YASKAWA TM.iQp.07 iQpump Controller Programming Manual 151
Figure 1.110
Figure 114. Not Maintaining Setpoint (NMS) Fault
Table 55 Messages <0034>
◆ P1-12 Not Maintaining Setpoint Time <0034>
Setting Range: 0 ~ 3600 s
Factory Default: 60 s
The iQpump drive can be configured to display a Not Maintaining Setpoint (P1-12) fault when the difference between the setpoint and
the feedback levels are exceeded for the time programmed in the Not Maintaining Setpoint (P1-12). The drive will coast to a stop after the
level has been exceeded for the specified time programmed in P1-12.
This function is only active during operation in the Auto Mode.
The Not Maintaining Setpoint Time (P1-12) is also used for the Prime Loss Level (P1-14) function. Refer to Prime Loss Level (P1-14)
for more details.
The Not Maintaining Setpoint Time (P1-12) works in conjunction with Maximum Setpoint Difference (P1-11) and Prime Loss Level (P1-
14).
Note: The time value programmed into P1-12 is shared by Maximum Setpoint Difference (P1-11) and Prime Loss Level
(P1-14) functions. However, independent times are maintained. If one function time; such as P1-11, has elapsed, the
other functions time (P1-14) is still maintained until this time has elapsed.
Not Maintaining Setpoint: The “Not Maintaining Setpoint” detection is now the only thing that parameter P1-12 controls. Also, the
“Not Maintaining Setpoint” timer is held reset during the pre-charge function to prevent erroneous operation.
• P1-12 is only effective for the “Setpoint Not Met” fault.
• “Setpoint Not Met” is disabled during pre-charge.
Table 56 Parameters
Message Display Description Cause Countermeasures
Net Pump Err Chk
Faulted Pump
Drive has been stopped because
another drive in the network has
a system fault (LOP, NMS,
HFB / HW, LFB / LW, LOWFL,
HIFLO, or ACCUM) or has the
Low City Pressure alarm.
Another drive in the network has a system fault (LOP,
NMS, HFB / HW, LFB / LW, LOWFL, HIFLO, or
ACCUM).
Check the drive that has the actual system fault and
either let the System Fault Retry function clear the
fault, or manually reset the faulted drive.
Another drive in the network has a Low City Pressure
alarm.
Check the drive that has the Low City Pressure alarm
and either reset the Low City Pressure digital input
(H1-0x = 73) or resolve the pressure situation.
Parameter
No.
Addr.
Hex
Parameter Name
Digital Operator Display
Description Range Default
Menu
Location
P1-12 107
Not Maintaining Setpoint Time
Not Maint SP Tm
Delay time before a Not Maintaining Setpoint fault occurs. Pump
protection criteria specified in P1-11 must be met for the drive to
fault. On fault the drive will coast to a stop.
Setting P1-12 = 0 disables the Not Maintaining Setpoint fault
0 ~ 3600 s 60 s Programming
TIME
Not Maintaining
Setpoint (NMS) Fault
Not Maintaining
Setpoint Time P1-12
P1-11
P1-11
SETPOINT
PRESSURE
FEEDBACK
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