Hitachi L700 SERIES Instruction Manual page 92

Chapter 4 Explanation of Functions
4.2.24 Two-stage acceleration/deceleration function (2CH)
The two-stage acceleration/deceleration function allows you to
change the acceleration or deceleration time while the inverter is
accelerating or decelerating the motor.
Select one of the following three methods of changing the
acceleration or deceleration time:
1) Changing the time by the signal input to an intelligent input
terminal
2) Automatically changing the time when the output frequency
reaches a specified frequency
3) Automatically changing the time only when switching the
motor operation from forward rotation to reverse rotation, or
vice versa
Selecting the 3rd control system enables the change of the
acceleration or deceleration time only by terminal input. Not bytwo-stage acceleration/deceleration
frequency.
To change the acceleration/deceleration time by the signal input to an intelligent input terminal, assign
function "09" (2CH) to one of the terminal functions C001 to C008.
Item
Acceleration (2) time
setting
Deceleration (2) time
setting
Select method to switch
to Acc2/Dec2 profile
Acc1 to Acc2 frequency
transition point
Dec1 to Dec2 frequency
transition point
(Example 1) When "00" is specified for "A094" or "A294"
Output
frequency
Acceleration
time 1
(Example 3) When "02" is specified for "A094" or "A294"
Output
frequency
Acceleration
time 1
Function code Data
A092/A292/ 0.01 to
A392 3600. (s)
A093/A293/ 0.01 to
A393 3600. (s)
00
A094/A294 01
02
0.00 to
A095/A295
400.0 (Hz)
0.00 to
A096/A296
400.0 (Hz)
Acceleration Deceleration
time 2 time 2
Deceleration
time 1
Deceleration Deceleration
time 2 time 1
Acceleration
time 2
F002/F202/F302: Acceleration (1) time setting,
F003/F203/F303: Deceleration (1) time setting,
A092/A292/A392: Acceleration (2) time setting,
A093/A293/A393: Deceleration (2) time setting,
A094/A294: Select method to switch to
A095/A295: Acc1 to Acc2 frequency transition
A096/A296: Dec1 to Dec2 frequency transition
C001 to C008: Terminal [1] to [8] functions
(See examples 1 and 2.)
(See examples 1 and 2.)
Changing the time by the signal input to the 2CH terminal
(See example 1.)
Changing the time at the two-stage acceleration/deceleration frequency
(See example 2.)
Valid only while the inverter is switching the motor between forward and
reverse operations (See example 3.)
Valid when "01" is specified for the select method to switch to Acc2/Dec2
profile (A094/A294) (See example 2.)
Valid when "01" is specified for the Select method to switch to Acc2/Dec2
profile (A094/A294) (See example 2.)
(Example 2) When "01" is specified for "A094" or "A294"
Output
frequency
Acceleration
Acceleration
time 1
4 - 30
Related code
1st/2nd/3rd motors
1st/2nd/3rd motors
1st/2nd/3rd motors
1st/2nd/3rd motors
Acc2/Dec2 profile, 1st/2nd motor
point, 1st/2nd motors
point, 1st/2nd motors
Description
Deceleration
time 2 time 2
Deceleration
time 1