Fail-Safe signal module (SM) I/O configuration
5.3 Configuring SM 1226 F-DI 16 x 24 VDC DI and channel parameters
S7-1200 Functional Safety Manual
108 Manual, 02/2015, A5E03470344-AA
Table 5- 3 SM 1226 F-DI 16 x 24 VDC channel parameters
Activated Select the check box to activate the channel.
You must activate both required channels
before selecting 1oo2.
If channels are paired, you must change to
1oo1 and change individually.
Deselect the check box and the unused chan-
nel is deactivated.
If you deactivate a channel, you also deacti-
vate its diagnostic function.
Check box selected Check box:
• Selected
• Deselected
Input filters Digital inputs are filtered to remove contact
bounce and short duration noise. This parame-
ter assigns the duration of the filter time.
6.4 ms
• 0.8 ms
• 1.6 ms
• 3.2 ms
• 6.4 ms
• 12.8 ms
Channel failure
acknowledge
Controls whether the channel is automatically
reintegrated after a fault clears, or requires an
acknowledgement (manual) in the user pro-
gram. Refer to "Reactions to faults" (Page 115)
for the reintegration procedure.
Manual
• Automatic
• Manual
Sensor supply Assign whether 24 V power is supplied to sen-
sors from a sensor supply output of the module
(internal) or from an external power supply
(external).
Short-circuit tests are not performed for any
channel where external power is selected.
External
• Internal
• External
Sensor evaluation Assigns whether channel x input operates
individually or is paired with channel x+8 input.
One sensor is connected to
the module on a single channel.
Two input channels are occu-
pied by either:
• Two 1-channel sensors
• One 2-channel equivalent sensor
• One 2-channel non-equivalent sensor
If 1oo2 is selected, you must assign the digital
input connection type and discrepancy proper-
1oo1 evaluation
• 1oo1 evaluation
• 1oo2 evaluation
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