Operational; P-Mod Modbus Communications - Pentair Goyen Precision P1 Installation And Operating Instructions Manual

Operational

SYMPTOM
P2 does not go into cleaning mode on
startup. Display shows: 'Precoating'.
Valves do not pulse.
P2 does not go into cleaning mode on
startup. Display shows: 'Stopped (dP)'. Valves
do not fire.
P2 does not go into cleaning mode on
startup. Display shows: 'Stopped (FAN)'.
Valves do not pulse.
Valves on multiple expansion boards
are firing simultaneously. The outputs
correspond to each other.
Expansion cards are not pulsing sequentially
(Pattern cleaning mode is off).
P-MOD.Modbus.Communications
SYMPTOM
System is not recognised on the DCS or
plant SCADA system. P-Mod is recognised
by Precision on startup.
INSTALLATION AND OPERATING INSTRUCTIONS PRECISION
CAUSE
P2 is waiting for differential pressure to rise
above the factory preset Precoating value
(1.5 kPa, 6" WG) or the user set value.
P2 is waiting for differential pressure to
rise above the factory preset Remote Stop
trigger value (0.5 kPa or 2" WG) to commence
operation.
Fan contacts are closed on the baseboard.
Two or more expansion cards are set with the
same address.
Expansion card addresses have not been
assigned in sequential order.
CAUSE
Modbus communications is turned OFF in the
menu. Diagnostics on startup will indicate
Network is OFF.
Network address of controller is incompatible
with address assigned at DCS level.
FILTER CLEANING SYSTEM CONTROLS
®
RESOLUTION
Enter the menu and set Precoating to off, or
wait for differential pressure to rise.
Enter the menu and set remote stop dP to
the preferred value or to 'Hardwired', or wait
for the dP to rise.
Check wiring to fan contacts; if the fan or
another circuit breaker is not connected
to the Precision, the fan contact terminals
should be open.
If the fan is connected to the baseboard,
check that the contacts at the fan are
normally open type, and check the wiring.
Check each output is assigned a unique
address.
Re-assign expansion card addresses in
numerical order.
RESOLUTION
Enter the menu, and at the network menu
item ensure the network is given an address,
rather than set to off.
Check address setting on the Precision
matches the DCS.
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