Mitsubishi Electric F700, Instruction Manual

Page: 103 / 341

94
Setting of acceleration/deceleration time
and acceleration/deceleration pattern
(5) Variable-torque acceleration/deceleration ( Pr.29 = "6")
˜
This function is useful for variable-torque load such as a fan and blower to
accelerate/decelerate in short time.
In areas where output frequency > base frequency, the speed accelerates/
decelerates linearly.
CAUTION
Setting the backlash measures increases the acceleration/deceleration time by the stopping time.
i
Parameters referred to
i
Pr. 3 Base frequency Refer to page 78
Pr. 7 Acceleration time, Pr. 8 Deceleration time, Pr. 20 Acceleration/deceleration reference frequency Refer to page 90
Pr. 14 Load pattern selection Refer to page 80
Pr. 592 Traverse function selection Refer to page 246
Setting value "6"
[Variable-torque
acceleration/deceleration]
Pr.3
Base frequency
Setting
frequency
Pr.7 Acceleration time
Time
Pr.8 Deceleration time
CAUTION
˜
As the acceleration/deceleration time of variable-torque acceleration/deceleration,
set the time taken to reach
Pr. 3 Base frequency , not Pr. 20 Acceleration/deceleration
reference frequency .
REMARKS
˜
When the base frequency is not 45 to 65Hz, the speed accelerates/decelerates
linearly even though
Pr. 29 = "6".
˜
Variable-torque acceleration/deceleration is disabled when traverse function is
enabled (
Pr.592 = "2" or Pr.592 = "1" at External operation mode).
˜
Variable-torque acceleration/deceleration overrides Pr. 14 = "1" setting (for variable-
torque load). Thus, when Pr. 14 = "1" while variable-torque acceleration/deceleration is
valid, inverter operates as
Pr. 14
= "0" (for constant-torque load).