Mitsubishi Electric FR-E700 Instruction Manual page 211

Parameter
Change the setting range and increments of the acceleration/deceleration time (Pr. 21)
Use Pr. 21 to set the acceleration/deceleration time and minimum setting range.
Setting "0" (initial value)............. 0 to 3600s (minimum setting increments 0.1s)
Setting "1".................................. 0 to 360s (minimum setting increments 0.01s)
b
CAUTION:
Changing the Pr. 21 setting changes the acceleration/deceleration setting (Pr. 7, Pr. 8,
Pr. 16, Pr. 44, Pr. 45).
(The Pr. 611 "Acceleration time at a restart" setting is not affected.)
Example:
When Pr. 21 = 0, setting "5.0" s in Pr. 7 and "1" in Pr. 21 automatically changes the
Pr. 7 setting to "0.5" s.
Set two kinds of acceleration/deceleration times (RT signal, Pr. 44, Pr. 45, Pr. 147)
Pr. 44 and Pr. 45 are valid when the RT signal is on, or the output frequency reaches or exceeds
the setting of Pr. 147. Switching the parameter sets allows you to operate motors with different
specifications and capabilities with the frequency inverter.
When "9999" is set to Pr. 45, the deceleration time becomes equal to the acceleration time
(Pr. 44).
For the RT signal, set "3" in any of Pr. 178 to Pr. 184 "Input terminal function selection" to assign
the function.
When RT signal is off, automatic switching of the acceleration/deceleration time is available with
Pr. 147.
0.00 Hz ≤ Pr. 147 ≤ Set frequency
Set frequency < Pr. 147
Tab. 6-5: Acceleration/deceleration times in dependence on Parameter 147
When the RT signal turns on, the acceleration/deceleration time switches to the second
acceleration/deceleration time even when the output frequency is not reached to Pr. 147
setting.
Fig. 6-30: Automatic switching of the acceleration/deceleration time
FR-E700 EC
Pr. 147
9999 (Initial value)
0.00Hz
Output frequency [Hz]
Set frequency
Acceleration time
Acceleration/Deceleration Time
Pr. 7, Pr. 8
Pr. 44, Pr. 45
Output frequency < Pr. 147:
Pr. 7, Pr. 8
Pr. 147 ≤ Output frequency:
Pr. 44, Pr. 45
Pr. 7, Pr. 8
Deceleration time
Acceleration and deceleration
Description
No automatic switching of the accel-
eration/deceleration time
Second acceleration/deceleration
time from a start
Acceleration/deceleration time auto-
matic switching
No automatic switching, since output
frequency will not reach the switch-
ing frequency
t
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