Servo_Offset; Boost_On_Threshold [1], [2]; Boost_Off_Threshold [1], [2]; Boost_Value [1], [2] - GE FVP110 Maintenance Manual

SERVO_OFFSET

SERVO_OFFSET
Tuning range: 0 to 100% of MV (Default: 55%)
Set the initial value for the electric current that is output from the CPU to the I/P module
after the power is turned on. The value simultaneously serves as the base point for an
integration operation.
The unit of this parameter is % of the current output to the I/P module.
The value is usually determined by Auto Tuning, so you do not need to change the
value.
If you manually set a value, input a value of SERVO_OUTPUT_SIGNAL when the valve
position settles in the vicinity of 50%.

BOOST_ON_THRESHOLD [1], [2]

Tuning range: 0, 0.1 to 10% (Default: 1.9, 2.9%)

BOOST_OFF_THRESHOLD [1], [2]

Tuning range: 0.1 to 10% (Default: 1.0, 1.0%)

BOOST_VALUE [1], [2]

Tuning range: 0 to 50% of MV (Default: 8, 10% of MV)
Set the boost function that serves as a function for accelerating air delivery and
exhaust. Tracking capability for response after an input change increases.
When the set point is changed, if the difference between the old set point and the new
set point is greater than the BOOST_ON_THRESHOLD, the BOOST_VALUE is added
to the current output to the I/P module, and the added value is removed when the
deviation enters the range of BOOST_OFF_THRESHOLD.
However, each parameter has two values, [1] and [2], where [1] is for a small step and
[2] for a large step. Therefore, set each parameter so that the relation [2] . [1] is
established.
If the difference between the old set point and the new set point is greater than
BOOST_ON_THRESHOLD[1] and less than [2], BOOST_VALUE[1] functions, and the
added value is removed when the deviation enters the range of
BOOST_OFF_THRESHOLD[1].
Figure 90 Boost Threshold 1
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Manual Tuning Guideline