Rockwell Automation MSR42 Curtains Configuration and Diagnostic Software Tool User Manual - Manual (Page 52)

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Light Curtain Multi-Function Control Module User Manual
Original instructions
Figure 70: Wiring diagram for “two sensor T-type w/enable signal” muting
5.7. Blanking
Generally, “Blanking” is understood to mean ignoring the interruption of specific beams within a light curtain. Certain applications cannot be
protected in any other way. If, for example normal operation of a machine requires that material be permanently fed into the dangerous part of a
machine, then a portion of the protective field will always be interrupted, but the machine should nevertheless continue to operate. The protection with
Blanking must come from a detailed risk analysis. Those responsible must ensure that in spite of Blanking, the safety of the machine operator is
adequately accounted for. When necessary, additional protective measures must be taken to adequately shield the dangerous area. All Blanking modes
create “holes” in the protective field. These “holes” must be considered separately in the risk analysis.
With the MSR42 Configuration and Diagnostic Software Tool, the three most important Blanking modes can be configured for the GuardShield
Micro 400 safety light curtain.
Table 5: Blanking modes (*= tolerance is reduced to +/- 0 beams when one beam is “teach-in” or configured)
It is possible to define different blanking regions with different blanking modes within one light curtain (5.7.4).
The following general rules must be understood:
• Different Blanking regions may not overlap.
• Regions without a Blanking mode, also with standard safety, will automatically be configured.
• Each configured region must be confirmed with the "Quick check" button, before the configuration of the next region can take place.
• The calculation of a new response time and a new resolution occurs after the "Quick check" confirmation.
• The maximum object size without detection is also calculated after the "Quick check" confirmation.
• After a successful configuration, the Blanking function will only be active when a Blanking lamp is attached. The Blanking lamp must be
mounted near the protective field, clearly visible to the operator
• A configured Blanking function is visible on the MSR42 controller through the LED “Lamp”
• After a successful teach-in, the Blanking function will only be active when a Blanking lamp is attached.
Mode Monitoring Beam tolerance Explanation
Teach In Blanking With +0 /-1 beam (*)
One object, constant number of beams, at one
defined location
Fixed Blanking With +0 /-1 beam (*)
One object, constant number of beams, at one
defined location
Floating Blanking
With +0 /-1 beam (*)
One object, constant number of beams, anywhere
within the defined blanking region.
Without +0 /-max. beams (*)
One object, up to the maximum number of beams,
anywhere within the defined blanking region.