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The function block makes it possible to acknowledge a manual safety stop and subse‐
quently restart the application.
Important information
WARNING
Undesired reset following short-circuit to High
The dangerous state may not be stopped or not be stopped in a timely manner in the
event of non-compliance.
b
Make sure the signal line is laid with protection (to prevent a cross-circuit with
other signal lines).
b
No short-circuit detection, i.e., no referencing to test outputs.
Principle of operation
Table 93: Inputs
Input
Description
Reset
Data type: Boolean
For connecting a reset command switch.
A valid reset sequence comprises the signal sequence 0–1–0.
Pulse duration: 100 ms … 30 s, at least 2 × logic execution time
Release
Data type: Boolean
See
Enable
output.
Table 94: Outputs
Output
Description
Enable
Data type: Boolean
Resets the safety device.
•
When the
Release
input = 1 and the function block detects a valid
reset pulse on the
Reset
input, the
Enable
output switches to 1.
•
The
Release
output remains = 1 as long as the
Enable
input = 1.
Reset required
Data type: Boolean
The output pulsates at 1 Hz to indicate that the function block is
expecting a valid reset pulse at the
Reset
input so that the
Enable
output
can switch to 1.
When the
Release
input = 1 and the function block detects a rising
signal edge at the
Reset
input, the
Ready for reset
output switches perma‐
nently to 1.
You can use this output to control an indicator lamp.
Ready for reset
Data type: Boolean
The output switches to 1 when a valid pulse at the
Reset
input leads to
activation of the
Enable
output.
CONFIGURATION
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8024589/2020-11-10 | SICK
O P E R A T I N G I N S T R U C T I O N S | Flexi Compact
85
Subject to change without notice