YOKOGAWA UT55A - Page 356

16-5
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
calcula-
tion
Control
compu-
tation
Control
output
Retrans-
mission
output
Alarm
action
Analog out-
put(control
output,
retransmis-
sionoutput)
Voltage
pul
se output
(control
output)
Relay output
(controlout-
put
, position
proportional
output)
Feedback
input
(forPosition
proportional
type)
Contact
input
Contact
(alarm)
output
Com-
munica-
tion
Analog input terminal ADC error
•
PVinput
• RSP
input (E1-terminal area)
• AIN2 input (E2-terminal area)
• AIN4 input (E4-terminal area)
105%
Normal
action
Normal
action
When in
AUTO and
RUN modes:
Error preset
output
When in MAN
mode: MAN
output
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Universal input terminal RJC
error
•PVinput
• RSP
input (E1-terminal area)
Normal action
(without reference
junctioncompensation)
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Analog input terminal burnout
error
•PVinput
• RSP
input (E1- terminal area)
• AIN2 input (E2-terminal area)
• AIN4 input (E4-terminal area)
Depends on the
parameter BSL.
Upscale:105%
Downscale:-5%
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
PV

inputburnout
error
(Loop1, Loop2)
Depends on the setting
of the parameter BSL
of the analog terminal
connectedtothe
PV
where the error occurs.
Upscale:105%
Downscale:-5%
When in
AUTO and
RUN modes:
Error preset
output
When in MAN
mode: MAN
output
PVinputover-scale
PVinputunder-scale
(PVvaluesoutof-5to105%)
(Loop1, Loop 2)
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
RSP input burnout error
(Loop 1, Loop 2)
Depends on the setting
of the parameter BSL
of the analog terminal
connected to the RSP
where the error occurs.
Upscale:105%
Downscale:-5%
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