YOKOGAWA UT750 User Manual

4-2
<Toc> <4. Troubleshooting and Maintenance>
IM 05D01B02-41E
■ Errors at Power on
The following table shows errors that may be detected by the fault diagnosis function when
the power is turned on.
Display
position
Description
of error
Remedy
Faulty RAM
Faulty ROM
System data error
Faulty calibration
value
PV
Control
output
Alarm
output
Retransmission
output
Communication
None OFF 0% or less
Undefined
0% or less
or OFF
Undefined Undefined
Normal
action
Faulty
Contact us
for repair.
Check and
set the
initialized
parameters.
Normal action
(out of
accuracy)
Normal action
(out of
accuracy)
Normal action
(out of
accuracy)
Normal action
(out of
accuracy)
LCD
Parameter error
Normal action
0% or less
or OFF
Normal action Normal action
PV-
indicating
LED
Error indication
PV decimal point blinks.
Error code
(See description below.)
E000
E001
E002
Stopped
An error code is displayed in the event of an error, according to its type.
An error code is a two-digit figure in which a combination of 6 bits of on and off is converted
into a decimal number.
The following shows the relationship between each bit and parameter to be checked for
abnormality.
Bit No.
65432
1
0
Parameter to be checked Operation mode/output Operating parameters Setup parameters Range data Calibration data UT mode Custom computing data
For example, if an error occurs with the operating parameter and calibration data, the error
code will be as follows:
2
Setpoint display unit
Error code 21 is displayed.
Bit No. 6–
–
543210
Error Code
2
2
2
1
2
0
2
3
2
2
2
1
2
0
1
12
1st Edition : May 31,2000-00

YOKOGAWA UT750 Specifications

General

Brand	YOKOGAWA
Model	UT750
Category	Controller
Language	English