Configuring Sm 1226 F-Dq 2 X Relay Dq And Channel Parameters; Sm 1226 F-Dq 2 X Relay Channel Parameters; Sm 1226 F-Dq 2 X Relay Dq Parameters - Siemens SIMATIC S7 Functional Safety Manual

Fail-Safe signal module (SM) I/O configuration

5.5 Configuring SM 1226 F-DQ 2 x Relay DQ and channel parameters

5.5 Configuring SM 1226 F-DQ 2 x Relay DQ and channel parameters
Table 5- 6

SM 1226 F-DQ 2 x Relay DQ parameters

DQ parameters
Relay continuous on time
limit
Table 5- 7

SM 1226 F-DQ 2 x Relay channel parameters

Channel parameters
Activated
Channel failure
acknowledge
114
Description
Maximum number of days that the relay can
remain continuously on before automatic pas-
sivation.
Whenever the relay cycles from the de-
energized to energized state, the number-of-
days calculation begins again.
Note: The 30-day default is the maximum test
frequency for SIL 3/Category 4 applications.
You can extend the test frequency for SIL
2/Category 3 applications for this product to as
much as 366 days.
Description
Select the check box to activate the channel.
Deselect the check box and the unused
channel is deactivated.
If you deactivate a channel, you also deacti-
vate its diagnostic function.
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.
Default Options
30 1 to 366 days
Default Options
Check box se- Check box:
lected
Selected
•
Deselected
•
Manual Not configurable
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA