YASKAWA Varispeed G7 Series Instruction Manual page 247

The operation after stopping depends on the setting of b1-05 when flux vector control is selected (A1-02 = 3).
Run Command OFF
Frequency reference
via analog input
0
(frequency reference)
b1-05=1
(Coast)
b1-05=2
(Run on E1-09)
b1-05=3
(Zero-speed)
Setting Precautions
When using flux vector control, the zero-speed control starts when motor speed drops to b2-01 during
•
deceleration. Also, the setting b2-01 < E1-09 is possible.
The current level during injection brake time at start is the value of E2-03 (motor no-load current). Accord-
•
ingly, b2-02 is invalid in flux vector control.
Coast to Stop
If the Stop Command is input (i.e., the Run Command is turned OFF) when b1-03 is set to 1, the Inverter out-
put voltage is interrupted. The motor coasts to a stop at the deceleration rate that counterbalances damage to
the machine and inertia including the load.
-14
6
b1-05=0
Injection brake
time at start
b2-03
Baseblock
Injection brake
time at start
Baseblock
b2-03
Injection brake
time at start
Baseblock
b2-03
Injection brake
time at start
Baseblock
b2-03
Fig 6.14 Deceleration to Stop (for Flux Vector Control)
Run Command
Output frequency
ON
Zero speed
control
b2-04
ON
OFF
Inverter output freqeuencty interrupted.
Fig 6.15 Coast to Stop
OFF
E1-09
Run Command turns OFF
and zero-speed control start
when motor speed drops to b2-01.
Zero speed
control
Baseblock
b2-04
Frequency reference drops to less
than E1-09 and zero-speed control
starts when motor speed drops to
b2-01.
Baseblock
Run Command turns OFF
and zero-speed control start
when motor speed drops to b2-01.
Zero speed control
Baseblock
b2-04
Run Command turns OFF
and zero-speed control start
when motor speed drops to b2-01.
Zero speed control
Baseblock
b2-04