Hitachi SJ700-2 Series - Accel

Chapter 5 Instruction Words
5 - 31
Variable name Range of values Default Unit Data size Attribute
ACCEL
Acceleration time
setting
0 to 360000 0
0.01
second
Unsigned
2-word data
Readable
and writable
- 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= 6000 : Set the output frequency to 60 Hz.
ACCEL= 1000 : Set the acceleration time to 10 seconds.
FW= 1 : Start forward rotation of the motor.
LOOP if FW < U(00) then LBL1 : When the output frequency is less than 5 Hz,
set the acceleration time to 10 seconds.
if FM < U(01) then LBL2 : When the output frequency is less than 10 Hz,
change the acceleration time to 5 seconds.
if FM < U(02) then LBL3 : When the output frequency is less than 30 Hz,
change the acceleration time to 1 second.
if FM < U(03) then LBL4 : When the output frequency is less than 50 Hz,
change the acceleration time to 5 seconds.
if FM < U(04) then LBL5 : When the output frequency is less than 55 Hz,
change the acceleration time to 10 seconds.
if FM < U(05) then LBL6 : When the output frequency is less than 60 Hz,
change the acceleration time to 20 seconds.
if FM >= U(05) then LBL8 : When the output frequency reaches or
exceeds 60 Hz, end acceleration.
goto LBL7
LBL1 ACCEL= 1000
goto LBL7
LBL2 ACCEL= 500
goto LBL7
LBL3 ACCEL= 100
goto LBL7
LBL4 ACCEL= 500
goto LBL7
LBL5 ACCEL= 1000
goto LBL7
LBL6 ACCEL= 2000
LBL7 goto LOOP
LBL8 Y(00)= 1 : Turn Y (00) on when acceleration ends.
：
(Data area [Data Window]) (Parameters)
U(00) = 500 : Set the frequency of 5 Hz in variable "U (00)". A001 = 07
U(01) = 1000 : Set the frequency of 10 Hz in variable "U (01)". P031 = 03
U(02) = 3000 : Set the frequency of 30 Hz in variable "U (02)".
U(03) = 5000 : Set the frequency of 50 Hz in variable "U (03)".
U(04) = 5500 : Set the frequency of 55 Hz in variable "U (04)".
U(05) = 6000 : Set the frequency of 60 Hz in variable "U (05)".