YOKOGAWA VZ20X, User Manual

Page: 139 / 158

9-4
IM 77V01B01-01EN 5th Edition: 2023.03.07-00
9.3. Troubleshooting Methods
YES
NO
NO
YES
Main unit status LED does not light
Connect correctly
Supply power matched to
specification voltage
･
Power terminal: Rated voltage
24 VDC
･
USB power supply: USB
Type-C
Is power supply
correctly connected?
Service is required.
Contact your nearest
YOKOGAWA dealer.
YES
NO
NO
YES
Device does not operate correctly
Lights (red), Flashes (red):
Service is required.
Contact your nearest
YOKOGAWA dealer.
Flashes (green):
Parameters have been
initialized. Set communication
parameters again.
Lights (blue):
At power supply on: the time
has not been set. 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.”
During Operation: The time has
not been synchronized. Please
check the wiring and settings.
Check communication related
troubleshooting.
NO
Flashes
(green)
YES
NO
YES
Correctly program the user
program.
Is content of user
program correct?
Service is required.
Contact your nearest
YOKOGAWA dealer.