Operation Using a Programmable Logic Controller (PLC)
Alarm
Alarm
Alarm Clearing
Clearing
Clearing Sequence
Sequence
Sequence
NO
Clear Active Alarm
Write ‘1’ to Input Re gis te r 08
NOTE: Some alarms put the
system in Standby , more serious
alarms shut the pumps down. If
an alarm condition is active the
System Mode will either be
Pump Off or Standby: Alarm .
(Output Register 00 = ‘1’ or ‘20’)
No action taken.
Clear active alarm.
Clear most recent active
alarm.
Remaining alarm(s) still
active.
Is there an active
alarm?
Is there more than 1
active alarm?
YES
YES
NO
NOTE: If more than 1 active
alarm exists a repeated write
of ‘1’ to Input Register 08 is
required for each.
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