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Basic functions (Pr. 0 to Pr. 9)
PARAMETERS
3
<Setting>
• Use Pr. 21 to set the acceleration/deceleration time and minimum setting range.
Value "0" (factory setting) 0 to 3600s (minimum setting increments: 0.1s)
Value "1" 0 to 360s (minimum setting increments: 0.01s)
Changing the Pr. 21 value changes the setting of Pr. 7, Pr. 8, Pr. 44, Pr. 45, Pr. 110 and Pr. 111.
• Use Pr. 7, Pr. 44 and Pr. 110 to set the acceleration time taken to reach the speed set in Pr. 20 from 0r/min.
• Use Pr. 8, Pr. 45 and Pr. 111 to set the deceleration time taken to reach 0r/min from the speed set in Pr. 20.
• Use Pr. 180 to Pr. 183 and Pr. 187 to assign the terminals used to input the RT and X9 signals.
Parameter Name Factory Setting
Setting
Range
Remarks
7 Acceleration time
5s/15s
(5.5K or less/7.5K or
more)
0 to 3600s
Simple mode
0 to 360s
8 Deceleration time
5s/15s
(5.5K or less/7.5K or
more)
0 to 3600s
Simple mode
0 to 360s
20
Acceleration/
deceleration
reference speed
1500r/min
1 to 3600
r/min
Extended mode
21
Acceleration/
deceleration time
increments
00, 1
0: 0 to 3600s
1: 0 to 360s
Extended mode
44
Second
acceleration/
deceleration time
5s
0 to 3600s Pr. 21 = 0
Extended mode
0 to 360s Pr. 21 = 1
45
Second
deceleration time
9999
0 to 3600s Pr. 21 = 0
Extended mode
0 to 360s Pr. 21 = 1
9999
Acceleration time =
deceleration time
110
Third acceleration/
deceleration time
5s
0 to 3600s Pr. 21 = 0
Extended mode
0 to 360s Pr. 21 = 1
111
Third deceleration
time
9999
0 to 3600s Pr. 21 = 0
Extended mode
0 to 360s Pr. 21 = 1
9999
Acceleration time =
deceleration time
CAUTION
Changing the Pr. 21 setting changes the acceleration/deceleration time setting (Pr. 7, Pr. 8, Pr. 16, Pr. 44,
Pr. 45, Pr. 110, Pr. 111)
<Example>
When Pr.21="0" and the setting of Pr.7="5.0"s, and if the setting of Pr.21 is changed to "1", the setting
value of Pr.7 will change to "0.5"s.
CAUTION
• Pr. 44 and Pr. 45 are valid when the RT signal is on.
When the RT signal is on, the other second functions (Pr. 450 to Pr. 454, Pr. 815, Pr. 830 to Pr. 837) are
also valid.
• Pr. 110 and Pr. 111 are valid when the X9 signal is on.
When the X9 signal is on, Pr. 820 to Pr. 827 are also valid.
• When both RT and X9 are on, Pr. 110 and Pr. 111 are valid.
• Switching the RT and X9 signals during operation does not change the acceleration/deceleration time
imediately when position control is exercised with the conditional position control function (Pr. 419 =
"0") by the contact input.
REMARKS
• Changing the Pr. 20 "acceleration/deceleration reference speed" setting does not adjust the speed gain setting signal. To
adjust the gain, adjust the calibration function (Pr. 903).
• When the setting of Pr. 7, Pr. 8, Pr. 44, Pr. 45, Pr. 110 or Pr. 111 is 0.03 or less under V/F control, the acceleration/
deceleration time is 0.04s.
• However short the acceleration/deceleration time setting is, the actual motor acceleration/deceleration time cannot be made
shorter than the shortest acceleration/deceleration time that is determined by the mechanical system J (moment of inertia)
and the motor torque.
Related parameters
• Jog acceleration/deceleration time ⇒ Pr. 16 "jog acceleration/deceleration time" (Refer to page 85.)
• RT signal, X9 signal setting
⇒ Pr. 180 to Pr. 183, Pr. 187 (input terminal function selection) (Refer to page 150.)