mikeexplorer
Supporting Member
I have a spare Micrologix 1400 Series B I bought used on Ebay awhile back. I had thought of it as a spare PLC for my train project but I screwed up on the model number as it does not have the analog I/O built in. I tested it and everything works on it.
I saw a thread about Modbus communication and I may be doing a project in the future at work where I will need to use Modbus but I don't have any experience with it. I bought a cheap relay board to start learning.
My question is, Is it possible to use the DB8 serial port (comm port 2) for Modbus? I want to reserve the round port (comm 0) for an HMI panel which I have a used spare. The panel does not have ethernet (Its an automationdirect EA9) I saw on one website where it said I could use Com 2 but I have to make my own cable. I can't find a diagram for this cable.
Mike
I saw a thread about Modbus communication and I may be doing a project in the future at work where I will need to use Modbus but I don't have any experience with it. I bought a cheap relay board to start learning.
My question is, Is it possible to use the DB8 serial port (comm port 2) for Modbus? I want to reserve the round port (comm 0) for an HMI panel which I have a used spare. The panel does not have ethernet (Its an automationdirect EA9) I saw on one website where it said I could use Com 2 but I have to make my own cable. I can't find a diagram for this cable.
Mike