Kunker

Hello! I am trying to create a program that will, allow to read Output, Input, Analog statuses and also Enable/Disable Outputs. I have a working program created and it works very well through RS232, however I need to use RS485. My problem is that I can send data through RS485, but i cannot receive. For example by sending the characters through RS485 "OS" the PLC gets the request but replies through RS232 not RS485. P.S. By sending the characters "OS" I should get a reply that displays all the Output Statuses. I have added my program in the attachment. PLC Projekts.U90

Thanks! I built my own cable and it is working now! Turns out the JZ PRG needs external power 9V @ 0.15 . But for some reason on my PLC I'm getting SMS Error 3 which means it doesn't recognize the message that the modem sent. I have checked and sent some AT commands to the modem using realterm and it responds as expected. Any ideas?

I need the MJ10-22-CS26 pinout so I can create an RJ12 to Male DB9 cable for PLC to Modem communication.