Run Up; Plc Inputs And Outputs - Graco InvisiPac HM25 Operation, Repair, And Parts

Troubleshooting

Run Up

Problem
Run up controller reads 0
psi
Run up controller produces
undesired results

PLC Inputs and Outputs

Problem
Input from PLC not read by pat-
tern controller
Output form pattern controller
not read by PLC
48
Cause
Integrated systems: InvisiPac systems
is INACTIVE
Stand-alone systems: PC system is
INACTIVE
No pressure to inlet of run up controller Ensure pressure is being supplied to the inlet
Improper user settings entered
Output pressure desired is greater
than inlet pressure
Cause
Improper input signal from PLC
Broken wire
Improper interface to PLC
Broken wire
Solution
Integrated systems: Turn system ON, run up
will be active once system is ACTIVE (pump
will turn on)
Stand-alone systems: Turn system ON, run up
controller will be active immediately
of run up controller (check for valves and
shut-offs upstream of controller)
Perform calibration routine found in Calibra-
tion - Run Up Control. See Calibration, page
40
Ensure enough pressure is being supplied to
the inlet of the run up controller (standard cali-
bration routine calls for 100 psi)
Solution
See PLC Inputs and Outputs Installation
(optional), page 19
Check wiring between pattern controller and
PLC
See PLC Inputs and Outputs Installation
(optional) for specifications and proper
installation
Check wiring between pattern controller and
PLC
334784G