4.4 Basic Parameter Adjustments
136 YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
WARNING! Sudden Movement Hazard. When using the 3-wire run/stop sequence, properly
set the digital input terminal parameter before closing the wiring for the control circuit.
Improper sequencing of run/stop circuitry could result in death or serious injury from moving
equipment.
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: For safety reasons the drive is default 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 LED will flash
quickly. Change parameter b1-17 to 1, if this Run command shall be executed by the
drive.
Note: 1. Refer to Parameter List on page 331 for a list of digital input functions.
2. After performing a 3-wire initialization (A1-03 = “3”), the drive will automatically assign
the forward/reverse command to terminal S5.
◆ Stopping Method Selection: b1-03
When a Stop command is issued, the drive stops the motor using one of four
possible methods.
■ 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 the time to ramp down from maximum frequency
(E1-04) to zero frequency. The time set in C1-02 will be used except in cases where
an alternate decel time is selected by use of parameter C1-11. Refer to
Acceleration/Deceleration C1-01 to C1-11 on page 141 for information on
deceleration time.
When the output frequency falls below the DC Injection braking start frequency
(b2-01) during deceleration, the DC Injection braking current (b2-02) will be
activated for the specified DC Injection time at stop (b2-04).
This feature can be used to aid in stopping loads where there are low frictional
losses. Refer to Figure 4.17 for further details.
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