Fuji Electric FRENIC-VG Series, User Manual

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6.10.5 Adjustment method
• The synchro interface's internal switches and knobs are pre-adjusted at the factory. Never touch knobs,
switches, or other adjustments other than those designed to be adjusted or set by the user.
6.10.5.1 Description of adjustment locations
Table 6.10.3
Adjustment
location
Name Adjustment description
1-2 shorted: Bias voltage (+)
SC1 Bias load switching
2-3 shorted: Bias voltage (-)
VR1
Potential auxiliary input
signal adjustment Adjusts the potential auxiliary input signal from 0 V to voltage
input (S1).
VR2
Synchro transmitter output
adjustment Adjusts synchro transmitter output using voltage division.
VR3 Bias adjustment Adjusts the bias voltage (as selected with SC1) (0 V to ±10.7 V).
VR4
Position meter output
adjustment Adjusts position meter output from -10 V to +10 V (gain 0.7 to
1.77).
Adjustment locations
Figure 6.10.5 Adjustment Locations
• Fuji factory adjustment settings
SC1: The unit ships with 1-2 shorted.
VR1: The unit is adjusted to yield a CH1 voltage of -10 V (so that the amp gain is 1) when the
potential auxiliary input signal (S1) is +10 V.
VR2: The unit is adjusted to yield voltage output (S4) of ±10 V DC with input of 78 V AC, assuming
that synchro transmitter output is 78 V AC with an operating angle of ±60°C.
VR3: The unit ships with a 0 notch setting (CH3 voltage: 0 V).
VR4: The unit is adjusted so that voltage output (S5) is the same as voltage output (with an output
stage amp gain of 1).
SC1
VR4
VR1
VR2
VR3
CH3
CH2
CH1
SY1 S1 S2 UH
SY S3 S4 V UL
2
3
1