54
SANTERNO
USER MANUAL
Start
Reverse running
Let frequency set negative
Set reverse allowed
Control mode:
Remote (Level mode)
Set mode: Analog/DI
Turn off analog
set terminal
Reverse running
Set reverse allowed
Control mode:
Upper/Local/Remote
Set mode:
Com/Local
Figure 5-24 Flow chart of reverse rotation
Attention
!
●
Centrifugal Fan and water pump are not allowed to reverse rotating.
5.3.7 Motor Rated Frequency and Voltage
Rated voltage: the output line voltage of the VFD when running at the motor rated frequency.
Figure 5-25 Relationship diagram between rated frequency and voltage of the motor
Rated voltage
Output voltage
Output frequency
Max frequency
Reference frequency
● Local set or upper set: Set the frequency to a negative value by HMI or upper computer then VFD can start
reversed running. If the control mode set to remote control and the remote start and stop mode set to the level
mode, then start/stop control is initiated through the level positive start/ stop signal on I/O board.
● Analog set or DI set: Set the control mode to remote control and remote start/stop mode to level mode then
control the reverse start and stop of motor by the reverse level start and stop on interface terminals.
Attention
!
● If the rated voltage of motor set is comparatively small, VFD will be derating running.
● If the rated voltage of motor set is comparatively large, then it will lead the over-saturation of motor iron
core, the efficiency will be reduced, the temperature will be raised.