YOKOGAWA UP35A, User Manual

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16-7
IM 05P02D41-01EN
Troubleshooting, Maintenance, and Inspections
16
Errors during operation (Input/output Action)
Error
description
PV input
Ladder
calcula-
tion
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
Commu-
nication
Feedback input
resistor/current burnout Normal action
Normal
action
Normal
action
Normal action
Normal
action
Normal
action
Normal
action
-
Position
proportional
output: OFF
105%
Normal
action
Normal
action
Normal
action
Ladder calculation
overflow
Normal action
Undefined
(calculation
with max.
value)
Normal
action
Normal action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Load factor is over
100%
Normal action
Does
not work
according to
the control
period.
Does
not work
according
to the
control
period.
Does not work
according to the
control period.
Does
not work
according
to the
control
period.
Does
not work
according
to the
control
period.
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
The
response
from the
main unit
slows.
Load factor is over
200%. (Forced
termination)
Normal action
Forced end
at 200%
Does
not work
according
to the
control
period.
Does not work
according to the
control period.
Does
not work
according
to the
control
period.
Does
not work
according
to the
control
period.
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Ladder program error Normal action
Undefined
(Stopped
at the error
detection)
Normal
action
Normal action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
Normal
action
16.1 T
roubleshooting