Table 1 shows the I/O address assignment table for this example, while Figure 2 illustrates the connection diagram from the PLC to the VS drive’s terminal block (TB-1). Figure 1 – Operator station for a variable speed drive The PLC program will contain the logic to start, stop, and interlock the forward/reverse commands. The required input field devices (i.e., start push button, stop push button, jog/run, and forward/ reverse) will be added to the application and connected to input modules, rather than using the operator station’s components.
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