23
Appendix A
Troubleshooting
Should you encounter any errors during operation of the Temperature Sensor Unit, refer to the following table
for corrective measures.
Error LED indicator Input flag word n+5 IR Possible cause Remedy
RUN BROKEN 05 01 to 04 00 Words
WIRE Memory
error
Discon-
nection
detected
Setting
error
n+1
through
n+4
Outside
range
Lit Blinking OFF OFF OFF FFFF Input exceeds
tolerance of ±10%
for the temperature
specification range.
Confirm that the
temperatures to be
measured are within
the specified range.
Discon-
nection
Lit Lit OFF ON OFF E039 Disconnection
detected in input.
(See note 1.)
Check both the
sensing element
and the wiring.
Temper-
ature
specifi-
cation
setting
error
Unlit Unlit OFF OFF ON --- Error detected in
setting of
temperature
specification.
Recheck the K
(CA)/J (IC) selection
(pin 4) on the back
panel of the Unit,
the specified area
(word n bits 08
through 13) for the
temperature
specification codes,
and the setting
program.
Memory
error
Unlit Unlit ON OFF OFF E003
E004
E005
Internal memory
(storing modified
data) of Unit
defective.
Disturbance from
noise or irregularity
in hardware are
possible causes. If
alarm flag does not
light after removing
CPU
error
Unlit Unlit --- --- --- --- Error detected in
the watchdog timer
of the Temperature
Sensor. The PC
registers a Special
I/O Unit error.
disturbance and/or
turning power ON
and OFF
repeatedly, call
sales agent.
Replacement may
be necessary. (See
note 2.)
Note 1. A broken wire is detected if the positive or negative wires of the thermo-
couple, or the internal A or B wires of the platinum RTD are disconnected.
In this case, the input data becomes “E039.” However, be careful not to
confuse the B wire of the platinum RTD with the B’ wire leading out from
the same sensor. If the B’ wire is disconnected, the input data will be
FFFF.
2. When returning the C200H-TS001/002 Temperature Sensor for repair,
assemble the main body of the Unit to the terminal block connector (as
originally delivered.)
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