I'm having some difficulty getting this to work. There's not really a example guide that I found to follow
I picked up a I/O module (16in,16 out) that does modbus over rs485.
I've tried a few ways and I seem to get even more confused. I understand the product datasheet, i just don't understand how to set it up in ladder. The problem is I want to use ladder logic on the Opta to learn ladder for work here's where I'm at it wouldn't surprise me if it's all messed up
I tried looking at axles logiclab manual and they don't seem very good at giving examples...
The forum made me add this in a separate post
I've since gotten a USB to rs485 to snoop the bus.
The Opta sends data that is nowhere close to anything I enter, I can sent the slave Id to anything in Arduino plc and the output on the rs485 bus is always addressed to slave 0. I can disconnect the Arduino opta and use the USB to rs485 to send the commands to the io board and it works perfectly.
So let's start with how do I get modbus to write to the correct slave. Whose id that was set in the project resources window's fc06 device or even custom modbus device. Or even set alternatively as part of a ladder block. Or even set both ways :-/
