Omron F3SG-PGA-A User Manual page 139

 Fixed blanking monitoring function
For safety reasons, the F3SG-SR transitions to LOCKOUT state* if part of a fixed blanking zone is
unblocked. (Factory default setting.)
In this case, power cycle or reset input enables the Fixed Blanking function again with the same setting
as previous one. Turn off the power and on again or turn on the reset input while all fixed blanking
zones are blocked.
When the F3SG-SR is set to Blanking Zone cancelled, the Fixed Blanking function is cancelled if part
of a fixed blanking zone is unblocked.
In this case, power cycle enables the Fixed Blanking function again with the same setting as previous
one.
Turn off the power and on again while all fixed blanking zones are blocked.
When quick blanking is set, if part of the zone set by the fixed blanking function is unblocked, the safety
outputs are turned OFF.
In this case, if interlock is released with all the fixed blanking zones blocked, the safety outputs are
turned ON.
When interlock is reset automatically, the safety outputs are turned ON at the same time as the
blanking zone is blocked. When interlock is reset manually, the safety outputs are turned ON by the
reset input after the blanking zone is blocked.
Setting to this monitoring function disabled disables the blanking monitoring.
* Allowable beams configured on both ends of fixed blanking zone are not monitored.
 Allowable beam
Allowable beam represents a beam out of the target of the Fixed Blanking Monitoring. This should be
configured for a fixed blanking beam that is irregularly blocked and unblocked due to oscillation of a
blocking object. An allowable beam can be assigned to the beams on both ends or one end of a fixed
blanking zone depending on the position of blocked beams and the number of beams in a zone to be
blocked by an object (or blocked zone).
When a fixed blanking zone is configured by the Teach-in with the Push Switch or the Muting Input A,
the allowable beams are configured automatically. Refer to the following descriptions for details.
For allowable beam setting with the SD Manager 3, refer to Chapter 4 Setting with SD Manager 3.
Refer to 4-3-4-1. Fixed Blanking for more information on changing functions by SD Manager 3.
See below for an example. (The example shows the case where the settings are made by the SD
Manager 3.)
In this case, 5th, 6th, and 10th beams are set as allowable beams. These beams is repeatedly blocked
and unblocked due to oscillation of a blocking object. But because these beams are not the target of
the monitoring, the F3SG-SR keeps the safety outputs in the ON state.
Upper
10th beam
6th beam
5th beam
Lower
Upper
Fixed blanking zone
Lower
System Operation and Functions
F3SG-SR/PG
E
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User's Manual