Troubleshooting Autotuning - GE FVP110 Maintenance Manual

Troubleshooting AutoTuning

Troubleshooting AutoTuning

Problem
Auto tuning requests are
rejected.
When auto tuning has
finished,
AUTO_TUNE_RESULT
changes value to an index
from 21 to 23.
When auto tuning has
finished,
AUTO_TUNE_RESULT
changes value to index 40
or 120.
When auto tuning has
finished,
AUTO_TUNE_RESULT
changes value to an index
from 42 to 44, or from 120
to 123.
When auto tuning has
finished,
AUTO_TUNE_RESULT
changes value to an index
from 60 to 62, or from 100
to 103.
When auto tuning has
finished,
AUTO_TUNE_RESULT
changes value to an index
from 60 to 62, or from 120
to 123.
Table 58 Troubleshooting AutoTuning
Presumed Cause
Either or both of the A/O block
and transducer block are not in
O/S mode.
There is something wrong with
the air supply pressure or
spring range.
There is something wrong with
the operation point of the I/P
module.
SERVO_OFFSET could not
be measured.
The measured time delay
constant, hysteresis, and/or
slip width of the valve is
excessively large.
The span of rotation angle is
incorrect or the 50% position
deviation from the horizontal
level is too large.
The valve hysteresis is large.
Remedy
Change the target modes
of the AO and transducer
block to O/S.
Check whether the
measured pressure
reading nearly equals the
actual pressure. See the
descriptions for auto
tuning.
If there is nothing wrong
with the air supply
pressure and piping,
contact the nearest
service station or
representative office.
Check whether they meet
the characteristics
specified for the valve.
See the descriptions for
auto tuning.
Correct the installation and
try auto tuning again.
Carry out manual tuning.
181
Troubleshooting
See Section
"Function Block
Parameters" on
page 183
❑
"Carrying out
Tuning" on
page 61
❑
"Auto Tuning"
on page 126
—
❑
"Carrying out
Tuning" on
page 61
❑
"Auto Tuning"
on page 126
❑ "Installing the
FVP110 on the
Actuator" on
page 35
❑ "Carrying out
Tuning" on
page 61
"Manual Tuning
Guideline" on
page 253