/s), or 3 (0.25 Mbit/s). The SUPERVISOR-PC unit must be reset after changing its MicroLink mode or address. 3. Select the desired peer-to-peer tasks as described in IB 53SU5000. It should be noted that the F-TRAN program executed on a MicroLink SUPERVISOR-PC unit can access data in Process Control Stations, other SUPERVISOR-PC units, and PC units with the 53WS5000 product package installed using the standard INS notation; however, this notation does not permit the specification of a data base module type (e.g., CON, SDT, PLC, etc.) in the remote instrument. For example, the F-TRAN statement B99 = INS10.B80 ; would read the value of B80 from the instrument at address 10 and store it in B99 of the SUP00 database in the SUPERVISOR-PC unit. Only access to a remote SUPERVISOR- PC unit SUP00 database is permitted, which has been extended to overlap much of the other template data. This means that SUP00 addresses can be used to access data in PLC, SDT, CON, and PAR templates as shown on the map information that follows. This data is therefore still available to SUPERVISOR-PC unit F-TRAN programs, F-TRAN programs of PC units with the 53WS5000 product package installed, and the External Input Module of the Process Control Station. INSxx. L00 - L95 L104 - L359 L360 - L615 B00 - B99 B100 - B119 B120 - B143 B144 - B683 B684 - B707 C00 - C449 C450 - C513 H00 - H383 maps to SUP00.L00 - SUP00.L95 PLC00.L00 - PLC00.L255 PLC01.L00 - PLC01.L255 SUP00.B00 - SUP00.B99 PLC00.B00 - PLC01.B09 SDT00.B00 - SDT23.B00 CON00.B00 - CON89.B05 PAR00.B00 - PAR23.B00 CON00.C00 - CON89.C04 PLC00.C00 - PLC01.C31 PAR00.H00 - PAR23.H15 13

16 Section 4. MicroLink Installation A00 - A23 SUP00.A00 - SUP00.A23 A24 - A431 SDT00.A00 - SDT23.A16 A432 - A611 A612 - A635 CON00.A00 - CON89.A01 PAR00.A00 - PAR23.A00 The mapping shown above applies to a Revision 4.1 or higher SUPERVISOR board. The mapping in a Revision 4 SUPERVISOR board is: L100 - L355 L356 - L611 PLC00.L00 - PLC00.L255 PLC01.L00 - PLC01.L255 For example, the F-TRAN statement (assumes INS01 is a SUPERVISOR-PC unit) PLC00.L00 = INS01.L104 ; copies the template PLC00 s L00 bit from instrument 01 to the PLC00.L00 bit at the node executing the F-TRAN statement PARAMETER ENTRIES FOR PC UNITS WITH THE 53WS5000 PRODUCT PACKAGE INSTALLED Refer to IB 53WS5000 sub-section to set parameters B01 (MicroLink Address 0-31) and B02 (MicroLink Mode). The MicroLink SUPERVISOR card in the PC unit requires a unique MicroLink Address 0-31 (parameter B01) that is not assigned to any other node on the network. MicroLink Mode (parameter B02) options are used to select the data rate as follows: Mode 1 = 1 Mbit/s, Mode 2 = 0.5 Mbit/s, and Mode 3 = 0.25 Mbit/s. Mode 0 (2 Mbit/s) can not be selected PROCESS CONTROL STATION PARAMETER ENTRIES Refer to IB 53MC5000 for a description of data entry methods. To set up a Process Control Station for MicroLink operation: 1. Set PCS database location B01 to its assigned Instrument Address (0-31). Each instrument on the network must have a unique address that is not already assigned to another PCS, SUPERVISOR-PC unit, or PC unit with the 53WS5000 product package installed. 2. Set PCS database location B448 to the MicroLink mode (0, 1, 2, or 3). All nodes on the network must have the same mode selected. Mode 0 can not be used if a SUPERVISOR- PC unit or a PC unit with the 53WS5000 product package installed is on the network. 3. Select the desired peer-to-peer tasks as described in IB 53MC

