DMC recently discovered that there are some unique settings associated with configuring a Siemens G120 Variable Frequency Drive (VFD) with extended safety functionality using the onboard terminals. This blog is meant to be a guide for this type of configuration to avoid troublesome and difficult-to-diagnose issues.
In this particular situation, we used an S7-400H PLC to control a CU240E-2 VFD. The S7-400H can be configured with two CPUs in a fully redundant PLC setup, b...
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