Siemens S7-300 Installation And Operating Manual page 137

Diagnostic
message
Parameter
assignment error
(with specification
of a consecutive
number)
CRC signature error General
Timeout of safety
message frame
monitoring
Note
Note that an inductive load connected to the DO channels can induce voltages due to
interference of a strong, magnetic field. This situation can result in the error message short
circuit.
Remedy:
Create a spatial separation of the inductive loads and shield the magnetic field.
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
Error detection Possible causes of the
problem
General Error in dynamic parameter
reassignment
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.
General Assigned monitoring time
exceeded
Startup of the fail-safe signal
module
Digital modules
8.5 SM 326; DO 8 x DC 24V/2A PM
Corrective measures
Check the parameter
assignment in the user
program. Contact
SIMATIC Customer
Support if necessary
Eliminate the
interference
Check the monitoring
time parameters
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137