[RS485 communication with Mayekawa CP IV with V1210]

Hi Ausman, Sorry for the mishandling of the page I did not want to report your comment.
I reported it without realizing it, I'm very sorry.

I was asking him how to do the communication work first on the PC.

 

Sorry mr Ausman😔

[RS485 communication with Mayekawa CP IV with V1210]

Hello, thank you very much for your prompt response Gentlemen.
I want to thank AlexUT for providing the correct MAYEKAWA CP IV controller manual.
According to wiring it should be like the first image:

The data flow should be as follows but I am not very clear about this form of data flow, could you explain to me how to do it?

 

The number references should be the following, but I have called them decimal or hexadecimal but without success.

If you want to see the manual I will leave it here, again thanking AlexUT.

488091769_MayekavaMYPRO-CPIV_Manual-pdf-free.pdf

[RS485 communication with Mayekawa CP IV with V1210]

Hi Joe T, thanks for your quick response.

 

The MAYEKAWA processor manual link is here https://qdoc.tips/cp4-mycom-manual-pdf-free.html.

According to the document, it is possible, but I get an error when doing the holding registers.

[RS485 communication with Mayekawa CP IV with V1210]

Hi everyone.
I have tried to communicate with a MYCOM compressor that has a MAYEKAWA controller which in the manual says that it allows RS485 communication, I have been trying for 3 days without success.
The MAYEKAWA controller detects the requests made by the V1210 but when returning the information it arrives with a 5 in the message status.