Chapter 9
140
Logic programming – Function blocks
Always consider the total response time of the entire safety function!
The response time of the Fast shut off function block is not the same as the total
response time of the entire safety function. The total response time includes multiple
parameters outside of this function block. For a description of how to calculate the total
response time of the MELSEC-WS safety controller please see the Safety Controller
User’s Manual.
Parameters of the function block
Parameter Possible values
Number of inputs Fast shut off: 1 to 8
Fast shut off with bypass: 1 to 7
Select output for fast shut
off
All outputs of the safety I/O module whose inputs are connected
to the function block, if the output is not already used for Fast
shut off.
How to configure the Fast shut off function block:
The following example shows the function with three light curtains attached to a Fast
shut off function block.
To configure the Fast shut off function block perform the following steps:
Connect input elements to the function block. Double click the function block to
open the configuration dialog and click the I/O Settings tab.
ATTENTION
Table 42:
Parameters of the Fast shut
off function block
Figure 114:
Configuration example for
Fast shut off with three light
curtains
Figure 115:
I/O settings dialog for the
Fast shut off function block
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