YOKOGAWA VZ20X, User Manual

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9-1
IM 77V01B01-01EN 5th Edition: 2023.03.07-00
9. Troubleshooting
9.1 Operation When an Error Occurs and
Corrective Action
The following describes the device status when an error occurs and the corrective action
to take.
LEDs do not light simultaneously. They light according to the following order of priority.
ROM/RAM error > system error > memory device error > input hardware error > analog
input ADC error > analog input RJC sensor error > input adjustment value error >
parameter error > time retrieval error / time synchronization error > analog input burnout
error > analog input overscale/underscale
Main unit
status LED
Analog input
status LED
VZ Configurator
Device
Status
Analog input
operation
Ethernet
communication
operation
USB
communication
operation
Corrective action
Timing of
error
occurrence
Fault
diagnosis
display
Monitoring
display
Lights
(green)
Lights
(green)
- - Normal Normal
operation
Normal
operation
Normal
operation
- -
Lights
(blue)
Light out - - R1.01.04 or
earlier:
Normal (USB
on the PC side
is Type-A)
R1.02.01 or
later:
Normal (USB
on the PC side
is Type-A, and
USB Type-C
detection
setting is
"Enable")
Stop Stop Normal
operation
- -
Flashes
(green)
Lights
(green)
- - Firmware
update mode
Stop Only firmware
update is valid.
Only firmware
update is valid.
- -
Flashes
(green)
Flashes
(blue)
Lights
(green)
- - During
firmware
update
Stop - -
All out Not fixed Display not
possible
- ROM/RAM
error
Not fixed Stop Stop Failure. Ask for repair. At power
supply on
During
operation
Lights
(red)
Not fixed System
error
- System error Not fixed Stop Stop Failure. Ask for repair. At power
supply on
Lights
(red)
Lights
(green)
Memory
device
error
- Memory
device error
Normal
operation
Not fixed Not fixed Failure. Ask for repair. At power
supply on
During
operation
Flashes
(red)
Lights out at
abnormal
input channel
Lights
(green) at
normal input
Display not
possible
Analog
input
hardware
error
- Input
hardware
error
Input channel
in error not
fixed
Normal
operation
Normal
operation
Failure. Ask for repair. At power
supply on
During
operation
Flashes
(red)
Flashes
(green).
- AD error Analog input
ADC error
Input channel
in error is
105.0%
Normal
operation
Normal
operation
Failure. Ask for repair. During
operation
Flashes
(red)
Flashes
(green).
RJC error RJC error Analog input
RJC sensor
error
Normal
operation.
Operation
without RJC
compensation
Normal
operation
Normal
operation
Failure. Ask for repair. During
operation
Flashes
(red)
Flashes
(green).
Adjustment
value error
Adjustment
value error
Input
adjustment
value error
Not fixed Normal
operation
Normal
operation
Failure. Ask for repair. At power
supply on
Flashes
(green)
Lights
(green)
Parameter
error
- Parameter
error
Normal
operation
Not fixed Normal
operation
Parameter is initialized. Reset
communication parameters.
At power
supply on
Lights
(blue)
Lights
(green)
(Flashes
(green) when
burnout or
OVER)
Time
retrieval
error
- Time retrieval
error
Normal
operation
Normal
operation
Normal
operation
Time has not been retrieved.
Time stamp starts from the
default time. Please set the
time. For the time setting, see
“7.2.4 List of Register
Assignments” and “7.2.5
Outline of Modbus/TCP
Protocol.”
At power
supply on
Lights
(blue)
Lights
(green)
(Flashes
(green) when
burnout or
OVER)
Time
synchro-
nization
error
- Time
synchro-
nization error
Normal
operation
Normal
operation
Normal
operation
Time has not been
synchronized.
Check the wiring and
parameter settings.
When time can be
synchronized, the LED goes
out and control returns.
During
operation