YOKOGAWA UT55A - Page 360

16-9
IM 05P01C31-01EN
Troubleshooting,Maintenance,andInspections
16
Errors during Operation (Input/output Action)
Error
description
PVinput,RSP
input, and aux.
analog input
Ladder calcu-
lation
Control
compu
-
tation
Control
output
Retrans-
mission
output
Alarm
action
Analog out-
put(control
output,
retrans-
mission

output)
Voltage
pulse out-
put
(control
output)
Relay out-
put
(control
output,
position
proportion-
al
output)
Feedback
input
(for
Position
proportion-
altype)
Contact
input
Contact
(alarm)
output
Com-
munica
-
tion
Peer-to-peer communication
error
Normal action
Normal action
(However, the
peer-to-peer
communication
register is not
updated.)
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Auto-tuning time-out
(Loop 1, Loop 2)
Normal action Normal action
Auto-
tuning
stopped,
normal
action
Auto-
tuning
stopped,
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Automatic valve position
adjustment
error
Normal action Normal action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
–
Normal
action
105%
Normal
action
Normal
action
Normal
action
Communication error
(RS485 communication)
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
Communication error
(coordinated operation)
Inconsistence of loop between
coordinated master and slaves
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
Communication error
(coordinated operation)
Communication from
coordinated master is
interrupted for 2 seconds.
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
User
proleerror Normal action
Normal action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
PROFIBUS-
DP/DeviceNet/
CC-Link
communication
is disabled
Faulty FRAM 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
16.1Troubleshooting