SF4C Safety light curtain
6.1 Emitter-Related Problems
105
Error
Cause
Remedy
[Digital error indicator: ]
Interlock setting error
The voltage of the
interlock setting input
wire (pale purple) or
test input/reset input
wire (pink) is unstable.
Wire the interlock setting wire (pale purple) and test
input/reset input wire (pink) correctly. For details
"Wiring" on page 34.
[Digital error indicator: ]
Safety input crossover
short-circuit
The safety input 1 wire
(gray) or the safety
input 2 wire
(gray/black) is
connected to 0V/+V
Wire the safety input 1 wire (gray) or the safety input 2
wire (gray/black) correctly. Make sure there is no
damage at the safety contacting point.
[Digital error indicator: ]
Wiring error of the output
polarity setting wire (shield)
•
The output polarity
setting wire (shield)
comes down or
short-circuits with
other I/O wires.
•
The output polarity
setting wire (shield)
connection of the
emitter/receiver is
incorrect.
Wire the wire output polarity setting (shield) correctly.
(0V: PNP output, +V: NPN output)
[Digital error indicator: ]
Safety input error
The safety input 1
(gray) or safety input 2
(gray/black) is not
correctly wired.
Wire the safety input 1 (gray) and the safety input 2
(gray/black) correctly.
For details, "Wiring" on page 34 and "Safety Input
Function" on page 63 .
[Digital error indicator: ]
Supply voltage error
The specified voltage
is not supplied.
Check the wiring status, the supply voltage, and the
power supply capacity.
Muting lamp output is
short-circuited with +V
or 0V.
Muting lamp output is
short-circuited with
other I/O wires.
Excessive current
flows at the muting
lamp output.
Wire the muting lamp correctly, for details "Wiring" on
page 34.
The current value should be within the specified range
for muting lamp output.
The output polarity
setting wire (shield)
and the muting lamp
output (red) are not
correctly wired.
Wire the output polarity setting wire (shield) correctly.
(0V: PNP output, +V: NPN output)
Wire the muting lamp output wire (red) to +V.
For details "Wiring" on page 34
[Digital error indicator: ]
Muting lamp error
Output circuit error.
The output circuit is damaged. Replace this device.
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