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OMRON Scientific Technologies Inc.
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© OMRON STI 0613 PN99804-0060 Rev. B
Table 4-3 System Response to Floating Blanking
Table 4-4 Floating Blanking Effects on Resolution
4 . 3 F
I X E D
B
L AN KI NG
W IT H
F
L OA T IN G
B
L A NK IN G
Warning!
Use of Fixed Blanking, and Floating Blanking will make the MS4800 system less
sensitive to objects in the detection zone. Improper use of these features can result in severe
injury to personnel. Fixed Blanking may require a hard barrier guard. Fixed Blanking and
Floating Blanking may require an increase in the safety distance. Read the following section
carefully.
When both Fixed Blanking and Floating Blanking are selected, the floating channels are allowed to
occur anywhere within the detection zone except the area selected by Fixed Blanking.
4.3.1
T
HE
E
FFECT
OF
F
IXED
OR
M
ONITORED
B
LANKING
OR
F
L OATING
B
LANKING
ON
M
INIMUM
O
BJECT
R
ESOLUTION
When Fixed Blanking and/or Floating Blanking are active, the safe mounting distance is affected.
Fixed and Floating Blanking desensitize the light curtain and increase the size of the minimum
detectable object. The increase is equal to the beam spacing distance for each beam that is disabled.
• A MiniSafe MS4800-20 system with one beam disabled has a minimum object resolution of:
20 mm + 10 mm = 30 mm (1.18 inches).
• A MiniSafe MS4800-20 system with two beams disabled has a minimum object resolution of:
Floating
Blankin
g
Inactive
1
Channe
l
Floating
Blankin
g Active
1
Channe
l
Floating
Blankin
g Active
1
Channe
l
Floating
Blankin
g Active
1
Channe
l
Floating
Blankin
g Active
2
Channe
l
Floating
Blankin
g Active
2
Channe
l
Floating
Blankin
g Active
2
Channe
l
Floating
Blankin
g Active
2
Channe
l
Floating
Blankin
g Active
2
Channe
l
Floating
Blankin
g Active
2
Channe
l
Floating
Blankin
g Active
2
Channe
l
Floatin
g
Blankin
g
Active
Channel
1
Channel
2
Channel
3
Channel
4
Channel
5
System
Respons
e
1
Exception
MACHINE
STOP
0
Exception
s
Machine
Run
1
Exception
Machine
Run
2
Exception
s
MACHINE
STOP
2
Exception
s
MACHINE
STOP
0
Exception
s
Machine
Run
1
Exception
Machine
Run
2
Exception
s
Machine
Run
2
Exception
s
Machine
Run
3
Exception
s
MACHINE
STOP
3
Exception
s
MACHINE
STOP
3
Exceptio
ns
MACHINE
STOP
Floating Blanking Effects on Minimum Object Resolution
Standard Minimum Objection
Resolution (No Floating
Blanking)
Minimum Object Resolution with
1 Beam Floating
Minimum Object Resolution
with 2 Beam Floating
14mm
24mm
34mm
20mm
30mm
40mm
30mm
50mm
70mm
40mm
70mm
100mm
▲
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