Feature Details - Low City Pressure Alarm - YASKAWA iQpump Manual Supplement

6

Feature Details - Low City Pressure Alarm

Overview
The alarm function is used for stopping the iQpump Controller or preventing the iQpump Controller from running based
on an external contact closure.
This function has been enhanced by parameter P4-27 which allows users to select the alarm message that will be
displayed when a Low City Pressure condition is detected.
Function Operation
P4-27 Low City Pressure Alarm Text
Selects the alarm message that will be displayed when a Low City Pressure condition is detected.
Setting
0 Low City Pressure (factory default)
1 Low Suction Pressure
2 Low Water in Tank
Alarm: Low Pressure/Low Water in Tank
Alarm Display
Shown when P4-27 = 1 and when the digital input has been active (closed for P4-21 = 0, or open for
Low Suction Pressure P4-21 = 1) for the time set in P4-22. The drive, if running, coasts-to-stop and does not run until the digital
input has been inactive for the time set in P4-22.
Shown when P4-27 = 2 and when the digital input has been active
Low Water In Tank (closed for P4-21 = 0, or open for P4-21 = 1) for the time set in P4-22. The drive, if running, coasts-to-stop
and does not run until the digital input has been inactive for the time set in P4-22.
Related Parameters
P4-21 Low City Pressure Input Select
Setting
0 Normally Open (closed for the "Low City Pressure" condition)
1 Normally Closed (open for the "Low City Pressure" condition) (factory default)
P4-22 Low City Pressure Input Delay Time
Range
Sets the amount of time a "Low City Pressure" condition must be present before
1 - 1000 sec the drives will stop. Also sets the amount of time that the pressure must be
adequate before the drive system will restart.
Multi-function Input Setting H1-
Setting
Indicates that sufficient/insufficient pressure is present on the inlet to the pump. This setting is used mainly
73 Low City Pressure
for pressure booster stations.
YASKAWA TM.iQp.10 iQpump Technical Manual Supplement
Description
: Low City Pressure
6 Feature Details - Low City Pressure Alarm
Description
Description
Description
Description
Default
10 sec
13