17 Section 4. MicroLink Installation Figure 4-1. MicroLink Cabling Diagram 15

18 Section 4. MicroLink Installation Figure 4-2. MicroLink T-Configuration 16

19 Section 5. MicroLink Network Management 5.0 MICROLINK NETWORK MANAGEMENT The MicroLink nodes include various facilities for testing and maintaining the network. 5.1 SUPERVISOR-PC UNIT The SUPERVISOR-PC unit Configuration Panel (IB 53SU5000, Section 5) has been enhanced to show the current state of each node on a MicroLink network. The instrument address of each accessible node on the MicroLink network is shown on the network grid. If the number is displayed in white it indicates that the node is only accessible on Network A. If the number is displayed in yellow, then the node is only accessible in Network B. If the number is displayed in cyan, the node is accessible on both networks. Alarm messages are generated if a node s accessibility changes on either network. The normal INSXX UP/DOWN alarms have be augmented to show a B if the change occurred on Network B. 5.2 PROCESS CONTROL STATION The Process Control Station provides MicroLink network status information as follows: The System Status Display (Display 2), shows the MicroLink mode and instrument address of the node, as well as the status of the peer-to-peer tasks. If the PSTAT line indicates OK all peer-topeer tasks were completed on schedule. If it indicates BAD, one or more tasks failed to complete on schedule. The NET STAT line indicates A if the tasks can be completed on Network A, B if they can be completed on network B, and A B if they can be completed on either network. This display provides a quick way to tell if both networks of a redundant MicroLink are ready for communication. Additional information about the network can be obtained by looking at the following database parameters: B512 through B543 show the type of node that the PCS is detecting at addresses 0 to 31 on Network A. B544 through B575 show the type of node that the PCS is detecting at addresses 0 to 31 on Network B. Each parameter can have one of the following values: 0 = Node not accessible 7 = 53MC5000 Process Control Station 9 = SUPERVISOR Card (SUPERVISOR-PC unit or PC unit with 53WS5000 product package installed) 17

20 Section 6. MicroLink Troubleshooting 6.0 MICROLINK TROUBLESHOOTING In the event a problem should occur, check each item listed as follows: 1. Damaged Cables: Test each cable for opens and shorts using an oscilloscope. Ground the scope to ITB TB1 pin 5 of one terminator and observe the signals at TB1 pin 3 and pin 4. Both signals should be in the range of 1 to 4 volts with respect to pin 5 and should have a peak to peak amplitude of at least one volt. 2. Terminator Resistances: Networks with fewer than twelve nodes often require modifications to the terminators as stated in sub-section Configuration Settings: No two nodes can have the same address. All nodes must be set to the same MicroLink mode. The SUPERVISOR-PC unit, and PC unit with the 53WS5000 product package installed, must both be reset if the mode or address has been changed. It is not necessary to reset the Process Control Station after changing the mode or address. 19

21 Section 7. MicroLink Parts List 7.0 MICROLINK PARTS LIST Parts referenced in this Instruction Book are summarized in Table 7-1 as follows: Table 7-1. Parts List Part Number 686B599U01 686B619U01 686B622U01 686B626U01 161K228U17 161K228U24 677B943U01 677B943U02 677B943U03 677B943U04 677B943U05 677B943U06 677B943U07 677B943U08 Description PCS Communications Option Card MicroLink SUPERVISOR Board Communications ITB Redundant MicroLink SUPERVISOR Board Resistor, 470 Ohm Resistor, 910 Ohm 2.5 ft (0.8 m) Cable w/modular plug connectors 5 ft (1.5 m) Cable w/modular plug connectors 25 ft (7.6 m) Cable w/modular plug connectors 40 ft (12 m) Cable w/modular plug connectors 50 ft (15 m) Cable w/modular plug connectors 75 ft (23 m) Cable w/modular plug connectors 100 ft (31 m) Cable w/modular plug connectors 200 ft (61 m) Cable w/modular plug connectors 21

22 Section 8. Configuring the 53MC5000 PCS as a Gateway 8.0 CONFIGURING THE 53MC5000 PCS AS A GATEWAY This section contains information to interconnect a MicroLink and Datalink network via a 53MC5000 PCS configured as a gateway. It includes gateway overview information, and 53MC5000 PCS parameter entries for gateway functionality. It also includes parameter entries for the MicroLink SUPERVISOR-PC unit, External Input Module task entries for the 53MC5000 PCS modules on the MicroLink, parameter entries for the Datalink SUPERVISOR-PC unit, and cabling information MC5000 PCS GATEWAY OVERVIEW Prerequisites are a 53MC5000 PCS with Expansion Ready Capabilities (see sub-section 4.1.1) that has Extended Functionality, Enhanced Version Revision 2 Firmware, and MicroLink Revision 2 Firmware. Gateway capabilities are in addition to 53MC5000 PCS standard operation. The gateway can operate in Datalink interrogator mode or in Datalink responder mode. In Datalink interrogator mode, the gateway functions as the sole host on the Datalink network. Nodes on the MicroLink network transact with Datalink instruments via the gateway which initiates the interrogator/responder sequence. The Datalink nodes are passive and can not initiate peer-topeer network transactions but respond to queries from the gateway. Gateway functionality is transparent to the MicroLink nodes, as the Datalink instruments appear to be installed on the MicroLink network. In Datalink responder mode, the gateway functions to connect Datalink SUPERVISOR-PC unit or other host devices queries to MicroLink network nodes. The MicroLink network nodes can not initiate peer-to-peer transactions with Datalink nodes. This capability is still functional on the MicroLink network, as peer-to-peer transactions are not affected by the presence of a gateway on the MicroLink network. Every device on the combined Datalink/MicroLink network has a unique address, and only a single gateway can be connected to the same Datalink and MicroLink networks. (See Figures 8-1 and 8-2 for basic illustrations of gateway interrogator and responder network configurations.) Interconnecting MicroLink and Datalink networks via a gateway requires setting parameters in either the MicroLink SUPERVISOR-PC unit(s) (gateway as Datalink interrogator) or Datalink SU- PERVISOR-PC unit (gateway as Datalink responder), and the gateway. Also, the gateway must be cabled to physically connect both networks. 23

