Hitachi SJ300-037HFE 사용자 설명서
SJ300 Inverter
Oper
ati
ons
ons
and Monitor
ing
4–37
Torque Limit
The Torque Limit function limits the motor output torque for sensorless vector control, sensor-
less vector control 0Hz domain, or vector control with feedback.
less vector control 0Hz domain, or vector control with feedback.
In the torque limit function, the following operational modes are available (selected by B040):
1. Four-quadrant individual setting mode – This mode sets torque limit in 4 zones, forward
driving and regenerating, reverse driving and regenerating. Limits for each quadrant are set
with B041 – B044 individually.
with B041 – B044 individually.
2. Terminal selection mode – By use of torque limit select intelligent input terminals 1 and 2,
this mode changes and uses torque limits 1 – 4 set in B041 – B044. Selected torque limit
range is valid in all four quadrants.
range is valid in all four quadrants.
3. Analog input mode – This mode sets torque limit value by the voltage applied to terminal
[O2] (referenced to [L] for ground. An input of 0 – 10V corresponds to the torque limit
value of 0 to 200%. The selected torque limit value is valid in all four quadrants (whether
forward or reverse move, driving or regenerating).
value of 0 to 200%. The selected torque limit value is valid in all four quadrants (whether
forward or reverse move, driving or regenerating).
4. Expansion Cards 1 and 2 – This function is valid when using the expansion card (SJ-DG).
Please refer to the SJ-DG instruction manual.
When the torque limit enable function [TL] is assigned to an intelligent input terminal, torque
limiting occurs only when [TL] is ON. When the [TL] input is OFF, the inverter always uses the
default torque control limit of 200% maximum. That torque limit value corresponds to 200% of
the maximum inverter output current. Therefore, the output torque also depends on the particu-
lar motor in use. When the over-torque output [OTQ] is assigned in the intelligent output selec-
tion, it turns ON when the inverter is performing torque limiting.
limiting occurs only when [TL] is ON. When the [TL] input is OFF, the inverter always uses the
default torque control limit of 200% maximum. That torque limit value corresponds to 200% of
the maximum inverter output current. Therefore, the output torque also depends on the particu-
lar motor in use. When the over-torque output [OTQ] is assigned in the intelligent output selec-
tion, it turns ON when the inverter is performing torque limiting.
Note 1: Unavailable for A344
Note 2: Unavailable for A244 and A344
Note 2: Unavailable for A244 and A344
Code
Function
Data or Range
Description
A044 /
A244
Control method
selection
00
01
02
03
04
05
01
02
03
04
05
V/f Constant torque
V/f Variable torque
V/f Free-setting torque *1
Sensorless vector *1
Sensorless vector, 0 Hz domain *1
Vector control with sensor *2
V/f Variable torque
V/f Free-setting torque *1
Sensorless vector *1
Sensorless vector, 0 Hz domain *1
Vector control with sensor *2
B040
Torque limit
selection
00
01
02
03
04
01
02
03
04
4-quadrant individual setting
Terminal selection
Analog [O2] input
Expansion card 1
Expansion card 2
Terminal selection
Analog [O2] input
Expansion card 1
Expansion card 2
B041
Torque limit 1
0 to 200%
Forward-driving in 4-quadrant mode
B042
Torque limit 2
0 to 200%
Reverse-regenerating in 4-quadrant
mode
mode
B043
Torque limit 3
0 to 200%
Reverse-driving in 4-quadrant mode
B044
Torque limit 4
0 to 200%
Forward-regenerating in 4-quadrant
mode
mode
C001
to
C008
Intelligent input
terminal [1] to [8]
function
terminal [1] to [8]
function
40
41
42
41
42
Torque limit enable
Torque limit selection, bit 1 (LSB)
Torque limit selection, bit 2 (MSB)
Torque limit selection, bit 1 (LSB)
Torque limit selection, bit 2 (MSB)
C021
to
C025
Intelligent output
terminal [11] to [15]
function
terminal [11] to [15]
function
10
In torque limit