Digital modules
8.4 SM 326; DI 8 x NAMUR
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
123
Diagnostic message
Possible causes of the problem
Corrective measures
Internal supply voltage of
the module failed
Internal fault at the L+ supply voltage Replace the module
Overload due to diagnostics request
(SFCs)
Reduce the number of
diagnostics requests
Electromagnetic interference has
exceeded limits
Eliminate the interference
Time monitoring activated
(watchdog)
Defective module
Replace the module
Electromagnetic interference has
exceeded limits
Eliminate the interference and
cycle the power supply OFF/ON
EPROM error
RAM error
Defective module
Replace the module
Internal error in read
circuit/test circuit or
defective sensor supply
Defective module
Replace the module
Electromagnetic interference has
exceeded limits
Eliminate the interference
Defective module
Replace the module
Processor failure
Switching rate exceeded
Reduce switching rate
Parameter assignment
error (with specification of
a consecutive number)
Error in dynamic parameter
reassignment
Check the parameter
assignment in the user program
Contact SIMATIC Customer
Support if necessary
CRC signature error
CRC signature error during
communication between the CPU
and the module has occurred, for
example, due to electromagnetic
interference in excess, faults during
sign-of-life monitoring error or
standard program accesses F-SM.
Eliminate the interference
Assigned monitoring time exceeded Check the monitoring time
parameters
Timeout of safety message
frame monitoring
Startup of the fail-safe signal module —
Message frame error
Sign-of-life and/or CRC signature
entered in the data message frame
Check the sign-of-life and CRC
signature entries in the data
message frame for "0" value
Содержание Simatic S7-300
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Страница 344: ...Glossary Fail safe signal modules 344 Installation and Operating Manual 01 2010 A5E00085586 10 ...
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