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Parameter
Description
Overflow behaviour
This parameter controls the behavior of the function block when the
internal counter has reached the maximum value and then another
counting pulse occurs at the
Up
input.
•
No overflow function
All other rising signal edges at the
Up
input are ignored.
•
No overflow function
°
The
Overflow
output is 1 for the duration of a logic cycle.
°
The value of the internal counter is set to 0.
Underflow behaviour
This parameter controls the behavior of the function block when the
internal counter has reached the value 0 and then another counting
pulse occurs at the
Down
input.
•
Underflow function
All other rising signal edges at the
Down
input are ignored.
•
No underflow function
°
The
Underflow
output is 1 for the duration of a logic cycle.
°
The value of the internal counter is set to the
Maximum value
parameter.
Maximum value
1 … 65,535
The value must be greater than or equal to Reload value.
Reload value
0 … 65,535
The value must be less than or equal to the
Maximum value
parameter.
7.6.2.4
Function blocks for input evaluation
7.6.2.4.1
Two hand control (2 inputs) V1
Overview
This function block provides the logic for monitoring the inputs of a two-hand control
device. The category 1 (Type IIIA) or category 4 (Type IIIC) according to EN 574 depends
on the wiring and parameterization.
Principle of operation
Table 72: Inputs
Input
Description
1A (NO)
1B (NC)
Data type: Boolean
Table 73: Outputs
Output
Description
Enable
Data type: Boolean
•
0 = not enabled
•
1 = enabled
The
Enable
output is set to 1 if the following conditions are met:
°
Both inputs are inactive at the same time for at least the dura‐
tion of the logic execution time
°
Both inputs are then active
Synchronization status Data type: Boolean
•
0 = Error
Synchronization time exceeded.
•
1 = No error or unknown
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
73
Subject to change without notice