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Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
123
Chapter 9 Connected Components Workbench Software
GPIO
shows an overview of the layout of the General Purpose
Input Output (GPIO) window. The window has three significant areas:
1. Connection plug-in
2. Cascading plug-in
3. Message box — informs you whether the mandatory GPIO has been
specified
The configuration cannot be downloaded to the stick until the mandatory
GPIO is completed. When completed, the message box has a green
background.
Multiple scans
Defines whether the safety light curtain operates in a multiple scanning mode. When
enabled, multiple scan modes only turn OSSDs OFF if there are at least three consecutive
scans with an interruption. The normal mode of operation is the double-scan, which turns
OSSDs OFF if there is an interruption in at least two consecutive scans. This extra measure of
resiliency against spurious trips adds an additional 33% (approximately) to the response
time.
Short interruption
ignored
You can define a filter time to ignore short interruptions of the safety light curtain.
• Min: 0 ms
• Max: 174 ms
• Increment: 2 ms
OSSD threshold
time
You can define a filter time the OSSD outputs from changing too quickly. This function is
applicable when the OSSD outputs are connected to electromechanical devices like relays
and contactors, and the light curtain is set for automatic start.
If the safety light curtain is broken and cleared more than twice within the OFF time, the
OSSD outputs turn OFF during the ON time. The ON time must be equal to or greater than the
OFF time.
• Min: 30 ms
• Max: 5000 ms
• Default: ON 500 ms, OFF 250 ms
Laser switch off
time
If enabled, the laser turns off automatically after the selected time expires.
• Min: 0 s
• Max: 255 s
• Increment: 1 s
Configured
response time
The response time is automatically adjusted based on protective height, multiple scanning,
beam coding, and short interruption ignore functions.
Configured
resolution
The resolution is automatically adjusted when reduced resolution or floating blanking are
configured.
Table 58 - General Setting Descriptions
Setting
Description
ATTENTION:
If the response is set time longer than 90 ms,
it can allow a person to walk through the safety light
curtain undetected. Safety distance/physical barriers
must be adjusted accordingly.