Lenze 8400 - Torque Control with Speed Limitation

Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 237
5 Motor control (MCTRL)
5.9 Servo control (SC)
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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
.