User's Manual

Doc.: HD0389-00-Manuale_TL_GWCxxxx_r.0.1_EN.doc-00 17/04/2011 Page 41 of 49
4.4. Toubleshooting
Troubleshooting
table
Simptoms Consequent action
No effects are observed on the
controller system.
Please check power supply wiring, fuse
integrity and, if previous checks are ok, verify
that power supply voltage is within allowed
range and tolerances.
User program does not run
Please check wirings and power supplies.
Please check software manual.
No data exchange on
communication lines
Please check wirings and power supplies.
Please check software manual.
Digital outputs do not work
Please check digital outputs wirings and power
supplies.
Please check software manual.
Data on digital inputs is not read
properly
Please check digital input wirings, in particular
the Vss signal cable.
Please check software manual
Please use provided protection state diagram and troubleshooting table to
locate the problem and solve it. If correct device operations are not
restored, please contact TECNOLOGIX service department.
If not sure about GWC device operations, prior to replace it please check
that installation and provided power supply are those needed for device
correct operations.
Attempts to solve a problem by simply replacing the supposed faulty unit
are not a good practice in troubleshooting.
When normal operation conditions have been restored, please start up
the system (GWC device and controlled system) in order to avoid
dangerous situations.
If it is not possible to solve the problem, please phone TECNOLOGIX for
technical support or send an e-mail message including following
information:
• GWC device version (GWCnnnn) and serial number, as printed
on the label placed on the metal box;
• A full description of the problem, including working conditions
in which the problem arose;
• Any information about GWC device setup, i.e. I/O connections,
communication interfaces used and related network topology, if
any, etc.)
• Nominal and measured power supply voltage and its
characteristics (i.e. ripple);
• Any information about additional devices connected to GWC
(data exchanged, connection diagram, etc.)
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