Important information
WARNING
Ine
ffectiveness 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
T
able 97: Inputs
Input Description
Operator 1
Oper
ator 2
Data type: Boolean
Operator 3
(opt
ional)
Release 1
R
elease 2
(optional)
Data type: Boolean
T
he 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 c
ycle 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
r
equest
•
Risin
g edge
•
Falling Edge
Number of operators
•
2 oper
ators
•
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