23 Section 8. Configuring the 53MC5000 PCS as a Gateway 8.2 CONFIGURING THE 53MC5000 PCS GATEWAY PARAMETERS To activate gateway operation in a 53MC5000 PCS, set the specified datapoint parameters (see IB 53MC5000, Section 3) as follows: 1. Set INSTRUMENT ADDRESS (IA) (B01) to a unique value for the combined Datalink/Microlink network. 2. Set BAUD (B02) to the appropriate data transfer rate index value of the Datalink network: B02 Baud Rate 9 28, , , , , , , Set MICROLINK COMM MODE (B448) to the appropriate data transfer rate index value of the MicroLink network: Mode Mbit/s Set NO PARITY (L256) as required for the Datalink network (default is EVEN PARITY). 0 for EVEN PARITY serial byte protocol. 1 for NO PARITY protocol. 5. Set DATALINK DISABLE (L257) to Set NO BYTE STUFF (L258) to Set GATEWAY MODE (L260) as required: 0 for Datalink responder mode operation. 1 for Datalink interrogator mode operation. 8. Set GATEWAY ON (L259) to 1. 24

24 Section 8. Configuring the 53MC5000 PCS as a Gateway PERFORMANCE TUNING Three additional parameters are used to tune the operation of the gateway. 1. Set DATALINK DELAY INDEX (B289). Normally the default value of 0 is sufficient. This value represents time in 10 ms increments and is only effective when the gateway operates in Datalink interrogator mode (L260 = 1). For Datalink networks with SCADA adapters, this value should be set to accommodate RTS-CTS delays of transmitted and received messages, as well as the data rate of the SCADA adapter RS232 port. (See IB 53SU5000, Section 2, for SCADA time-out calculation procedures.) 2. Set MICROLINK RETRY DISABLE (L262) to 1 to deactivate MicroLink gateway message retries. This value should normally be set to 0 when the gateway functions in Datalink responder mode. It should also be set to 0 if the gateway functions in Datalink interrogator mode and only one or two MicroLink SUPERVISOR-PC units are generating all of the messages; otherwise, it should be set to Set AUTO CONNECT DISABLE (L263) to 1 to deactivate automatic updating of the Datalink Node List (B608-B629) when the gateway is set up in Datalink interrogator mode. This parameter has no affect when the 53MC5000 PCS is configured in Datalink responder mode. 8.3 ACCESSING DATALINK INSTRUMENTS FROM MICROLINK NODES SETTING MICROLINK SUPERVISOR-PC UNIT PARAMETERS Prerequisites are SUPERVISOR board firmware must be revision 4.3 (or higher) and the 53MC5000 PCS gateway functions as a Datalink interrogator gateway. Two SUPERVISOR-PC unit parameters control MicroLink network operation: they are the Time Delays B04 through B07, and the Time Between Transactions value (ms) B08. For standard MicroLink or Datalink activity the default value of zero for these parameters is sufficient to ensure reliable communications. These parameters, however, must be modified to optimize communications when either Datalink network instruments are connected to the MicroLink network via a gateway, or when MicroLink network instruments are connected to a Datalink network via a gateway. Time Delays (B04-B07) control the response message timeout duration. The timeout duration can only be incremented in 10 millisecond intervals (e.g., 1 = 10 ms, 2 = 20 ms, etc.). Each Time Delay parameter (B04-B07) affects 8 instruments as follows: B04 applies to communications with instruments 0-7. B05 applies to communications with instruments B06 applies to communications with instruments B07 applies to communications with instruments For gateway operations, these values are other than 0 only if their corresponding instruments are accessed through the gateway. It should be noted that these parameters are also set for SCADA systems causing them to have values set to other than 0 even though their corresponding instruments are not accessed through the gateway. Time Between Transactions (B08) controls the minimum back-to-back transaction time of the MicroLink network. 25

