YOKOGAWA UT350, Инструкция по эксплуатации

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4-2
<Toc> <4. Troubleshooting and Maintenance>
IM 05D01D02-41E
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Errors at Power on
The following table shows errors that may be detected by the fault diagnosis function when
the power is turned on.
(E400)
Error indication
(on PV display unit)
Description
of error
Remedy
Faulty RAM
Faulty ROM
System data error
PV decimal point blinks.
Faulty calibration
value
PV
Control
output
Alarm
output
Retransmission
output
Communi-
cation
None
OFF
0% or less Stopped
0%
0% or less
or OFF
0%
Normal
action
Faulty
Contact us
for repair.
Normal action
(out of
accuracy) Normal action
(out of
accuracy) Normal action
(out of
accuracy) Normal action
(out of
accuracy)
Parameter error 0%
Preset value
output
OFF 0%
Check and set
the parameters,
as they have
been set to the
limited values.
(E002)
(E001)
(E000)
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Possible Errors during Operation
The following shows possible errors occurring during operations.
Retransmis-
sion output
Commu-
nication
(-OVER)
(OVER) or
Error indication
(on PV display unit)
Displays “RJC”
and PV
alternately
Faulty
Contact us for repair.
Faulty
Contact us for repair.
Check wires and
sensor.
Description
of error
RJC error
EEPROM
error
A/DC error
PV burnout
error
PV
Normal action
105%
Dependent on the BSL
parameter
Up-scale: 105%
Down-scale: -5%
Measured
with RJC=0
Control
output
Normal
action
Normal
action
Preset
value
output
Preset
value
output
Alarm
output
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Remedy
Normal
action
Normal
action
Normal
action
Normal
action
PV value blinks.
Check process.
Check process. Press
any key to erase error
indication.
SP decimal
point blinks.
(on setpoint
display unit) Check wires and
communication parameters,
and make resetting.
Recovery at normal receipt
Excessive PV
Out of -5 to
105%
Auto-tuning
failure
(Time-out)
Faulty
communi-
cation line
-5% or 105%
Normal action
Normal action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
All indications off Faulty if power off/on does
not reset start the unit.
Contact us for repair.
All indications off Check for abnormal power.
Runaway (due
to defective
power or
noise)
Power off
None
None
0% or less
or OFF
0%
OFF
OFF
0% or
less
0%
Stopped
Stopped
(E200)
(B.OUT)
(E300)
■
If a Power Failure Occurs during Operation
●
Momentary Power Failures shorter than 20 ms
The controller is not affected at all and continues normal operation.
1st Edition : May 31,2000-00