PmpPid (FB)

FUNCTION_BLOCK PmpPid EXTENDS AbbLConC3

The function block PmpPid is used for closed loop control of pressure or flow in the network. The function block receives the set value and actual value from the process and does the closed loop control. The function block is used to control pressure or flow when the input ProcessMode of function block PmpConfiguration is selected as either pressure control (1) or flow control (2) in the multi pumping and traditional pumping station.

Note

This function is not used on DOL pumping stations.

• Overview of PmpPid is explained in the above image.

InOut:

Scope	Name	Type	Initial	Comment
Input	SetValue	REAL	1.0	2: Set value of the process variable in terms of real values, e.g. bar for pressure, m3 per hour for flow. Range- Value>0.0
	ActualValue	REAL	0.0	3: Actual value of the process variable in terms real values, the unit must be same as SetValue. Range-Value>=0.0
	Kp	REAL	0.1	4: Proportional gain of the Pid. Range-Value>0.0
	Tintegral	REAL	1.0	5: Integral time of the Pid in terms of seconds. Range- Value>0.0
	Tderivative	REAL	0.0	6: Derivative time of the Pid in terms of seconds. Range- Value>=0.0
	Reset	BOOL	FALSE	7: Resets the I output of the Pid, works as AntiWindUp.
	YOffset	REAL	0.0	8: Adds the Offset to the Pid output. Range-[0.0 to 200.0]
	PidMaxLimit	REAL	100.0	9: Limit for the maximum Pid Output. Range-[0.0 to 200.0]
	PidMinLimit	REAL	0.0	10: Limit for the minimum Pid Output. Range-[0.0 to 200.0]
	MasterPump	INT	1	11: The master pump in sequence - The output of the PmpSequenceGen control function. Range-[1 to 4]
	SleepBoostRef	REAL	0.0	12: Input SleepBoostRef need to be connected to the output of the PmpSleep FB. Range-Value>=0.0
	SleepStatus	INT	0	13: The Input SleepStatus value: Range-[0 to 3] 0- iNumberOfPumpActive. 1- Boost Activated. 2- Sleep mode active. 3- Wakeup function active.
	ProtectionShutdown	BOOL	FALSE	14: Digital signal from the protection function block to shutdown the pump station.
	AntijamStatus	ARRAY [1..4] OF INT	[4(0)]	15: Status of the Antijam proces. This input must be connected to the output of PmpAntijam FB. Range-[0 to 2] 0- Not started. 1- Busy. 2- Done.
	SoftfillStatus	INT	0	16: Output of the SoftfillStatus shows: Range-[0 to 4] 0- Disable the soft fill. 1- Ready to Start. 2- SoftFill in progress. 3- SoftFill completed. 4- SoftFill with Fault.
	TradMasterTrip	BOOL	FALSE	17: Input to define the trip status of master pump in the Traditional pump combination. To attach this input with the TradMasterTrip output of PmpSequenceGen FB.
	PmpStationParameters	PmpStationType		18: Pump Station structure which stores pumping station data.
Output	ErrorID	ERROR_ID		3: Error code in case of error in the function block execution.
	PidOut	REAL	0.0	4: Pid output after the manipulation in terms of percentage. Range-Value>=0.0
	PidDeviation	REAL	0.0	5: Deviation of Set value from actual value. It is also known as Pid error. Range-Value>=0.0
	MaxLimitReached	BOOL	FALSE	6: Indicates if the Pid output touches the PidMaximumLimit.
	MinLimitReached	BOOL	FALSE	7: Indicates if the Pid output touches the PidMinimumLimit.

Methods:

A_StartAction

B_CyclicAction

C_CleaningAction

D_AbortAction

E_ResetAction

Structure:

• PmpPid.A_StartAction (METH)
• PmpPid.B_CyclicAction (METH)
• PmpPid.C_CleaningAction (METH)
• PmpPid.D_AbortAction (METH)
• PmpPid.E_ResetAction (METH)