10 Troubleshooting
C232-302-401/402/403/404-603 / C232/EN M/A23 10-1
10 Troubleshooting
This chapter describes problems that might be encountered, their causes, and possible
methods for eliminating them. It is intended as a general orientation only, and in cases
of doubt it is better to return the C232 to the manufacturer. Please follow the packaging
instructions in the section entitled ‘Unpacking and Packing’ in Chapter 5 when returning
equipment to the manufacturer.
Problem:
Lines of text are not displayed on the local control panel.
Check to see whether there is supply voltage at the device connection points.
Check to see whether the magnitude of the auxiliary voltage is correct. The C232
is protected against damage resulting from polarity reversal.
Before checking further, disconnect the C232 from the power supply.
!
The local control panel is connected to I/O module by a plug-in connecting cable. Make
sure the connector position is correct. Do not bend the connecting cable.
The C232 issues a ‘Warning’ signal on LED H3. (H3 is labeled ‘ALARM’,
it is coupled to the signal SFMON: Warning (LED).)
Identify the specific problem by reading out the monitoring signal memory (see the
section entitled ‘Monitoring Signal Memory Readout’ in Chapter 6). The table below
lists possible monitoring or warning indications (provided that a configuration setting
has been entered at SFMON: Fct. assign. warning), the faulty area, the
C232 response, and the mode of the output relay configured for 'Warning' and
'Blocked/faulty'.
SFMON: Warning (LED)
036 070
Warning configured for LED H3.
SFMON: Warning (relay)
036 100
Warning configured for an output relay.
Key
- : No reaction and/or no output relay triggered.
Yes: The corresponding output relay is triggered.
Updating: The output relay configured for 'Warning' starts only if the monitoring
signal is still present.
1)
: The 'Blocked/faulty' output relay only operates if the signal has been
configured at MAIN: Fct. assignm. fault.
2)
: The 'Warning' output relay only operates if the signal has been
configured at SFMON: Fct. assignm. warning.
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