Digital modules
8.7 SM 326; F-DO 10 x DC 24V/2A PP (6ES7326-2BF10-0AB0)
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
171
Parameters Range of values Type Effective
range
Diagnostics: Wire break Activated/deactivated Static Channel
Activated light test Activated/deactivated Static Channel
Max. time for light test (ms) 0.6 ms to 5 ms Static Channel
Max. read-back time for dark test
(ms)
0.6 ms to 400 ms Static Channel
Redundant switched
Activated
Static Channel
Always set the interconnected outputs in parallel instead of setting only one output. Process
signals of a redundant I/O system require four outputs with assigned redundancy.
8.7.6 Application 6: Safety mode SIL3/Cat.4/PLe with high availability (in S7 F/FH
Systems only)
Introduction
Below are the wiring scheme and the parameter assignment of SM 326; F-DO 10 x DC
24V/2A PP for
● Application 6: Safety mode SIL3/Cat.4/PLe with high availability
Diagnostic messages, possible causes of the problem and their corrective measures are
found in tables in the chapter "Diagnostic messages SM 326; F-DO 10 x DC 24V/2A PP
(Page 173)".
Note
In case of parameter setting with SIL3
The signal at the output has to change daily or even more frequently. If this is not the case
with the "0" signal, you will have to activate the light test that meets this condition.
WARNING
Note for "Keep last valid value" parameter setting:
If a module output is 0 due to a channel/module fault and the redundant module output is 1
due to a communication fault/interruption, the process value 1 will be created.
Also note the table "Reaction of the SM 326; F-DO x DC 24V/2A PP to CPU Stop" in the
chapter "Reactions to Faults in Safety Mode (Page 52)".
WARNING
Prevent short circuits to L+ at the SM 326; F-DO 10 x DC 24V/2A PP with protected routing
of the signal lines, because the actuator will remain activated otherwise.
In case of a short circuit to L+ it may happen in case of redundant wiring at the output with
configured redundancy operation that the associated output will not be switched off.
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