Yaskawa iQpump Manual Supplement - Manual (Page 27)

9 Water Level/Suction Pressure Control in Memobus Multiplex
YASKAWA TM.iQp.10 iQpump Technical Manual Supplement 27
P9-50 = 3 (Network Only)
The drive will always use a valid network Water Level / Suction Pressure signal. If there are no available network signals,
the drive will act according to the setting of b5-12 with the following differences:
Setting b5-12 to 1: Instead of an alarm, Network P8-†† Lost message is displayed.
Setting b5-12 to 2: Instead of a fault, Network P8-†† Lost message is displayed. In this condition the iQpump
Controller no longer accepts iQpump Controller Network run commands and the stopping method is fixed to coast-to-
stop.
b5-12 PI Feedback Reference Missing Detection Selection
Any drive with b5-12 set to 0 (Disabled) and P9-50 ≠ 3 will effectively have no Terminal A1 signal loss detection and
will continuously send the Water Level/Suction Pressure to the iQpump Controller Network regardless of a faulty or an
invalid signal.
When b5-12 set to 2 (Fault) and P9-02 = 3, iQpump Controller will display a feedback loss alarm instead of a fault when
one of the following conditions active:
1. The iQpump Controller is in Hand Mode
2. There is no Lead iQpump Controller on the network
3. The iQpump Controller is not in Auto Mode
Minimum Water Level or Suction Pressure Detection Operation
In case of a minimum water level or suction pressure, the lead iQpump Controller will de-stage when one or more Lag
iQpump Controllers are present, otherwise the lead iQpump Controller will go to sleep.
Note: Setting parameter b5-12 to 0 will disable analog feedback detection and will prevent the iQpump Controller from switching to the
Network Water Level/Suction Pressure.
„ Related Parameters
b5-12 PI Feedback Reference Missing Detection Selection
Setting Description
0 Disabled
1 Alarm
2 Fault (factory default)
Setting Description
0 Disabled (factory default)
1 Alarm
2 Fault