11/22/2021 2:44 PM | |
Posts: 10 Rating: (0) |
Hello! I am using Cp341 6ES7341-1CH02-0AE0 as modbus slave rs485 two wire.The dongle I am using is 6es7870-1ab01-0ya1. With the help og user program I have created a program in my PLC s7400H and I am using Step7 v5.5 sp4. I could not able to establish the communication. I am checking my plc slave data in modbus simulator modscan where the message is showing recieved invalid response to modbus query( attached pictures). I am using FB80 and called it in OB1 and assigned the parameter as well( attached the project for refrence). the wiring for cp is 4 , 11 and 8. When I connect my simulator.in cp card only rx light is blinking but no tx light is blink. Could anyone please suggest what I am doing wrong or what would be the possible solution. Please dwonload the project from the below link. [snip] AttachmentFiles.zip (343 Downloads) |
Last edited by: Jen_Moderator at: 11/23/2021 09:24:14Removed links and added files as an attachment. |
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11/23/2021 3:31 PM | |
Joined: 3/5/2014 Last visit: 8/5/2022 Posts: 5521 Rating: (1054)
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hi farhanmaq092618, do your blocks give any error-message. Have a look how to evaluate the status of the blocks: How do you evaluate the status of system blocks in STEP 7 (TIA Portal)?Step7 help or documentation of the block-library usually consists information about the error numbers, regards, |
FCK WAR! |
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11/24/2021 10:05 AM | |
Posts: 10 Rating: (0) |
Hello! No, there is no error showing in the block and cp start status is showing ok and error bit is also false. |
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