G3 Series EtherCAT
TM
Technical Manual
16-183
Subject to change without notice
www.asco.com/g3
Troubleshooting
Communication Node
Symptom Possible Cause Solution
The wrong valve solenoid coils
are being energized.
Z-Board
TM
type mismatch.
Single Z-Board
TM
present
where double Z-Board
TM
expected or vice versa.
Check that correct Z-Board
TM
types are
installed. Check that ribbon cable
(Output group No. 2) is connected to
appropriate valve station.
See page 15-169 for bit mapping rules
Valve outputs do not energize.
Output power not present or
connected improperly on
Auxiliary Power connector.
Check for 24VDC on the +24 VDC (Valves
and Outputs) pin of the MINI Auxiliary
Power connector of the Comm. module.
No Activity/Link LED No network connection
Verify the type of cable (straight-thru or
crossover) that is being used. Also, verify
the wiring of the cable.
I/O Modules
Symptom Possible Cause Solution
Outputs remain on when
communication is lost and/or
PLC is in “Program” mode.
Communication Fault
parameters in PLC
configuration set incorrectly
Review G3 Slave Node Configuration
Comm. Fault Parameter
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