Chapter 5 Troubleshooting; Troubleshooting Of Controller St4-C11 - Panasonic ST4 Series Instruction Manual

Chapter 5 Troubleshooting

<Reference>
● Check the wiring.
● Check the power supply voltage and the power supply capacity.

5-1 Troubleshooting of Controller ST4-C11

The number of blinks of the fault indicator (yellow) on ST4-C11 varies depend-
ing on the condition of error as shown in the table below.
Symptom
A l l i n d i c a t o r s a r e
OFF.
Emission halt input
indicator (orange)
lights up.
Interlock indicator
(yellow) lights up.
Fault indicator:
lights up
• Microcomputer error
Fault indicator:
blinks once
• Error between emit-
ter and receiver of
ST4-A□
64
Cause
Power is not being supplied.
Supply voltage is out of the
specified range.
The controller is in the emis-
sion halt condition.
R e s e t i n p u t
terminal is not
wired.
Reset con-
Relay is welded. Replace the relay.
dition is not
Relay response
cancelled.
time is slow.
Reset signal at
start-up is not
inputted. (manu-
ally)
Large noise
Internal error
The number of sensors is dif-
ferent between emitter and
receiver of ST4-A□.
Series connection condition
is out of the specified range.
The serial signal short-circuits
or comes down.
The ST4-A□ connected is in
error.
© Panasonic Industrial Devices SUNX Co., Ltd. 2016
Remedy
Check that the power supply capacity is
sufficient.
Connect the power supply correctly.
Set the supply voltage to 24V DC
Check that the emission halt input terminals
(between T1 and T2) short-circuit.
Wire the reset input terminals (manual
reset: between X1 and X2, or auto reset:
between X1 and X3) correctly.
To ensure the safety of system, use a NC
contact of forced-guided relay.
Replace the relay with proper response
time.
Use a momentary switch.
Replace the switch.
Check the noise condition around this de-
vice.
Replace the ST4-C11.
Set the same number of sensors on emitter
and receiver of ST4-A□.
Set the series connection condition within
the specified range.
For details, refer to "2-3-4 When Connect-
ing Multiple Units of Single-beam Sen-
sor ST4-A□."
Check that the cable of ST4-A□, ST4-CCJ□
(optional), or ST4-CCJ05-WY (optional) is
not disconnected or the connectors are not
loose.
Check the indicator of connected ST4-A□.
For details, refer to "5-3 Troubleshooting
of Single-beam Sensor ST4-A□."
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