4/18/2023 1:34 PM | |
Joined: 3/20/2023 Last visit: 8/29/2024 Posts: 1 Rating:
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Hello, I'm trying to connect a LOGO! BM to a Sentron PAC3100 using a LOGO! CIM to obtain the voltage from the L1_N, L2_N... etc. In one hand, I'm using the LOGO! BM as the S7 server and the LOGO CIM as the S7 client. I don't think there is any problem with that since there is a checkmark on the web interface of the CIM indicating a correct connection of this. On the other hand, I configure the CIM as the Modbus master and the PAC3100 as the slave (there was no other choice, the PAC3100 only works as Modbus slave) using RS-485, and I can't visualize any value on the LOGO! BM. The communication parameters such as the Baud rate, type of transmission and Modbus slave address matches with the PAC3100. I tried to see if the CIM was receiving data from the PAC3100 using this address https://192.168.0.80/pi/rest/vu0 but I got a 0 indicating that there is no data transmission from the PAC3100. Also, I noticed that the yellow Led of the PAC3100 that indicates data transmission never turns on. Here is the data transfer on the CIM for the Modbus communication. And this is the program on the LOGO! BM The S7 configuration on the LOGO! BM And the S7 client configuration on the CIM. I already tried using this example from Siemens: LOGO! CIM - Modbus RTU communication with SINAMICS V20 - ID: 109806055 - Industry Support Siemens but still can't make this to work. I think it could be something with the Modbus Register address from the PAC3100 or the size of the information since we get Dword from this device and I don't know how to tell the CIM the size of the information that is receiving. If anyone knows how make this or I missed some information, please let me know |
Last edited by: Jen_Moderator at: 04/19/2023 08:50:34Text formatting optimized. |
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