gefran VDI100 Series Instruction Manual page 268

Code Parameter Name / Range
20-19 Overspeed (OS) selection
0: Deceleration to stop
1: Coast to stop
2: Continue to operate
20-20 Overspeed (OS) detection level
0~120 %
20-21 Overspeed (OS) detection time
0.0~2.0 sec
20-22 Speed deviation (DEV) selection
0: Deceleration to stop
1: Coast to stop
2: Continue to operate
20-23 Speed deviation (DEV) detection level
0~50 %
20-24 Speed deviation (DEV) detection time
0.0~10.0 sec
20-25 Selection of PG Open
0: Deceleration to stop
1: Coast to stop
2: Continue to operate
20-26 Detection time of PG Open
0.0~10.0 s
20-27 PG pulse number
0~60000 ppr
20-28 Selection of PG rotation direction
0: Forward as counter -clockwise rotation
1: Forward as clockwise rotation
20-29 PG pulse dividing ratio
001~132
20-30 PG gear ratio 1
1~1000
20-31 PG gear ratio 2
1~1000
• PG card is required (EXP-OC-VDI100 / EXP-LD-VDI100 / EXP-LD-PM-VDI100): PG pulse divider ratio can
be set parameter 20-29.
• PG feedback setting
(1) Over speed operation setting (20-19 to 20-21)
a) When the motor speed exceeds the tuning limit, an error is detected.
If the motor speed feedback exceeds the value of 20-20 (overspeed detection level) for the time specified in
20-12 (over speed detection delay time) an over-speed (OS) condition is detected.
b) Overspeed detection selection (20-19) specifies the stop method for the inverter in case of an overspeed
condition.
(2) PG Speed deviation setting (20-22 to 20-24)
a) When the speed deviation (difference between the set speed and the actual motor speed) exceeds the
tuning limit, an error is detected.
b) If the speed deviation is greater than the value of 20-23 (deviation detection level) for the time specified in
20-24 (deviation detection delay time), a speed deviation (DEV) is detected.
c) Speed deviation is based on the reference frequency ± speed deviation width, parameter 20-23.
d) Speed deviation detection selection (20-22) specifies the stop method for the inverter in case of a speed
deviation condition.
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VDI100 • Instruction manual