Issues with constant liquid level control settings for ABB frequency converters
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I am using the built-in PID function of theABB ACS800 inverter for constant level control, and it is working well currently. However, I am concerned that if the local level gauge breaks or malfunctions and no current is generated, the pump will not be able to start. May I ask in which parameter menu should this setting be made to control the pump to operate at the power frequency when process measurement values cannot be detected?
Ugh, I gave away all the ABB manuals I organized some time ago; please help out. . . . .
I hope the original poster can share the process of solving it for everyone to learn from*. Also, in the AC electrical section, there is the ABB AC800F manual that I uploaded; it can be found by searching
Since the frequency conversion control cabinet did not have a design for manual/automatic frequency switching in the initial stage, the start and stop of the frequency conversion is controlled via the on-site liquid level transmitter, regardless of whether it is in manual or automatic mode. The built-in PID function of the frequency converter is used; there is no PLC or DCS. It operates in a manner similar to constant-pressure water supply systems. There is concern that a power failure or malfunction of the on-site level gauge could prevent the frequency-controlled pump from starting. ABB ACS 800 Manual 30.01AI
Because we don’t understand the instruments for these variable-frequency power return pipes.
It was a small retrofit project, so the instrumentation and electrical systems were handled together