WARNING! When 3-Wire sequence is used, set the drive to 3-Wire sequence before wiring the control
terminals and ensure parameter b1-17 is set
to 0 (drive does not accept a run command at power up (default)).
If the drive is wired for 3-Wire sequence but set up for 2-Wire sequence (default) and if parameter b1-17 is
set to 1 (drive accepts a Run command at power up), the motor will rotate in reverse direction at power up of
the drive and may cause injury.
Note: Refer to Parameter List on page 197 for a list of digital input functions. After performing a 3-wire
initialization (A1-03 = “3”), the drive will automatically assign the forward/reverse command to terminal
S5.
Note: Run by Turning on/off the Power Supply. For safety reasons, the drive is initially set up not to accept a run
command at power up (b1-17 = "0"). If a run command is issued at power up, the RUN indicator LED will
flash quickly. To change this and have the run command issued by the drive, change parameter b1-17 to 1.
u
Stopping Method Selection: b1-03
When a Stop command is issued, the drive stops the motor using one of two possible methods.
n
Ramp to Stop: b1-03 = 0
When b1-03 = 0, the motor will decelerate to a stop when a stop command is entered. The
deceleration time is set by C1-02 (Deceleration Time 1). Refer to Acceleration/Deceleration:
C1-01 to C1-04 on page 92.
When the output frequency falls below E1-09 (Minimum Output Frequency) during
deceleration, the DC Injection braking current (b2-02) will be activated for the specified DC
Injection time at stop (b2-04).
Run Command
Decelerates according to the
specified deceleration time
Minimum Output Freq.
(E1-09)
DC Injection
Current (b2-02)
DC Braking
Time at Stop (b2-04)
Decel Time
(C1-02, etc.)
Output Frequency
DC Injection Braking
ON OFF
Figure 4.11 Ramp to Stop
n
Coast to Stop: b1-03 = 1
When the run command is removed, the
drive will shut off its output and the motor will coast
(uncontrolled deceleration). The motor will coast to a stop at the rate determined by the load
inertia.
4.5 Basic Operation
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
91
4
Start-Up Programming
& Operation
2/6/2008-14:44
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