Important information
WARNING
Ineffectiveness of the protective device
The function block does not perform a dual-channel evaluation or two-hand monitoring
of the inputs. The dangerous state may not be stopped or not be stopped in a timely
manner in the event of non-compliance.
b
Only connect safe signals that have undergone a preliminary evaluation to the
Operator 1 … Operator 3
inputs. This can be, for example, the
Enable
output of a
two-hand control function block.
Principle of operation
Table 97: Inputs
Input
Description
Operator 1
Operator 2
Data type: Boolean
Operator 3
(optional)
Release 1
Release 2
(optional)
Data type: Boolean
The function block uses the inputs to check whether specific prerequi‐
sites have been met (e.g., protective device closed, safety light curtain
active, etc.).
Cycle request
Data type: Boolean
A cycle request prevents one or more of the two-hand control devices
from remaining permanently actuated. For this purpose, the function
block requires a signal that, for example, generates a pulse during each
machine cycle.
Do not use this input for safety functions, but instead for, e.g. automa‐
tion control.
Table 98: Outputs
Output
Description
Enable
Data type: Boolean
The output switches to 1 if all of the following conditions are met:
•
The
Release 1
and
Release 2
inputs are and remain set to 1.
•
All connected
Operator 1 … Operator 3
inputs change from 0 to 1
(rising signal edge).
•
No rising or falling signal edge is detected at the
Cycle request
input
during or after the
Operator 1 … Operator 3
inputs change from 0 to 1.
The output switches to 0 if one or more of the following conditions are
met:
•
At least one connected
Release 1 … Release 2
input = 0.
•
At least one connected
Operator 1 … Operator 3
input = 0.
•
A rising or falling signal edge is detected at the
Cycle request
input.
During the first logic cycle, the
Enable
output = 0.
Table 99: Parameter
Parameter
Description
Condition for cycle
request
•
Rising edge
•
Falling Edge
Number of operators
•
2 operators
•
3 operators
7
CONFIGURATION
88
O P E R A T I N G I N S T R U C T I O N S | Flexi Compact
8024589/2020-11-10 | SICK
Subject to change without notice