Fuji Electric FRENIC-VG Series - Installing and Adjusting the Synchro Interface

6.10 Synchro Interface
6-215
Chap. 6
CONTROL OPTIONS
6.10.5.2 Installing and adjusting the synchro interface
Refer to Section 6.1.4 "Installing internal options (OPC-VG1-)" before performing wiring or
connection work.
• Performing connection work in an inappropriate manner may result in electric shock, fire, or other damage.
Qualified electricians should carry out wiring. When touching electrical circuits, for example when performing
connection work after the unit has been energized, shut off the power supply's circuit breaker to prevent
electric shock.
The smoothing capacitor remains charged even when the circuit breaker is shut off and will cause an electric
shock when touched. Verify that the inverter's charge lamp ("CHARGE") has turned off and use a tester or
other instrument to verify that the inverter's DC voltage has fallen to a safe level.
• Do not use products with damaged or missing parts. Doing so may result in bodily injury or damage.
• Inappropriate installation or removal of the product may cause damage to the product.
Place the MCA (standalone type) vertically with the connection terminals facing down near the inverter and
connect wiring so as to protect signals from noise.
• Install the controlled device so that the synchro transmitter's output increases as the speed increases.
(The voltage output S4 provides the maximum compensation to increase the speed at positive polarity
[+10 V].) To change the polarity, change the SY1 and SY2 connections.
• When installing the synchro transmitter on a piece of machinery, adjust the angle so that the synchro
output is 0 V at the center of the synchro movable shaft's maximum span of motion. After adjusting
the configuration with VR2 so that the voltage output (S4) is 10 V DC in the maximum
speed-increasing direction, verify that the voltage output (S4) is -10 V DC (±0.5 V) in the maximum
speed-decreasing direction.
• Refer to the following figures since the speed-increasing direction changes based on the location in
which the synchro transmitter is installed (relative to the inverter). (When performing winding control,
see Figure 6.10.6; when performing rewinding control, see Figure 6.10.7.)
Figure 6.10.6 Figure 6.10.7
Inverter
unit
Inverter
unit
OPC-VG1-SN
MCA-VG1-SN
OPC-VG1-SN
MCA-VG1-SN
Synchro
transmitter
Synchro
transmitter
A direction
B direction
A direction
B direction
The B direction is the
speed-increasing position.
The A direction is the
speed-increasing position.