Digital Modules
3-91
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Behavior and Diagnostics of the SM 322; DO 8 x 120/230 VAC/2 A ISOL
Table 3-23 gives an overview of the diagnostic messages of the
SM 322; DO 8 x 120/230 VAC/2 A ISOL.
Table 3-23 Diagnostic Messages of the SM 322; DO 8 x 120/230 VAC/2 A ISOL
Diagnostics Message
LED Scope of the diagnostics Parameters can be
assigned
Time-out SF Module No
EPROM error SF Module No
RAM error SF Module No
Error causes and remedies
Table 3-24 shows the diagnostic messages and error causes as well as the
remedies of the SM 322; DO 8 x 120/230 VAC/2 A ISOL.
Table 3-24 Diagnostic messages of the SM 322; DO 8 x 120/230 VAC/2 A ISOL,
error causes and remedies
Diagnostics
message
Error detection Possible error cause Remedy
Time-out Always Transient high
electromagnetic
interference
Remove interference and turn
the CPU power supply off and
on
Module defective Replace module
EPROM error Always Transient high
electromagnetic
interference
Remove interference and turn
the CPU power supply off and
on
Module defective Replace module
RAM error Always Transient high
electromagnetic
interference
Remove interference and turn
the CPU power supply off and
on
Module defective Replace module
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