6
Device diagnostics and behavior of the module in the event of an error
Typical parameterization
According to the "Value range of switch-off delay for stop category 1" and "Switch-off delay
for stop category 1" parameters, in this example, the switch-off delay is 30 x 1 s = 30 s.
Table 6-5
Single-channel: No alarm input assigned
Error type
Detection Diagnostics Loss of
SF
Remark
Error in the actuator
Despite being disabled, the
actuator does not switch to the safe
state (e.g., a contact will not open)
No
None
Yes
Detect errors using external monitoring. Please take into
consideration all the possible errors for the actuator used.
Test the shutdown capability of the actuator at regular
intervals.
Actuator cannot be enabled
(e.g., interrupt)
No
None
No
Detect errors using external monitoring. Please take into
consideration all the possible errors for the actuator used.
Ensure that this error does not result in delayed system
startup.
Other errors
(depending on the actuator)
Please take into consideration all possible errors that can
occur in the actuator.
Error in the wiring
Interrupt
Cable interrupt between output and
actuator or between actuator and
ground
No
None
No
Detect errors using external monitoring. Please take into
consideration all the possible errors for the actuator used.
Ensure that this error does not result in delayed system
startup.
Cross circuit
Output to output
No
None
Yes
The error leads to the loss of the safety function. Prevent this
error.
Short circuit
Output to 24 V
No
None
Yes
The error leads to the loss of the safety function.
Output to ground
No
None
No
Protect the output against damage using a preconnected fuse.
Table 6-6
Single-channel: No alarm input assigned; typical parameterization
Parameterization
Parameterized as
Remark
Assignment
Used
Output
Single-channel
IN1
Do not evaluate
IN2
Do not evaluate
Switch-off delay for stop category 1
30
Application-specific
Switch-off delay for stop category 1
Enabled
Or disabled
Value range of switch-off delay for stop category 1
Value in s
Application-specific
Enable (VersaSafe only)
Enabled
Or disabled
6-8
User manual IC220SDL840 -
May 2018
GFK-2734