Appendix

14. Replacement Data
When replacing the former inverters (VG, VG3, VG5) with VG7, please refer to this section.
14.1 Classification of Replacement
A: Both inverter and
motor are replaced.
B: Only the inverter is
replaced.
C: Only the motor is
replaced.
Inverter Motor Possibility
VG5 ⇒ VG7S VG ⇒ VG7 Possible
VG3/VG3N ⇒ VG7S VG3 ⇒ VG7 Possible
VG5S/VG5N ⇒ VG7S
VG5 ⇒ VG7
(Same product)
Possible
VG5 ⇒ VG7S VG Possible (Note1)
VG3/VG3N ⇒ VG7S VG3 Possible (Note1)
VG5S/VG5N ⇒ VG7S VG5 Possible
VG VG ⇒ VG7 Impossible (Note2)
VG3 VG3 ⇒ VG7 Impossible (Note2)
VG5
VG5 ⇒ VG7
(Same product)
Possible
Note 1: The rated current of VG and VG3 is bigger than that of VG5,VG7. For this reason, the inverter in
one-rank upper grade is required if only the inverter is changed from VG or VG3.
Note 2: For VG and VG3, the maximum output voltage, to which the stable current control is possible, is
lower than that of VG5 and VG7. Therefore, if these inverters are combined with VG5 or VG7
motors, the characteristics (torque accuracy or motor wow) at around the base speed or at higher
speed will deteriorate.
Note 3: Because the encoder pulse count of VG is 512P/R, operation is impossible if the VG7 motor
encoder pulse count setting (P28) is different.
14-1