Host Engineering Forum

General Category => Do-more CPUs and Do-more Designer Software => Topic started by: Bobby on September 20, 2016, 08:35:08 AM

Title: Talking between 3 PLC's
Post by: Bobby on September 20, 2016, 08:35:08 AM

Hello all,

    Trying to future-proof some of my new do-more projects and being new to PLC programming I am looking for some solid direction.
    We have a production line that runs 3 PLC's. Currently I am using PEERLINK to pass data and even using it as bit status 1=ON 0=OFF.
    This is working okay but I am thinking ahead when we may possibly have 2 lines side by side on the same network. What are some other ways to pass data easily between PLC's with a little more control over the destinations?

Title: Re: Talking between 3 PLC's
Post by: Greg on September 20, 2016, 09:07:05 AM

If all the PLCs are Do-more, then a very easy way to send data back and forth is with the RX and WX instructions (these require the built-in Ethernet port). If all the PLCs are not Do-more then it may be better to use Modbus RTU (built-in serial port or H4-SERIO/SERIO4 module) or Modbus TCP (built-in Ethernet port).

Title: Re: Talking between 3 PLC's
Post by: Bobby on September 20, 2016, 11:47:23 AM

Thanks Greg! I will look into using the WX & RX commands!