Reducing Shock During Elevating Machine Start, Stop, Acceleration, And Deceleration - Omron SYSDRIVE RV Series User Manual

Reducing Shock during Elevating Machine Start, Stop, Acceleration, and
Deceleration
When the riding comfort during start, stop, acceleration, and deceleration is of high importance, as it is for ele-
vators in which people ride, adjust the following parameters.
S-curve Characteristics, Acceleration/Deceleration Times
C2-02
Output frequency
C2-01
Acceleration time
1. The factory setting for C2-04 (S-curve characteristic time at deceleration end) is 0.00 second, while the fac-
tory setting for all other S-curve characteristic times is 0.20 second. Make appropriate settings for the
accel/decel times and S-curve characteristic times at each point. (S-curve characteristic time = Approxi-
mately 0.2 to 1.0 second)
IMPORTANT
2. The accel/decel rate can be automatically switched during acceleration and deceleration by using C1-11
(Accel/decel time switching frequency). (Factory setting: Disabled)
Output frequency ≥ set frequency: C1-01, C1-02 accel/decel times
Output frequency < set frequency: C1-07, C1-08 accel/decel times
3. If the output frequency during the S-curve characteristic time for deceleration falls below the value set for
E1-09 (Min. output frequency), the S-curve characteristic will be cancelled, and the DC injection braking
(Zero-speed control) will be applied.
4. Do not use the S-curve characteristic for applications where a short run time is desired, such as in cranes
and hoists. (S-curve characteristic time = Approximately 0.0 to 0.2 second)
Dwell Function at Start
b6-02
(Dwell time at start)
Output frequency
Frequency detection
2 or During run 2
Holding brake
operation
If the mechanical operation of the holding brake is slow, use the dwell function at start to prevent brake wear,
and accelerate after the brake is completely open.
1. When using open-loop vector control and V/f control, set b6-01 (Dwell frequency at start) higher than fre-
quency detection 2 (frequency when brakes open).
2. If the motor tends to have insufficient torque when started, use the DC injection braking function to allow
sufficient motor current (torque) before starting.
IMPORTANT
• b2-03 (DC injection braking time at start): 0.2 to 0.5 s
• b2-02 (DC injection braking current): 50% to 80% (open-loop vector control, V/f control only)
(High speed)
C2-03
(Low speed)
C2-03
C2-04
Deceleration time
(High speed)
0.1 to 0.3 sec
b6-01 (Dwell frequency at start) 0.1 to 3.0 Hz
OFF
ON
OPEN
CLOSE
Using Inverters for Elevating Machines
C2-04
DC injection braking when stopping
(Zero-speed control for flux vector control)
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