25 Section 8. Configuring the 53MC5000 PCS as a Gateway Values for the Time Delays (B04-B07) and the Time Between Transactions (B08) are dependent upon the Datalink baud rate. For baud rates of 28.8 or 9.6 Kbaud, reference sub-section ; for all other baud rates, reference sub-section MICROLINK SUPERVISOR-PC UNIT PARAMETER REFERENCE TABLE If the Datalink network data rate is at 28.8 or 9.6 Kbaud, then the MicroLink SUPERVISOR-PC unit parameters B04 through B08 are set up as defined in Table 8-1. Values provided in Table 8-1 are initial settings that may require optimizing depending upon the MicroLink and Datalink applications. Table 8-1. MicroLink SUPERVISOR-PC Unit Values for B04 - B08 Datalink at 28.8 Kbaud: No. of SUPVRs Accessing Instruments via Gateway B04 - B B08 - Time (ms) Between Transactions Max. Gateway Accesses Per SUPERVISOR 70/sec 19/sec 11/sec Datalink at 9.6 Kbaud: No. of SUPVRs Accessing Instruments via Gateway B04 - B B08 - Time (ms) Between Transactions Max. Gateway Accesses Per SUPERVISOR 30/sec 11/sec 8/sec APPROXIMATING MICROLINK SUPERVISOR-PC UNIT PARAMETERS When accessing Datalink devices through the 53MC5000 PCS gateway for configurations not covered by Table 8-1, it is necessary to calculate the MicroLink SUPERVISOR-PC unit Time Delays (B04-B07) and Time Between Transactions (B08) values. Mathematical expressions to obtain these two values are as follows: Time Delay Value B04-B07 = (Transaction Time [see Table 8-2] + Instrument and Gateway Turn-around Time)/10 [Rounded up] Time Between Transactions B08 = [(10 X Time Delay Value) X (Number of MicroLink SUPER- VISOR-PC units - 1)] Table 8-2. Baud Rate - Transaction Time (ms) Kbaud Transaction Time (ms)

26 Section 8. Configuring the 53MC5000 PCS as a Gateway Example calculation: The MicroLink network has 3 SUPERVISOR-PC units that will access via the gateway (Datalink interrogator) instruments 9, 10, and 11, which are on the Datalink network operating at 28.8 Kbaud. For this example, B05 and B08 must be calculated. B04, B06, and B07 are each set to 0 because their corresponding instruments will not be accessed through the gateway or a SCADA system Kbaud Transaction Time ms (Table 8-2) Datalink Instrument and Gateway Data Turn-around Time 3.0* ms Total Transaction Time ms *Turn-around Time is the time in milliseconds for data to pass through the gateway to the instrument and back through the gateway again. This number is given as 3 ms and does not have to be calculated. For SCADA applications, Turn-around Time is 2.0 ms for the gateway plus SCADA time delays. See IB 53SU5000, Section 2, for SCADA time-out calculation procedures. Time Delay B05 = (Transaction Time [see Table 8-2] + Instrument and Gateway Turnaround Time)/10 [Rounded up] Time Delay B05 = (8.5 ms ms)/10, = 11.5 ms/10 = 1.15 ms rounded up to 2. (The Total Transaction Time of 11.5ms is greater than 10 ms; therefore, B05 is set to the next increment which is a 20 ms timeout. A value of 2 will be entered for the Time Delay B05.) B08 = [(10 X Time Delay Value) X (Number of MicroLink Supervisor PC units - 1)] B08 = [(10 X 2) X (3-1)] = 20 X 2 = 40 ms. In comparison to Table 8-1 at 3 MicroLink SUPERVISOR-PC units, values 2 and 39 would have been obtained for B05 and B08; whereas the calculated values are 2 and 40 respectively. The table and approximation calculation values differ slightly due to transaction time and turn-around time refinements used to prepare the table data. The calculated value for B08 is adequate as a close approximation (40 versus 39) because it may have to be altered to optimize network performance PCS EXTERNAL INPUT MODULE CONSIDERATIONS Prerequisite is that the gateway functions in Datalink interrogator mode. To minimize Datalink contention, the External Input Module (see IB 53MC5000, Section 4) of each 53MC5000 PCS on the MicroLink network must have task entries set to intersperse gateway with non-gateway peer-to-peer accesses or skip entries in the module if only gateway instruments are being accessed. The entries in a 53MC5000 PCS External Input Module are processed sequentially, one every 5 ms. The completion of the previous module entry is not required before the next module entry generates a message. Therefore, a 53MC5000 PCS may have 24 active messages on the MicroLink network at any given time. Gateway through-put (complete 1 message through the gateway) however, is 7.5 ms to 11.5 ms at 28.8 Kbaud, and 28 ms at 9.6 Kbaud Datalink data rates. At 28.8 Kbaud, if two messages were sent sequentially to destinations on the Datalink side of the gateway, the second message would not be passed through the gateway because it can only process one message at a time, which at 28.8 Kbaud requires up to 11.5 ms. 27

