Hitachi SJ700-004LFU2, Инструкция по эксплуатации

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SJ700
2
Inverter
Oper
ati
ons
and Monitor
ing
4–31
When the torque limit enable function [TL] is assigned to an intelligent input terminal, torque
limiting occurs only when [TL] is ON. Both the 4-quadrant mode and terminal switching mode
of torque limiting use input [TL] for enable/disable. When the [TL] input is OFF, the inverter
always uses the default torque control limit of 200% maximum. That torque limit value corre-
sponds to 200% of the maximum inverter output current. Therefore, the output torque also
depends on the particular motor in use. When the over-torque output [OTQ] is assigned in the
intelligent output selection, it turns ON when the inverter is performing torque limiting. When
using the torque limit function at low speed, also use the overload restriction feature.
Note 1: Unavailable for A344
Note 2: Unavailable for A244 and A344
The 4-quadrant operation mode for torque
limiting (B040=00) is illustrated in the figure
to the right. The instantaneous torque depends
on inverter activity (acceleration, constant
speed, or deceleration), as well as the load.
These factors determine the operating quadrant
at any particular time. The parameters in B041,
B042, B043 and B044 determine the amount of
torque limiting that the inverter applies.
The terminal selection mode (B040=01) uses
two intelligent inputs [TRQ1] and [TRQ2] for
the binary-encoded selection of one of the four
torque limit parameters B041, B042, B043 and
B044.
Code Function Data or Range Description
A044 /
A244
Control method
selection
00
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
B040
Torque limit
selection
00
01
02
03
04 4-quadrant individual setting
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
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
C001
to
C008
Intelligent input
terminal [1] to [8]
function 40
41
42 Torque limit enable
Torque limit selection, bit 1 (LSB)
Torque limit selection, bit 2 (MSB)
C021
to
C025
Intelligent output
terminal [11] to [15]
function 10 In torque limit
Reverse-driving Forward-regenerating
Reverse-regenerating Forward-driving
Torque
FW RV
+
B40=00
B043 B044
B042 B041