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Error Diagnostics
5.3
Other Causes of Malfunction
Hardware components or improper installation can also cause malfunctions. Table 5-10 summa-
rizes such malfunctions.
Fault/Error
All inputs are zero.
All outputs are not set.
One input is zero. One output is not set.
The green LEDs on the power supply module
do not light up.
Sporadic malfunctions occur.
The PLC will not go into the "RUN" mode.
Note
If the PLC still does not operate properly after you have taken the appropriate action
recommended in Table 5-10, try to determine the faulty component by replacement.
5.4
System Parameters
Use the "SYSPAR" programmer function to read the system parameters (e.g. software release) out
of the CPU.
5-16
Table 5-10. Other Causes of Malfunction
Check the module and the load voltage.
Check the module and replace it if necessary.
Check the memory submodule. Check to see
if the controller has been set up according to
EMC guidelines.
Perform an Overall Reset.
S5-115U Manual
Action
EWA 4NEB 811 6130-02b
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