Digital modules
8.4 SM 326; DI 8 x NAMUR
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
121
8.4.8
Diagnostic Messages for SM 326; DI 8 x NAMUR
Possible diagnostic messages
The following table provides an overview of the diagnostic messages for SM 326;
DI 8 x NAMUR.
Diagnostic messages are assigned either to a channel or to the entire module. Some
diagnostic messages occur only in certain applications.
Table 8- 14 Diagnostic messages of SM 326; DI 8 x NAMUR
Diagnostic message
Signaled in the
application
Effective
range of
diagnostics
Assignable
Wire break or internal fault at the sensor supply
Short-circuit between sensor signal and supply
lines
yes
Internal error in read circuit/test circuit or
defective sensor supply
1, 2, 3, 4, 5, 6
channel
No
Discrepancy error
(1oo2 evaluation)
5, 6
channel
Yes
No external auxiliary voltage
Module parameters not assigned
Incorrect module parameters
Communication error
Internal supply voltage of the module failed
Time monitoring activated (watchdog)
EPROM error
RAM error
Processor failure
Parameter assignment error (with specification of
a consecutive number)
1, 2, 3, 4, 5, 6
Module
CRC signature error
Timeout of safety message frame monitoring
3, 4, 5, 6
Module
Message frame error
1, 2
Module
No
