Siemens S7-300 - Page 134

Digital modules
8.5 SM 326; DO 8 x DC 24V/2A PM
Fail-safe signal modules
134 Installation and Operating Manual, 01/2010, A5E00085586-10
Possible diagnostic messages
The following table provides an overview of the diagnostic messages for SM 326; DO 8 x DC
24V/2A PM.
Diagnostic messages are assigned either to a channel or to the entire module.
Table 8- 17 Diagnostic messages of SM 326; DO 8 x DC 24V/2A PM
Diagnostic message Signaled in the
application
Effective
range of
diagnostics
Assignabl
e
Wire break
DOx_P short-circuit of the output to M, or
defective output driver
DOx_M short-circuit of output to M, or defective
output driver
DOx_P short circuit of output to L+, or defective
output driver
DOx_M short circuit of output to L+, or defective
output driver
1, 2
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
Internal error in read circuit/test circuit or
defective sensor supply
Processor failure
Parameter assignment error (with specification of
a consecutive number)
External load voltage missing
Short-circuit at the load voltage
Defective output driver
Overtemperature at output driver
Load voltage not connected
Defective load voltage or load voltage not
connected
1, 2
Module
CRC signature error
Timeout of safety message frame monitoring
1, 2 Module
No