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Operation Using
a Programmable Logic Controller (PLC)
Inactive Pump Flush and Prime Sequences
YES YES
YES
YESYES
NO NO
NONO
NO
Write Flush Sequence #
(1-5) to Output Register 01
Write
Flush Pump Command
(1,3,5,7) to Input Register 02
Write
Prime Pump Command
(2,4,6,8) to Input Register 02
Is requested pump
status* = Standby?
(Output Register* = ‘1’)
Pump is flushed using
assigned sequence number.
Pump Status = Flushing
(Output Register* = ‘3’)
Pump is primed using
assigned material.
Pump Status = Priming
(Output Register* = ‘4’)
Pump is either Off or Busy
(Output Register* = ‘0’ or ‘2’)
Busy refers to a pump that is
currently involved in a mixing
operation. No action taken.
NOTE: Be sure to read to
appropriate Output Register*
for the desired pump status:
Register 01 - Pump 1
Register 02 - Pump 2
Register 03 - Pump 3
Register 04 - Pump 4
Is requested pump
status* = Standby?
(Output Register* = ‘1’)
Is selected material valid
for requested pump?
Invalid request.
No action taken.
Write Prime Material #
(1-34) to Output Register 01
Is Flush complete? Is Prime complete?
Pump is returned to Standby.
Pump Status = Standby
(Output Register* = ‘1’)
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