Laboratory Scale – How to control an Adam Equipment Industrial Scale with a PLC
In this example, we’ll connect a Velocio PLC to an Adam Equipment CPWplus75 lab scale.
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Wiring
The Scale to PLC connection involves 3 wires.
- PLC ground to Scale ground
- PLC Tx to Scale Rx
- PLC Rx to Scale Tx
Programming :
The following PLC program implements 5 of the industrial 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 : ScaleFunction.zip
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