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6
Table 6-4
Single-channel: Test pulses enabled
Error type
Error in the actuator
Despite being disabled, the
actuator does not switch to the safe
state (e.g., a contact will not open)
Actuator cannot be enabled
(e.g., interrupt)
Other errors
(depending on the actuator)
Error in the wiring
Interrupt
Cable interrupt between output and
actuator or between actuator and
ground
Cross circuit
Output to output
Short circuit
Output to ground
or
output to FE
6-6
Enable the test pulses to improve device diagnostics.
If the test pulses for the actuator are faulty, they can be disabled. In this case, test the
switching capability of the outputs at regular intervals.
Device diagnostics and behavior of the module in the event of an error
Detec-
Diag-
Loss of
tion
nostics
SF
No
None
Yes
No
None
No
No
None
No
Yes
All LEDs
Yes
OUT:
Red ON
Yes
Short
No
circuit or
overload,
OUTx
User manual IC220SDL953 - September 2011
Remark
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.
If necessary, use a two-channel actuator.
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.
Please take into consideration all possible errors that can occur
in the actuator.
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.
When the outputs are disabled, a cross circuit between the outputs
is only detected if the test pulses are enabled. If an error is detected,
the module disables all its outputs.
The error is detected in the ON state. The output is disabled (safe
state). The module cannot be switched on again with an edge from
"0" to "1" until the error has been removed and acknowledged.
WARNING: Unexpected machine startup
An operator acknowledgment leads to a positive
edge and can thus result in the outputs being re-
enabled.
GFK-2731
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