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Lenze 8400 - Torque Control with Speed Limitation

Lenze 8400
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Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 237
5 Motor control (MCTRL)
5.9 Servo control (SC)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5.9.2.2 Torque control with speed limitation
When bTorquemodeOn = TRUE, a torque-controlled operation is activated. The setpoint torque
directly follows the default value nTorqueSetValue_a.
Due to its speed limitation, the torque-controlled drive can only rotate within a speed range whose
positive speed is limited by nSpeedHighLimit_a and whose negative speed is limited by
nSpeedLowLimit_a.
From version 13.00.00, the bLimSpeedTorquemodeOn status signal is used to show that the
speed limitation is active.
The speed is defined by the process.
The torque setpoint is calculated directly from nTorqueSetValue_a.
From version 12.00.00, the torque limitation is active via nTorqueMotLimit_a and
nTorqueGenLimit_a in this control mode, too, for the torque setpoint to be limited. The
torque limitation can be deactivated in C2865/1
to obtain the previous function.
Note!
Absolute speed limitation to speed 0 rpm (nSpeedLowLimit_a or
nSpeedHighLimit_a = 0) is only possible from version 12.00.00.
Quick stop (QSP) is used to switch over to Speed control with torque limitation
.
From version 13.00.00, the torque setpoint nSpeedSetValue_a is set to 0 by quick
stop (QSP) device-internally and the two torque limit values nTorqueMotLimit_a
and nTorqueGenLimit_a are set to 100 % to stop the drive quickly and safely
anytime. The previous behaviour can be set in C2865/1
via bit 12 and bit 13.
Designator
DIS code | data type
Information/possible settings
nTorqueSetValue_a
C00830/27 | INT
Torque setpoint / additive torque
Scaling: 16384 100 % M
max
(C00057)
nSpeedHighLimit_a
C00830/88 | INT
Upper speed limit for the speed limitation
During torque-controlled operation only (bTorquemodeOn = TRUE)
Scaling: 16384 100 % rated speed (C00011
)
nSpeedLowLimit_a
C00830/23 | INT
Lower speed limit for speed limitation
During torque-controlled operation only (bTorquemodeOn = TRUE)
Scaling: 16384 100 % rated speed (C00011
)
nTorqueMotLimit_a
C00830/29 | INT
Torque limitation in motor mode
Scaling: 16384 100 % M
max
(C00057)
Setting range: 0 +199.99 %
If keypad control is performed: Parameterisable via C00728/1
.
nTorqueGenLimit_a
C00830/28 | INT
Torque limitation in generator mode
Scaling: 16384 100 % M
max
(C00057)
Setting range: -199.99 ... 0 %
If keypad control is performed: Parameterisable via C00728/2
.

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