Polarless control of compressor switching
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For reciprocating compressors equipped with a stepless control system, one of the procedures for switching their operation is as follows: \"The operator gradually increases the load until it approaches the output value of 100-PIC0702.\" Among them, PIC0702 is a two-stage compression primary outlet pressure controller. What I would like to know is what the output value of PIC0702 is when it approaches 100?
It depends on the configuration logic here. When you set PIC0702 to automatic mode, it will calculate an MV output value based on the PV and SV values. At this time, the operator panel is in manual mode. I’m not familiar with your specific configuration logic, so I’ll make an assumption: when the value displayed on the operator panel matches the MV output value, setting the operator panel to automatic mode results in the most stable performance with the least fluctuations. In fact, it can be controlled entirely using a manual controller; if automatic operation is desired, it is necessary to first perform conversion calculations and determine the MV value of PIC0702. Specifically, you don’t have any configuration logic either, so I can’t explain it clearly.