OPERATOR INTERFACE PRODUCTS APPLICATION NOTE

Transcription

1 Subject: Schneider Modbus RTU to Zelio 2 SR3 using GP-Pro PBIII AN# 1137 Rev A Date: 08/20/2005 Name: Bjorn den Dunnen Page: 1/8 : This application note shows how to set up a Modbus RTU connection between a Pro-face GP, GLC or ST using the Schneider Modbus RTU 1:n comm. driver in GP-Pro PBIII and Zelio SR3 system using the SR3-MBU01BD communication module. Within the scope of this application note the terms ST, GP and GLC can be read as applying to any ST-400, ST-403, GP-2000/1 and GLC-2000 series hardware without exceptions unless noted otherwise. Contents 1) Cable Diagrams (ST-400 or GP/GLC-2000 Series to 1 Zelio 2 SR3-MBU01BD) 2) Communication Settings 3) Addressing 4) Codes 5) Disclaimer 1) Cable Diagrams Cable Diagram 1: ST-400 or ST-403.

2 Cable Diagram 2: GP-2x00, GP-2x01 and GLC-2x00 Series. 2) Communication Settings 1) Make sure you are using GP-Pro PBIII v7.x C-Package 03 (for details see Help, About ) 2) In the Project Manager select Schneider Electric. and Schneider Modbus RTU 1:n comm.

3 3) In GP Settings on the Mode Settings tab select Modbus Config. 4) On the Extended Settings tab select System Area No. of Nodes Number of Zelio nodes (1-31) Node No. This number is used in your GP-Pro project as #_ prefix to the plc registers you enter. (See Addressing for details) Modbus RTU Address This setting is your actual Zelio 2 Modbus address. Enter a different Modbus RTU Address for each Zelio in the Node No. list. Uncheck all selected items to prevent unwanted GP/ST to Zelio communication. For details on the functions of the ST System Area refer to the PLC connection manual.

4 2) Communication Settings (continued) 5) Go to the Communication Settings tab Use the following settings and make sure to match these setting in your PLC setup: GP-Pro PBIII Communication Settings ( GP Setup, Communication Settings ) Zelio Soft 2 Communication Settings ( Edit, Program Configuration, Modbus Extension ) Note: Baud Rate and Parity Bit can be changed as long as the settings match.

5 3) Addressing The GP-Pro driver used is a generic Modbus RTU driver, not designed for Zelio 2 I/O specifically. N = Node 1-31 N = Node 1-31 D = 4 Holding Register D = 4 Holding Register A = Zelio 2 Address + 1 A = Zelio 2 Address + 1 B = About the address offset Modbus addressing is offset by 1: to read address 10h (16d) use N_ Reading / Writing an Integer value (assuming 1 PLC, Node number 1) Zelio 20h (32d) = 1_ Reading / Writing 1 bit in an Integer value (assuming 1 PLC, Node number 1) Zelio Run/Stop = 1_ Below is a simplified view of the Zelio Soft 2 FBD editor showing the JnXT1 input form the GP/ST to the Zelio and the OnXT1 output from the Zelio to the GP/ST. (note that your are not required to send the data from the input directly to the output, the data flow below is used to illustrate the relation of J and O)

6 3) Addressing (continued) Address Range: The Zelio 2 SR3-MBU01 allows you to read/write bit registers with predefined functions. Note that the SR3-MBU01 module cannot be used in combination with all Zelio modules. NOTE: The JnXT1 and OnXT1 addresses can only be used in FBD mode, LD cannot be used. This only affects the Input/Output registers, in LD mode the Clock and Status can still be used. Refer to your Zelio Soft 2 documentation for details on how to work with the Input and Output areas. Zelio GP-Pro Read/Write Function Illegal <= 1_ n/a Illegal Address, 02:02 error on read and write 10h / 16d 1_ R/W Output to Zelio J1XT1 (FBD mode only) 11h / 17d 1_ R/W Output to Zelio J2XT1 (FBD mode only) 12h / 18d 1_ R/W Output to Zelio J3XT1 (FBD mode only) 13h / 19d 1_ R/W Output to Zelio J4XT1 (FBD mode only) 14h / 20d * 1_ R/W Input from Zelio O1XT1 (FBD mode only) 15h / 21d * 1_ R/W Input from Zelio O2XT1 (FBD mode only) 16h / 22d * 1_ R/W Input from Zelio O3XT1 (FBD mode only) 17h / 23d * 1_ R/W Input from Zelio O4XT1 (FBD mode only) No data 1_400025~32 R Read Only (No Data), 02:02 error on write 20h / 32d 1_ R/W Clock 21h / 33d 1_ R/W Clock 22h / 34d 1_ R/W Clock 23h / 35d 1_ R/W Clock No data 1_400037~48 R Read Only (No Data), 02:02 error on write 30h / 48d 1_ R/W Status Illegal >= 1_ n/a Illegal Address, 02:02 error on read and write * NOTE: the Zelio Soft 2 v2.4 English manual states that the O1XT1 O4XT1 addresses can be found in addresses 0000h 0003h. Instead use the addresses shown in the table above.

7 4) Codes General of ST error codes showing up in the lower left hand corner of the screen: 02: : = the standard prefix for a plc communication error :XX: = the actual error code, refer to the list below for details : :### = the Node Number of the PLC to which the error applies 02:FF.### (PLC Not Connected) There is no communication with the PLC - There has been no communication with the PLC for x seconds. - The communication cable is unplugged / wrong / damaged on the ST side. - The ERA / CSA and / or ERB / CSB lines are not connected loop on the ST side cable 02:FE.### (PLC Not Responding) The ST has successfully sent a message but there is no reply from the PLC. - A & B lines in the cable are disconnected or connected wrong. - The communication settings on ST do not match those on the PLC - The PLC Node number does not match the setup on the ST - When powered up simultaneously the ST tries to communicate before the PLC is ready. If it is go to GP Setup on the GP Settings tab add a value in the Com Port Startup Delay field. When powered up simultaneously the ST will now wait x seconds before trying to establish communication. 02:FD.### (Receive Data ) The ST and PLC are communicating but cannot interpret the data received - During normal communication one of the peers fails, cutting a message short - Parity settings, Start / Stop bit setup mismatch between ST and PLC 02:FB.### (PLC Com. ) The ST and PLC are communicating but the PLC cannot write the data - Your are trying to write an integer value to a 3 register - Your are trying to set, reset or toggle a bit in a 1 register 02:02.### (PLC Com. ) Communication is established but a PLC address is illegal - An address is out of range (see addressing) - Address type in the GP-Pro editor is not according to addressing convention: check the Symbol Editor to see if there are any unassigned (and unintended) symbolic names. 02:01.### (PLC Com. ) Illegal Command Code - Trying to read an Input Register (3) device instead of 4 (Output Register)

8 5) Disclaimer All company, product, model and brand names used in this application note are the property of their respective owners. For this application note the following hardware was used: - Zelio 2 SR3-B101BD (SW , HW , FW 2.19) - Zelio 2 SR3-MBU01BD (SW 1.1, HW 1.0) - Zelio Soft 2 v2.4 - GLC2300-LG41-24V - GP2600-TC41-24V - GP-Pro PBIII v7.21 ML