Mitsubishi Electric fr-e700 series, Instruction Manual

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Parameter Acceleration and deceleration
FR-E700 SC EC/ENE 6 - 73
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"
.......................... 0 to 360 s (minimum setting increments 0.01 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.
햲
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.
E
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.
Pr. 147 Acceleration/Deceleration Time Description
9999 (Initial value) Pr. 7, Pr. 8
No automatic switching of the accelera-
tion/deceleration time
0.00 Hz Pr. 44, Pr. 45
Second acceleration/deceleration time
from a start
0.00 Hz Pr. 147 Set frequency
Output frequency < Pr. 147:
Pr. 7, Pr. 8
Pr. 147 Output frequency:
Pr. 44, Pr. 45
Acceleration/deceleration time auto-
matic switching
햲
Set frequency < Pr. 147 Pr. 7, Pr. 8
No automatic switching, since output
frequency will not reach the switching
frequency
Tab. 6-5: Acceleration/deceleration times in dependence on Parameter 147
I001929E
Fig. 6-30: Automatic switching of the acceleration/deceleration time
Set frequency
Acceleration time
t
Output frequency [Hz]
Deceleration time
Slope set
by Pr. 7
Slope set
by Pr. 44
Slope set by
Pr. 44 (Pr. 45)
Slope set by
Pr. 8