11
Fixed Blanking Section 5-1
5-1-1 Selecting Fixed Blanking with selector switches
To use Fixed Blanking, the operator enables the option using the selector
switches. A new Fixed Blanking pattern is recorded when the MS4800
receiver is in MACHINE STOP, the blanking function is active and the Program
function is activated. If the Fixed Blanking feature is disabled, the stored pro-
tected zone patterns are cleared.
1. The obstruction is placed
within the detection zone
and the receiver goes to
MACHINE STOP state.
An authorized user then
sets the selector switches
in the receiver endcap to
select Fixed Blanking En-
able. The MS4800 enters
a fault state and power is
cycled or the Start switch is activated to clear the fault. When the receiver
powers up it will be in Fixed Blanking mode with the red and amber LEDs
lit.
2. The authorized user then
enables the Program
switch by setting both
Fixed Blanking switches to
the off position and then
both to the on position.
When the first Fixed
Blanking switch is flipped,
the red LED begins flash-
ing at a rate of 3Hz. When
the final Fixed Blanking
switch is flipped, both the red and amber LEDs and the IBIs (Individual
Beam Indicators) of the blocked beams start flashing to indicate the Pro-
gram switch is enabled. The authorized user has 10 minutes to complete
the programming of a pattern.
3. To program a pattern, the
authorized user must flip
(off/on or on/off) the Pro-
gram switch once. Once
pattern is programmed the
yellow LED (INTERLOCK)
turns on. During 10
minute period, the user
may program as many
times as needed, allowing
for adjustment in the
placement of the obstruction.
IBIs of blocked
beams are On.
Amber LED turns on to indicate
in Fixed Blanking mode.
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321546
ON
ON
IBIs of blocked
beams flash.
Red and amber LEDs and IBIs
flash to indicate the
Program switch is active.
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321546
ON
ON
321 546
321546
ON
ON
off
off
on
on
SWA
SWB
IBIs of blocked
beams flash.
Yellow LED turns on to indicate
the pattern has been programmed
and the Start button is active.
321 546
321546
ON
ON
on
on
Flip
SWA
SWB
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