CALIBRATION
MANUAL TUNING (FUNCTION CODE 55)
I-E96-322A
4 - 5
The 100% to 0% cycle repeats the number of calibration cycles
specified in <S9>. After recording the final 0% reading, the
actuator moves at the selected stroke time to the position
demand from the MFP module. When the calibration cycles are
complete, the actuator ramps to the position demand from the
MFP module if the IMHSS03 module is in the automatic tuning
mode. In manual tuning mode, the actuator ramps to its preca-
libration position when the calibration cycles are complete.
Allow the cycle to complete. After completion of all cycles, the
calibrated differential voltages are written to HSS module
dual-port RAM.
6. Observe the module status output block N+6, bits 0 and 1.
The binary value of these bits is 0 while the LVDT calibration is
in progress. When the calibration is complete, these bits have a
binary value of 1.
If a binary 2 appears in the module status bits, then an error
has occurred during the calibration procedure. All outputs will
show bad quality and the HSS module will retain the previous
calibration values. The other error bits in the module status
output blocks N+6 and the LVDT status output blocks N+7 will
show which error has occurred. Refer to
and Table
for corrective action. After correcting the error, repeat the
calibration procedure.
NOTE: To clear the calibration error status and bad output qualities
without performing another calibration, set calibrate mode to dis-
able, <S11> = 0.
If the calibration was successful, the MFP reads the new differ-
ential voltages from the HSS module. These new values are
written to function code 55 specifications S18 through S21.
Refer to
to tune the controller gain.
MANUAL TUNING (FUNCTION CODE 55)
The following procedures are for manually tuning demodulator
gain and controller gain using function code 55.
Demodulator Gain
To start demodulator tuning, the MFP module must be com-
municating with the HSS module and the following conditions
must be met:
•
The demodulator gain must be set to a value of one.
•
The controller gain must be set to a value of one.
•
The turbine is off-line.