27 Section 8. Configuring the 53MC5000 PCS as a Gateway To reduce contention, messages from a MicroLink instrument or multiple MicroLink instruments, as applicable, should be balanced with respect to gateway through-put at the Datalink transfer rate. If the Datalink network transfer rate is at 28.8 Kbaud, the External Input Module entries of each node on the MicroLink network should limit accesses to gateway Datalink instruments to at least 3 entries apart (e.g., Tasks 0, 4, 8, etc.); and if the transfer rate is at 9.6 Kbaud, accesses should be limited to at least 6 entries apart (e.g., Tasks 0, 7, 14, etc.). 8.4 ACCESSING MICROLINK NODES FROM THE DATALINK SUPERVISOR-PC UNIT OR HOST SETTING DATALINK SUPERVISOR-PC UNIT PARAMETERS Prerequisites are SUPERVISOR board firmware must be revision 4.3 (or higher) and a 53MC5000 PCS functions as a gateway in Datalink responder mode. Datalink SUPERVISOR-PC unit Parameters B04 through B07 are each set to 3 when the corresponding instruments are on the MicroLink network, and B08 is always set to GATEWAY CABLING The gateway is cable connected to the MicroLink and Datalink networks for Datalink interrogator or responder mode operation as follows: MicroLink Connection - If the gateway is to be installed in Datalink interrogator or responder mode, connect it to the MicroLink network as illustrated in Figure 4-1. (Standard MicroLink cabling for a 53MC5000 PCS.) Datalink Connection, Datalink Interrogator Mode - If the gateway is to be installed in Datalink interrogator mode, connect it to the Datalink network as illustrated in Figure 8-3 for cord set rear terminal board units or Figure 8-4 for standard rear terminal board units. (Reversed Datalink cabling for a 53MC5000 PCS.) Proper cabling of the gateway in Datalink interrogator mode is just like a Datalink SUPERVISOR-PC unit: the T+ and T- of the gateway are wired to the R+ and R- respectively of the other Datalink instruments. The transmitted signals of the gateway (gateway T+ T-) are received by the instruments (instrument R+ R-), and the transmitted signals of the instruments (instrument T+ T-) are received by the gateway (gateway R+ R-). Datalink Connection, Datalink Responder Mode - If the gateway is to be installed in Datalink responder mode, connect it to the Datalink network as illustrated in Figure 8-5 for cord set rear terminal board units or Figure 8-6 for standard rear terminal board units. (Standard Datalink cabling for a 53MC5000 PCS.) 28

28 Section 8. Configuring the 53MC5000 PCS as a Gateway Figure 8-1. Gateway As Datalink Interrogator Figure 8-2. Gateway As Datalink Responder 29

29 Section 8. Configuring the 53MC5000 PCS as a Gateway Figure 8-3. Datalink Interrogator Gateway Installation (Cord Set) 30

30 Section 8. Configuring the 53MC5000 PCS as a Gateway Figure 8-4. Datalink Interrogator Gateway Installation (Rear Terminal Board) 31

31 Section 8. Configuring the 53MC5000 PCS as a Gateway Figure 8-5. Datalink Responder Gateway Installation (Cord Set) 32

32 Section 8. Configuring the 53MC5000 PCS as a Gateway Figure 8-6. Datalink Responder Gateway Installation (Rear Terminal Board) 33

33 MicroMod Automation, Inc. 75 Town Centre Drive Rochester, NY USA Tel Fax The Company s policy is one of continuous product improvement and the right is reserved to modify the information contained herein without notice, or to make engineering refinements that may not be reflected in this bulletin. Micromod Automation assumes no responsibility for errors that may appear in this manual MicroMod Automation, Inc. Printed in USA