Decel - Hitachi SJ700-2 Series Instruction Manual

Chapter 5 Instruction Words
Variable name

DECEL

Deceleration time
setting
- Explanation
This variable can be used to read and write the motor deceleration time in the inverter. The deceleration
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 "F003".) 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 deceleration (1) time setting
"F003", "F203", or "F304".
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 deceleration time according to output frequency
(Code area [Code Window])
：
DECEL=
FW=
wait
Hz.
DECEL=
wait
Hz.
DECEL=
wait
Hz.
DECEL=
wait
Hz.
DECEL=
wait
DECEL=
wait
Y(01)=
：
(Data area [Data Window])
U(00) 500
U(01) 1000
U(02) 3000
U(03) 5000
U(04) 5500
U(05) 6000
(Parameter)
P031 = 03
Range of values
0 to 360000
3000
0
FM < U(04)
1000
FM < U(03)
500
FM < U(02)
1000
FM < U(01)
3000
FM < U(00)
6000
RUN = 0
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 Unit
0.01
0
second
: Set the deceleration time to 30 seconds.
: Start deceleration of the motor.
: Wait until the output frequency falls below 55
: Change the deceleration time to 10 seconds.
: Wait until the output frequency falls below 50
: Change the deceleration time to 5 seconds.
: Wait until the output frequency falls below 30
: Change the deceleration time to 10 seconds.
: Wait until the output frequency falls below 10
: Change the deceleration time to 30 seconds.
: Wait until the output frequency falls below 5 Hz.
: Change the deceleration time to 60 seconds.
: Wait until the motor stops.
: Turn Y (00) on when acceleration ends.
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Data size Attribute
Unsigned Readable
2-word data and writable