Programming the control
signal terminals
01/02 AWB8230-1415GB
94
Torque limitation (TL), torque selection (TRQ1 and TRQ2)
With the digital inputs configured as TL, TRQ1 and TRQ2, you can
control the torque limitation. This function is based on the motor
current limitation and is available only in vector control mode
(PNU A044) (a Section “Voltage/frequency characteristic and
voltage boost“, Page 126):
• SLV
• 0 Hz SLV
• Vector control with optional DE6-IOM-ENC module.
Under PNU b040, specify how the torque limits are defined.
TL – activate torque limitation
If you activate the digital input configured as TL, the torque limits
under PNU b040 apply. Otherwise, the frequency inverter uses
200 % as its upper limit.
If no digital input is configured as TL, the 200 % upper limit also
applies for torques.
TRQ1 and TRQ2 – bitwise selection of torque limits
With the digital inputs configured as TRQ1 and TRQ2, you can
define the currently applicable torque limit PNU b041 to b044. To
do this, enter the value 01 in PNU b040. The torque limit selected
with TRQ1 and TRQ2 limit applies to all four quadrants.
Programming the digital inputs
X To activate vector control, enter one of the following values in
PNU A044 (a Section “Voltage/frequency characteristic and
voltage boost“, Page 126).
– 03: SLV control
– 04: 0 Hz SLV control
– 05: Vector control with optional DE6-IOM-ENC module
X If you want to use TRQ1 and TRQ2, enter the value 01 under
PNU b040.
X Program one of the digital inputs 1 to 8 as TL by setting the
corresponding PNU (C001 to C008) to 40.
X Program one of the digital inputs 1 to 8 as TRQ1 by setting the
corresponding PNU (C001 to C008) to 41.
X Program one of the digital inputs 1 to 8 as TRQ2 by setting the
corresponding PNU (C001 to C008) to 42.
TRQ1 TRQ2 Torque limit
On Off b041 (clockwise, drive mode)
On Off
b042 (anticlockwise, regenerative
mode)
On On
b043 (anticlockwise, drive mode)
Off On
b044 (clockwise, regenerative
mode)
Figure 86: The four quadrants of a motor
n:Speed
M:Torque
PNU b042
M
n
PNU b043
PNU b041
PNU b044
M
M
Figure 87: Digital input 1 configured as REV (start/stop anticlockwise
operation), 2 as TL (activate torque limitation), 3 and 4 as
TRQ1 and TRQ2 (bitwise selection of torque limits).
Figure 88: Function chart for torque limits
TRQ1
TRQ2
TL
REV
FWD
P24FW1234
TRQ
t
PNU b041/
PNU b042/
PNU b043/
PNU b044
M
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