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Control an Adam industrial scale via its RS232 serial port

In this example, we’ll connect a ACE PLC to an Adam CPWplus75 lab scale.


The Scale to ACE connection involves 3 wires.

  1. GND to GND
  2. Tx to Rx
  3. Rx to Tx


The following ACE program implements 5 of the industrial electronic scale’s functions

  • Tare/Zero – which sets the zero weight, so that you can measure things inside a container and not the container itself.
  • Hold – holds the last value for a period of time
  • Read Net Weight
  • Read Gross Weight
  • Read Tare Weight

Download the Program :