Siemens S7-300 Installation And Operating Manual page 175

Causes of the problem and corrective measures
The table below shows possible causes of the problem and appropriate corrective measures
for the individual diagnostic messages of SM 326, F-DO 10 x DC 24V/2A PP.
Table 8- 26
Diagnostic message Error detection Possible causes of the problem
Wire break
Short-circuit of
output to M, or
defective output
driver
Short circuit of
output to L+, or
defective output
driver
Module parameters
not assigned
Incorrect module
parameters
Internal supply
voltage of the
module failed
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
8.7 SM 326; F-DO 10 x DC 24V/2A PP (6ES7326-2BF10-0AB0)
Diagnostic messages and associated corrective measures for SM 326; F-
DO 10 x DC 24V/2A PP
Only if the
output = 1
or
during light
period test
Only if the
output = 1
or
during light
period test
For non-
redundant
operation
general
General
general
general
Wire break between the module
and actuator
Channel not connected (open)
Short-circuit to L+ at the output
Short-circuit between channels
which carry different signals
Output overload
Short-circuit to M at the output
Undervoltage at load voltage
supply
Defective output driver
Short-circuit to L+ at the output
Short-circuit between channels
which carry different signals
Defective output driver
No parameters transferred to
module
Faulty parameters transferred to
module
Internal fault at supply voltage 1L+
Digital modules
Corrective measures
Restore the cable
connection
Disable the "Group
Diagnostics" for the
channel in the
parameter settings.
Eliminate the short-
circuit
Eliminate the short-
circuit
Remove the overload
within 100 hours after
the fault has occurred.
Remove the short circuit
within 100 hours after
the fault has occurred.
Check the load voltage
supply
Replace the module
Remove the short circuit
within 100 hours after
the fault has occurred.
Module reset required
(cycle power supply
off/on)
Remove the short circuit
within 100 hours after
the fault has occurred.
Module reset required
(cycle power supply
off/on)
Replace the module
Assign new module
parameters
Assign new module
parameters
Replace the module
175