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Help to connect SENTRON PAC 3200 with CPU S7-1200 through MODBUS TCP on TIA V14

Created by: NADER BHS at: 7/27/2017 1:04 PM (32 Replies)

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7/27/2017 1:04 PM	Rate (0)
NADER BHS Posts: 85 Rating: (0)	Hello, This is my first time to use the SENTRON PAC 3200 and the ModbusTCP protocol. I'm on TIA PORTAL V14 trying to collect data from a SENTRON PAC 3200 through Modbus TCP. I'm using the MB CLIENT fonction: REQ :TRUE DISCONNECT : FALSE CONNECT ID : 1 IP OCTET 1 : 192 IP OCTET 2 : 168 IP OCTET 3 : 0 IP OCTET 4 : 5 IP PORT : 502 MB MODE : 0 MB DATA ADDR : 40002 MB DATA LEN : 100 MB DATA PTR : db_buff The problem is that I didn't recieve data on the db_buff and the bit of ERROR on the MB CLIENT function is activated. The STATUS is : 80A5
NADER BHS Posts: 85 Rating: (0)	Last edited by: nader_bhs_cmi at: 7/27/2017 1:04:46 PM
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7/27/2017 2:30 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (324)	Hello nader_bhs_cmi, error 80A5 means that this connection ID is already in use. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (324)
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7/27/2017 2:58 PM	Rate (0)
NADER BHS Posts: 85 Rating: (0)	Hi Kaulquappe, I have just one simple PAC3200 to connect with a CPU S7-1200. the S7-1200 is related with the PAC3200 through a switch D-Link DES-1005A from its ethernet ports. I have also related my computer to the same switch so I can modify and load the program to the PLC. I this case how can the connection ID be already in use? Is there any suggestion to change the ID ? Regards.
NADER BHS Posts: 85 Rating: (0)
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7/27/2017 3:03 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (324)	Hello nader_bhs_cmi, the connection ID is an input at MB_CLIENT and it is used by the CPU internally to identify a logical connection. So if any other communication is running in your project you must make sure that the connection ID is unique. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (324)
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7/27/2017 3:18 PM	Rate (0)
NADER BHS Posts: 85 Rating: (0)	Hi Kaulquappe, I've affected the DONE output from the MB_CLIENT to an output Relay (Q0.0) on the PLC program, Then I've tried to connect the pac3200 directly to the s7-1200 from its ethernet ports, but still no respond from the pac3200. PS: The hole program is on OB1. Regards, Nader
NADER BHS Posts: 85 Rating: (0)
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7/27/2017 3:58 PM	Rate (0)
NADER BHS Posts: 85 Rating: (0)	Hello, Would you please suggest me a sample containig s7-1200 and pac3200 modbus connection on tia v14 based on ladder language. Regards, Nader
NADER BHS Posts: 85 Rating: (0)
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7/27/2017 4:08 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (324)	Hello Nader, I'm sorry, I haven't got a sample. Which MB_Unit_ID do you use? It is a common handling error to use 255. This one is not supported by PAC3200. I recommend to use 1. Evaluate the outputs of MB_Client in your program. Save STATUS when ERROR=TRUE. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (324)
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7/28/2017 3:17 PM	Rate (0)
NADER BHS Posts: 85 Rating: (0)	Kaulquappe Hello Nader, I'm sorry, I haven't got a sample. Which MB_Unit_ID do you use? It is a common handling error to use 255. This one is not supported by PAC3200. I recommend to use 1. Evaluate the outputs of MB_Client in your program. Save STATUS when ERROR=TRUE. Regards, Kaulquappe Hello Kaulquappe, As I mentionned on my first post, the MB_Unit_ID (or CONNECTION_ID) is 1. When I put 255 on the CONNECTION_ID the STATUS changes to 818C and the ERROR stay activated. I use the CPU1212C AC/DC/RLY 212-1BE31-0XB0 may be it doesn't support the modbus tcp connection... I have joined a capture of the function. Regards, Nader Attachment mb client.jpg (492 Downloads)
NADER BHS Posts: 85 Rating: (0)
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7/28/2017 3:39 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (324)	Hello Nader, you are mixing up things. The connection ID is only used CPU internal. The Parameter MB_Unit_ID in the instance DB is the Unit ID sent to the PAC. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (324)
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This contribution was helpful to 1 thankful Users NADER BHS

7/29/2017 10:34 AM	Rate (0)
NADER BHS Posts: 85 Rating: (0)	Kaulquappe Hello Nader, you are mixing up things. The connection ID is only used CPU internal. The Parameter MB_Unit_ID in the instance DB is the Unit ID sent to the PAC. Regards, Kaulquappe Hi Kaulquappe, Thank you for the clarification. I have modified the MB_Unit_ID from 255 to 1 but still no responnd from the PAC3200. in the attachment I have joined captures of the actual values of the instance DB of my MB_Client fonction. Please let me know if there is any other parameter to change. Regards, Nader Attachment instance DB capture.zip (427 Downloads)
NADER BHS Posts: 85 Rating: (0)	Last edited by: nader_bhs_cmi at: 7/29/2017 11:14:38 AM
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