Yaskawa VS-616PS5 Series Programming Manual - Manual (Page 11)

VS-616PS5 Programming Manual 11
• Ramp to Stop (B1-03 = “0”)
Upon removal of the FWD (REV) run command, the motor decelerates at a rate
determined by the time set in deceleration time 1 (C1-02) and baseblocks upon
reaching the zero speed level (B2-01) or minimum speed (E1-08), whichever is
higher. If the deceleration time setting is too short or the load inertia is large, an over-
voltage fault (OV) may occur during deceleration. In this case, increase the decelera-
tion time or install an optional braking transistor and/or braking resistor (braking
transistors are provided as standard for units 230V 7.5kW and smaller, 460V 15kW
and smaller).
Braking torque: without braking resistor, approximately 5% of motor rated torque
with braking option, approximately 150% of motor rated torque
• Coast to Stop (B1-03 = “1”)
Upon removal of the FWD (REV) run command, the motor starts to coast. Upon re-
applying the run command operation will resume after the minimum baseblock time
(L2-03) elapses.
Coast to Stop with Timer 1 (B1-03 = “3”) should be used to prohibit the inverter from
starting into a rotating motor. When setting B1-03=3, the deceleration time (C1-02) is
used as the timer during which operation is prohibited.
Output Frequency
Decel time 1 (C1-02)
Run Command
ON
OFF
Zero Speed Level
Figure 1 Stopping Method - Ramp to Stop
Factory Default 0.5Hz
Run command
ON
OFF
Output frequency Inverter output is shut OFF
when stop command is given.
Figure 2 Stopping Method - Coast to Stop
Section B: Application Parameters
B1 Sequence