Proton SL mini 1220, Инструкция по эксплуатации

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Proton Products SL mini and SLR mini Series Speed and Length Gauges Instruction Manual - issue 1s
Time
Object status LB1 LB1 SL / SLR status
T
0
Clear of LB1, LB2, SL / SLR Clear Clear No object
T
1
Leading edge interrupts LB1 Blocked Clear No object
T
2
Leading edge enters gauge
measurement spot Blocked Clear Object detected but speed
measurement not yet valid
T
3
- Blocked Clear Speed measurement valid (but not
displayed/output in “Length hold”
mode)
T
4
Leading edge interrupts LB2 Blocked Blocked Length measurement starts
T
5
Trailing edge clears LB1 Clear Blocked Length measurement ends
T
6
Trailing edge clears gauge
measurement spot Clear Blocked Speed measurement ends
T
7
Trailing edge clears LB2 Clear Clear No object
The distance between the gauge gauge and LB2 must be large enough to allow the gauge sufficient
time to generate valid speed measurements before the object reaches LB2 and triggers length
measurement. Distance “L” between LB1 and LBβ must also be less than the minimum object length.
I
MPLEMENTATION
Light barriers LB1 and LB2 can be connected to any 2 of the 3 logic inputs provided on the gauge.
The behaviour of the gauge can be configured to trigger length measurement only when
both LB1
and LB2 are blocked.
Both logic inputs should be configured to “Length hold” mode. An
active
logic input in “Length hold”
mode will cause the gauge to freeze length readings and force the displayed speed to zero (however,
internally the gauge will continue to accurately measure speed if an object is present). Hence each
logic input should be configured to be
active when its corresponding light barrier is clear .
A “Length offset” corresponding to the distance “L” between the two light barriers can also be
programmed in to gauge. The gauge will then automatically add this “Length offset” to i
ts length
measurement display and output.
The length measurement generated by the gauge will be ready to read by other production control
equipment when the output of LB1 transitions from blocked-to-
clear (the object’s trailing edge passes
through LB1). A momentary pulse may be sent to the third logic input on the gauge to reset the length
measurement once it has been read out by other production control equipment.
LB 1
LB 2
Gauge speed
measurement
Gauge length
length
measurement
H
L
H
L
Active
Inactive
Active
Inactive
T1 T2 T3 T4 T5 T6 T7 T0
Time
Measured length