Hitachi SJ300 Series Instruction Manual page 176

4–38
Using Intelligent Input Terminals
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.
Opt.
Symbol Function Name
Code
40 TL Torque limit enable
41 TRQ1 Torque limit select 1
42 TRQ2 Torque limit select 2
C001, C002, C003, C004,
Valid for inputs:
C005, C006, C007, C008
B040, B041, B042, B043,
Required
B044
settings:
Notes:
• Both the 4-quadrant mode and terminal
switching mode of torque limiting use input
[TL] for enable/disable.
• Inputs TRQ1 and TRQ2 apply only to
terminal switching mode.
Intelligent
Torque limit
Inputs
parameter
TRQ2 TRQ1
OFF OFF B041
OFF ON B042
ON OFF B043
ON ON B044
• When using the torque limit function at low
speed, also use the overload restriction
feature.
Torque
Reverse-regenerating
B042
RV
Reverse-driving
B043
Input
Description
State
ON Enables torque limiting
OFF Disables torque limiting
0 / 1 Torque limit select, Bit 1 (LSB)
0 / 1 Torque limit select, Bit 2 (MSB)
Examples: (Require input configuration—
see page 3–47. Jumper position shown is
for –xFU/-xFR models; for –xFE models,
see page 4–12.)
TH FW CM1
8
P24 PLC CM1
7
TRQ2
TH FW CM1
8
P24 PLC CM1
7
See I/O specs on page 4–9.
B40=00
+
Forward-driving
B041
FW
Forward-regenerating
B044
TL
5 3 1
6 4 2
TL
TRQ1
5 3 1
6 4 2