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Explanation of functions (parameters)
2.3.5 Acceleration/deceleration time (Pr. 7 , Pr. 8 ,
Pr. 20 , Pr. 44 , Pr. 45 )
CAUTION
1. The multi-speed settings override the main speeds (across terminals 2-5, 4-
5, setting dial). When the multi-speed settings and setting dial are used in
the combined operation mode (Pr. 79 = 3), the multi-speed settings have
precedence.
2. The multi-speeds can also be set in the PU or external operation mode.
3. For 3-speed setting, if two or three speeds are simultaneously selected,
priority is given to the set frequency of the lower signal.
4. Pr. 24 to Pr. 27 and Pr. 80 to Pr. 87 settings have no priority between them.
5. The parameter values can be changed during operation.
6. When using this function with the jog signal, the jog signal has precedence.
REMARKS
The frequency-set external terminals have the following priority:
Jog > multi-speed operation > AU (terminal 4) > terminal 2
♦Related parameters♦
•
Maximum, minimum frequency setting ⇒ Pr. 1 "maximum frequency", Pr. 2 "minimum frequency"
(refer to page 74)
• Assignment of signals RH, RM, RL, REX to terminals ⇒ Pr. 60 to Pr. 63 (input terminal function
selection) (refer to page 109)
• External operation mode setting ⇒ Pr. 79 "operation mode selection" (refer to page 120)
• Computer link mode ⇒ Pr. 79 "operation mode selection" (refer to page 120), communication
parameter n10 "link startup mode selection" (refer to page 159)
• Speed command source ⇒ Communication parameter n9 "speed command source"
(refer to page 158)
Used to set motor acceleration/
deceleration time.
Set a larger value for a slower
speed increase/decrease or a
smaller value for a faster speed
increase/decrease.
Parameter Name
Factory
Setting
Setting
Range
Remarks
7 Acceleration time 10s/30s 0 to 999s 7.5K or less: 5s, 11K or more: 15s
8 Deceleration time 5s 0 to 999s 7.5K or less: 10s, 11K or more: 30s
20
Acceleration/
deceleration reference
frequency
60Hz 1 to 120Hz
Setting is enabled when
Pr. 30 = "1".
44
Second acceleration/
deceleration time
5s 0 to 999s
Setting is enabled when
Pr. 30 = "1".
45
Second deceleration
time
- - -
0 to 999s,
- - -
- - -:
acceleration time=
deceleration time.
Setting is
enabled when
Pr. 30 = "1".
Running
frequency
Acceleration
time
Deceleration
time
Time
Pr.20
Output frequency (Hz
)
Pr.7
Pr.44
Pr.8
Pr.45
Acceleration Deceleration
Constant speed