Ok I figured out why I was timing out, I was using the wrong setting on my cable. Thank you danw2 for explaining about the two leading digits, my manual mentioned nothing about them being the command code. I can now successfully query my PLC with Modscan32.
Hi I am trying to get modbus RTU working with my Idec pentra (FC5A)but I'm having a few problems. My biggest is that the modbus address for my data registers are bigger than any simulator takes i.e. modscan32. for example i want to read register d7555 which modbus address is 407556 according...