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Using Intelligent Input Terminals
Operations
and Monitoring
4–38
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.
Code
Symbol Function Name
Input
State
Description
40 TL Torque limit enable ON Enables torque limiting
OFF Disables torque limiting
41 TRQ1 Torque limit select 1 0 / 1 Torque limit select, Bit 1 (LSB)
42 TRQ2 Torque limit select 2 0 / 1 Torque limit select, Bit 2 (MSB)
Valid for inputs:
C001, C002, C003, C004,
C005, C006, C007, C008
Required
settings:
B040, B041, B042, B043,
B044
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.
• When using the torque limit function at low
speed, also use the overload restriction
feature.
Reverse-driving Forward-regenerating
Reverse-regenerating Forward-driving
Torque
FWRV
+
B40=00
B043 B044
B042 B041
5 3 1
7 6 4 2
8
FW
TH
PLC
CM1
P24
CM1
5 3 1
7 6 4 2
8
FW
TH
PLC
CM1
P24
CM1
See I/O specs on page 4–9.
Examples: (Require input configuration—
see page 3–47
. Jumper position shown is
for –xFU/-xFR models; for –xFE models,
see page 4–12
.)
TL
TRQ1TRQ2
TL
Intelligent
Inputs
Torque limit
parameter
TRQ2 TRQ1
OFF OFF B041
OFF ON B042
ON OFF B043
ON ON B044