TF3685 | TwinCAT 3 Weighing Library

The TwinCAT 3 Weighing PLC Library makes it possible to integrate a scale for weight measurement into the PC-based machine control system – particularly in conjunction with the I/Os of the ELM35xx and EL3356 EtherCAT Terminals. The focus is primarily on the dynamic weighing process. Signal filtering is particularly demanding here, as the weighing time has a significant influence on the overall processing time of the machine. Rapid signal filtering with the same level of precision produces a faster weight result, which ultimately makes for faster machines.

Since a load cell and a measured value acquisition via the corresponding EtherCAT Terminals do not yet constitute a scale, this is exactly where the PLC library comes in. It can also be used to connect several load cells together to form a complete scale. What’s more, it even takes over the scaling of the measured values, while the new PLC function blocks cover functions such as zeroing and taring. In addition to manual triggering of the weight measurement, automatic measurement is also possible. The production material is detected and the measurement is taken directly. The main advantage here is the ability to work without external triggers, such as photoelectric sensors and initiators.