Process data status
bits
Value
Description
Status Qx
Short-circuit to Low
0
Output voltage level is Low instead of High when the output
is “On”. The safety output is “Off”, regardless of the logic
result.
1
Output is OK
Further topics
•
7.6.5
CPU marker
CPU marker
CPU markers are available in the logic editor as input elements and output elements.
After a delay of one logic cycle (i.e., the logic execution time), the input element of a
CPU marker always assumes the same value (1 or 0) as the associated output element.
They can be used to do the following, for example:
•
Create a reverse path.
•
Connect function blocks on different pages of the logic editor.
Complementary information
•
You can use the input elements of a CPU marker multiple times.
•
You can use the output element of a CPU marker only once.
7.6.6
Jump addresses
Jump addresses
Jump addresses are available as source and destination jump addresses in the logic
editor. The destination jump address assumes the same value (1 or 0) as the associ‐
ated source jump address without a delay. They can be used to do the following, for
example:
•
Create a reverse path.
•
Connect function blocks on different pages of the logic editor.
Complementary information
•
You can use up to 256 jump addresses.
•
A source jump address can have multiple target jump addresses.
7.6.7
Logic programming in the logic editor
7.6.7.1
Safety
•
Take into consideration that in the event of an error being detected, the associated
diagnostic elements are set to 0, however the input bits and output bits could
have invalid values. Evaluate the associated safe diagnostic elements (yellow), so
that the affected output signals can be switched off in the event of an error.
•
An error at an input can result in an unexpected rising or falling signal edge.
When edge detection is activated, this can lead to undesirable switching behavior.
Remember to allow for unexpected rising or falling signal edges when planning
your logic.
•
The function blocks are executed in a specific sequence during a logic cycle. You
can recognize the sequence of execution using the function block index that is
displayed at the top of each function block. If a function block uses the signal
of another function block with the same or a higher function block index, a so-
CONFIGURATION
7
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
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Subject to change without notice
