5-27
5-7 Setting the Acceleration/Deceleration Time
The following description provides information on parameters related to
acceleration and deceleration time settings.
Trapezoidal and S-shape acceleration and deceleration are available.
Using the S-shape characteristic function for acceleration and decelera-
tion can reduce shock to the machinery when stopping or starting.
H Acceleration/Deceleration Time Unit (n018)
·The acceleration and deceleration time of the Inverter can be set within a range from
0.0 to 6,000 s without changing the default setting. If a more precise unit of setting is
required, this parameter can be set for 0.01-s increments. In this case, the setting
range will be from 0.00 to 600.0 s.
n018 Acceleration/Deceleration
Time Setting
Register 0112
Hex
Changes during
operation
No
Setting
range
0, 1 Unit of
setting
1 Default setting 0
Set Values
Value Description
0 Less than 1,000 s: 0.1-s increments
1,000 s or over: 1-s increments
1 Less than 100 s: 0.01-s increments
100 s or over: 0.1-s increments
H Setting the Acceleration/Deceleration Time (n019 through
n022)
·Two acceleration times and two deceleration times can be set.
·The acceleration time is thetimerequiredto go from 0%to 100% ofthe maximumfre-
quency and the deceleration time is the time required to go from 100% to 0% of the
maximumfrequency.Theactualaccelerationordecelerationtimeisobtainedfromthe
following formula.
Acceleration/Deceleration time = (Acceleration/Deceleration time set value)
´ (Frequencyreferencevalue)¸ (Max.frequency)
Acceleration time 2 and deceleration time 2 are enabled by setting 11 for acceleration/
deceleration time selection in any of the n050 through n056 parameters for multi-func-
tion input.
Deceleration time 2 is also enabled by emergency-stop settings 19, 20, 21, and 22 in
any of the parameters for parameters n050 through n056 for multi-function input with
n005 for interruption mode selection set to 0 (i.e., deceleration stop).
Basic Operation Chapter 5
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