Yaskawa iQpump Programming Manual - Manual (Page 135)

YASKAWA TM.iQp.02 iQpump Drive Programming Manual 135
The iQpump drive can be configured to allow a maximum number of cycles before initiating a “Pump Over Cycle Fault (POC).” The
drive will determine the maximum number of cycles based on the programmed number in the Sleep Mode: Cycling Protection (P2-06).
One cycle is defined by the drive transferring from normal operation to sleep mode when operating in the Auto Mode. A value of 0
programmed into the Sleep Mode: Cycling Protection (P2-06) will disable this function.
The maximum time allowed between cycles can be programmed in the Sleep Mode: Maximum Cycling Protection Time (P2-07).
The Sleep Mode: Cycling Protection (P2-06) works in conjunction with the Sleep Mode: Maximum Cycling Protection Time (P2-07).
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P2-07 Sleep Mode: Maximum Cycling Protection Time
Setting Range: 0 to 3600 sec
Factory Default: 300 sec
The iQpump drive can be configured to allow a maximum number of cycles before initiating a “Pump Over Cycle Fault (POC).” The
number of cycles allowed is determined by programming the Sleep Mode: Cycling Protection (P2-06). The maximum time allowed
between cycles can be programmed in the Sleep Mode: Maximum Cycling Protection Time (P2-07). If no cycling occurs within the
programmed time, the drive will reset the internal cycle register.
The Sleep Mode: Maximum Cycling Protection Time (P2-07) works in conjunction with the Sleep Mode: Cycling Protection (P2-06).
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P2-08 Over-Cycling Mode
If P2-08 = “0: Disabled,” the over-cycling mode is disabled.
If P2-08 = “1: Alarm,” then a “Pump Cycling” alarm will occur to indicate a pump over-cycle condition when the maximum number of
cycles has been reached as defined by the Sleep Mode: Cycling Protection (P2-06).
If P2-08 = “2: Pump Over Cycle Fault (POC),” then a “Pump Over Cycle (POC)” fault will occur to indicate a pump over-cycle fault
condition, when the maximum number of cycles has been reached, as defined by the Sleep Mode: Cycling Protection (P2-06).
If P2-08 = “3: Auto Compensation,” then the drive will automatically increase (compensate) the system setpoint by the value
programmed in the Setpoint Compensation (P2-09) parameter.
The compensation will increase each time the maximum number of cycles is reached as defined by the Sleep Mode: Cycling Protection
(P2-06) function. When the setpoint is increased (incremented), the internal over-cycle counter will be reset.
The original setpoint will be restored (decreased) in steps defined by Setpoint Compensation (P2-09) when the pump system has been
operating without cycling for the time programmed in the Maximum Cycle Protection Time (P2-07) parameter.
Over-cycle protection is only active during operation in the Auto Mode and in combination with no-flow sleep functions P2-05 and P2-
07.
Note: Maximum setpoint compensation can be programmed in Maximum Setpoint Compensation (P2-10).
Manually starting and stopping the drive will reset the internal over-cycle counter. Transitioning from Hand to Auto Mode will also reset
the internal over-cycle counter.
Setting Description
0 Disabled ( factory default)
1 Alarm
2 Pump Over Cycle Fault (POC)
3 Auto Compensation