gefran VDI100 Series Instruction Manual page 195

frequency
07-09=3: Coast to stop with timer
When a stop command is issued the motor will coast to a stop after the minimum Baseblock time (07-18) has
expired. The inverter ignores the run command until the total time of the timer has expired.
The total time of the timer is determined by the deceleration time (00-15, 17, 22 or 24) and the output frequency
upon stop. Refer to Figure 4.4.61
frequency
Code Parameter Name / Range
07-13 Low voltage detection level
200V: 150~210Vdc
400V: 300~420Vdc
07-25 Low voltage detection time
0.00~1.00 s
Adjust the 07-13 voltage level from 150 to 300 Vdc (230V class) or from250 to 600 Vdc (400V class).
When the AC input voltage is lower than the 07-13 value (07-13/ 1.414 = AC voltage detection level) for the
time specified in 07-25 the low-voltage error "UV" will displayed. If 07-25 = 0.00 sec., the UV error will be dis-
played immediately.
Set preventive measures:
- The inverter input voltage will limit the output voltage. If the input voltage drops excessively, or if the load is
too big, the motor may stall.
- If the input voltage drops below the value set in 07-13 then the output is turned off momentarily. The inverter
will not automatically start when power is restored.
Code Parameter Name / Range
07-14 Pre-excitation time
0.00~10.00 s
VDI100 • Instruction manual
Output
Stop
Run
tb.b t
DCDB
tb.b :Minimum baseblock time (07 -18)
t :DC braking time
DCDB
Run Stop Run Stop
Output
T1
T1：Total Time
Figure 4.4.60 DC braking to stop
t
DCDB
07-08 × 10
Time
07-08 × 1
Time
10
%
Figure 4.4.61 Coast to stop with timer
T1
Deceleration
Run
Time
Time
(e.g. 00-15)
Min.
baseblock
Time
Time t
b.b
(07-18)
Output frequency
upon stop command
100
%
Maximum output
frequency
(Fmax, 01- 02)
Output frequency
upon stop command
10% 100%
Maximum output
frequency
(Fmax, 01- 02)
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