Programming PLC to Recognize Standby and Rut Mode
Programming PLC to Recognize Standby and Rut Mode
(OP)
Hello All,
Thank you for reading my post. I'm attempting to figure out how to determine whether a pump is in standby or rut in the PLC control logic for a water management system. This is what the client explicitly asked for. The pump motor is interlocked with the discharge valve so the pump must turn on before the valve begins to open. Since the pump will experience an inrush of water from the reservoir, it must constantly be pumping water while its running. If it's in standby mode, then the motor would have to be off, but ready to start. I'm assuming this is correct, but I would appreciate a second opinion to confirm it.
In addition, I am not familiar with the rut status of a motor. What exactly does that mean? Does it mean it's running but not transmitting energy to the water? If someone could define that for me, I would be extremely grateful. If my definition is correct, I do not understand how the PLC knows if the motor is in rut without sensing a current or voltage; The only switches I have access to is the running switch from the motor controller and the open and closed limit switch of the discharge valve. I'm almost done with this project and I just need a bit of a push forward to figure out this logic, so your help would be greatly appreciated.
In case it's relevant, I'm using TIA portal version 13 step 7, PLC sim version 13 and WinCC step 7 version 13.
Much Appreciated,

Hardcore_Learnee22





RE: Programming PLC to Recognize Standby and Rut Mode
Regarding " I do not understand how the PLC knows if the motor is in rut without sensing a current or voltage;"
Many systems that are not critical do not have inputs to prove the operation. A pump will just turn on and run. The plant operator will verify operation.
RE: Programming PLC to Recognize Standby and Rut Mode
The normal switch settings are RUN-OFF-AUTO or HAND-OFF-AUTO. Until you get this absurd "rut" corrected we are all going to have a hard time helping you.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Programming PLC to Recognize Standby and Rut Mode
TTFN
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RE: Programming PLC to Recognize Standby and Rut Mode
Best,
HardcoreLearnee22