I know that there are many topic but none helped me.

I have a CPU 1515-2 PN and a CM PtP RS 422/485. I want to read some data from third party device on modbus rtu. 

My cm settings are: rs485, Freeport/modbus, 9600 baud rate, even parity, 8 bits data and 1 stop bits.

My modbus comm load block has set mode to 4, done bit is false and status is 7000. On req has FirstScan input.

My modbus master block has status 80c8. 

I have checked the settings on modbus slave and are the same as on cm.

What can I do to get the communication working?

Hi!!

I am also facing same issue; did you get any solution?