Mitsubishi Electric FR-E700 Instruction Manual page 227

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 3600 s (minimum setting increments 0.1 s)
Setting "1"
CAUTION:
E
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 set-
ting of Pr. 147. Switching the parameter sets allows you to operate motors with different specifica-
tions 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.
Acceleration/deceleration time changes when the RT signal turns ON or the output frequency reach-
es the Pr. 147 setting or higher.
0.00 Hz Pr. 147 Set frequency
Set frequency < Pr. 147
Tab. 6-5:
When the RT signal turns on, the acceleration/deceleration time switches to the second acceler-
ation/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 SC EC/ENE
.......................... 0 to 360 s (minimum setting increments 0.01 s)
Pr. 147
9999 (Initial value)
0.00 Hz
Acceleration/deceleration times in dependence on Parameter 147
Output frequency [Hz]
Set frequency
Slope set
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
Slope set Slope set by
by Pr. 7 by Pr. 44 Pr. 44 (Pr. 45)
Deceleration time
Acceleration and deceleration
Description
No automatic switching of the accelera-
tion/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 switching
frequency
t
Slope set by
Pr. 8
I001929E
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