Accel - Hitachi SJ700-2 Series Instruction Manual

Variable name

ACCEL

Acceleration time
setting
- Explanation
This variable can be used to read and write the motor acceleration time in the inverter. The acceleration
time setting using this variable is enabled only when the setting of accel/decel time input selection
(P031) is "03" (PRG). (The setting of this variable does not correspond to the setting of inverter
parameter "F002".) The data written to this variable is not stored in the inverter's EEPROM. This
variable will restore the initial setting when the inverter power is turned off.
Note 1: When "0" is set in this variable, the acceleration time follows the setting of inverter parameter
"F002", "F202", or "F302".
Note 2: When a program writes a value to this variable, the value is reflected in the inverter in a 40-ms
cycle, which conforms to the standard inverter specifications.
- Sample program: Program to change the acceleration time according to output frequency
(Code area [Code Window])
：
SET-Freq=
ACCEL=
FW=
LOOP if
if
if
if
if
if
if
goto
LBL1 ACCEL=
goto
LBL2 ACCEL=
goto
LBL3 ACCEL=
goto
LBL4 ACCEL=
goto
LBL5 ACCEL=
goto
LBL6 ACCEL=
LBL7 goto
LBL8 Y(00)=
：
(Data area [Data Window])
U(00) = 500
U(01) = 1000
U(02) = 3000
U(03) = 5000
U(04) = 5500
U(05) = 6000
Range of values
0 to 360000
6000
1000
1
FW < U(00)
FM < U(01)
FM < U(02)
FM < U(03)
FM < U(04)
FM < U(05)
FM >= U(05)
LBL7
1000
LBL7
500
LBL7
100
LBL7
500
LBL7
1000
LBL7
2000
LOOP
1
: Set the frequency of 5 Hz in variable "U (00)".
: Set the frequency of 10 Hz in variable "U (01)".
: Set the frequency of 30 Hz in variable "U (02)".
: Set the frequency of 50 Hz in variable "U (03)".
: Set the frequency of 55 Hz in variable "U (04)".
: Set the frequency of 60 Hz in variable "U (05)".
Default
0
: Set the output frequency to 60 Hz.
: Set the acceleration time to 10 seconds.
: Start forward rotation of the motor.
then LBL1 : When the output frequency is less than 5 Hz,
set the acceleration time to 10 seconds.
then LBL2 : When the output frequency is less than 10 Hz,
change the acceleration time to 5 seconds.
then LBL3 : When the output frequency is less than 30 Hz,
change the acceleration time to 1 second.
then LBL4 : When the output frequency is less than 50 Hz,
change the acceleration time to 5 seconds.
then LBL5 : When the output frequency is less than 55 Hz,
change the acceleration time to 10 seconds.
then LBL6 : When the output frequency is less than 60 Hz,
change the acceleration time to 20 seconds.
then LBL8 : When the output frequency reaches or
exceeds 60 Hz, end acceleration.
: Turn Y (00) on when acceleration ends.
5 - 31
Chapter 5 Instruction Words
Unit Data size
0.01 Unsigned
second 2-word data
(Parameters)
A001 = 07
P031 = 03
Attribute
Readable
and writable