Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 228 / 608

Acceleration and deceleration Parameter
6 - 74
S-shaped acceleration/deceleration pattern
If a S-shaped acceleration/deceleration pattern A is selected in Pr. 29, the set time is the period re-
quired to reach the base frequency set in Pr. 3 "Base frequency".
Acceleration/deceleration time formula when the set frequency is the base frequency or higher.
T: Acceleration/deceleration time setting value (s)
f: Set frequency (Hz)
Guideline for acceleration/deceleration time when Pr. 3 "Base frequency" = 50 Hz (0 Hz to set frequency).
NOTE You will find a detailed description of this parameter in section 6.7.3.
Acceleration/Deceleration time [s]
Frequency Setting [Hz]
50 120 200 400
5 5 16 38 145
15 15 47 115 435
Tab. 6-6: Acceleration/deceleration time at a base frequency of 50 Hz
NOTES
Changing terminal assignment may affect the other functions. Make setting after confirming the
function of each terminal. (Refer to section 6.10.3.)
If the Pr. 20 setting is changed, the Pr. 125 and Pr. 126 (frequency setting signal gain frequency)
settings do not change. Set Pr. 125 and Pr. 126 to adjust the gains.
When the Pr. 7, Pr. 8, Pr. 44 and Pr. 45 settings are 0.03 s or less, the acceleration/deceleration time
is 0.04 s. At that time, set Pr. 20 to "120 Hz" or less.
If the acceleration/deceleration time is set, the actual motor acceleration/deceleration time can-
not be made shorter than the shortest acceleration/deceleration time determined by the mechan-
ical system J (inertia moment) and motor torque.
t
4
9
---
T
Pr. 3
2
-------------------- f
2
5
9
--- + T =