Safety Light Curtain
Safety Light Curtain
Safety Light Curtain
Safety Light Curtain
F
F
F
F
F
F
F
F
3333
3333
S
S
S
S
S
S
S
S
N
N
N
N
N
N
N
N
ssss
ssss
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eeee
rrrr
rrrr
iiii
iiii
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No. ST2-015031A -14-
1.5.5. Light diagnosis mode
When unstable light reception state or unstable interruption state lasts for three seconds or
longer, the auxiliary output goes to the ON-state. Monitoring the output by a PLC or the like
makes it possible to detect the deterioration of optical performance caused by dirtiness on the
lens surface, misalignment between the emitter and receiver, deterioration of an LED, and so
on.
The “unstable state” means that the received light is in the range from OFF-threshold – 20 %
to ON-thr 20%.
Timing chart of the Light diagnosis mode
Power supply
State
OSSD outputs
Auxiliary outputs
t
OFF
: ON
Æ
OFF response time of OSSD outputs
1.5.6. Specified-beam mode
When any of specified beams is interrupted, the auxiliary output goes to the ON-state.
Response time OFF
Æ
ON : (ON
Æ
OFF response time of OSSD outputs) x 2
ON
Æ
OFF : (ON
Æ
OFF response time of OSSD outputs) x 2
Specified-beam mode
Power supply
State of specified beams
Auxiliary output
t
OFF
: ON
Æ
OFF response time of OSSD outputs
ON
About 3 sec.
Stable Light
Unstable Light
Unstable Dark
Stable Dark
t
OFF
x 2 or less
All ;Light
At least one beam; Dark
All; Light
t
OFF
x 2 or less
t
OFF
x 2 or less
ON
ON
ON
ON
