Lenze 8400 - Page 376

7 Technology applications
7.2 TA "Actuating drive speed"
376
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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Selection of the main speed setpoint
The main speed setpoint is selected in the Lenze setting via the analog input 1.
• Offset and gain of this input signal can be set in C00696
and C00670 for a simple signal
adjustment of a setpoint encoder.
• Scaling: 16384 ≡ 100 % reference speed (C00011
)
• The main setpoint is transformed to a speed setpoint in the setpoint encoder via a ramp
function generator with linear or S-shaped ramps.
• Upstream to the ramp function generator, a blocking speed masking function and a setpoint
MinMax limitation are effective.
• For a detailed functional description see the L_NSet
FB.
Motor potentiometer function
Alternatively, the main speed setpoint can be generated via a motor potentiometer function.
• In the Lenze setting, the motor potentiometer function is deactivated.
• Activation is possible via C00806
or via the bMPotEnable input.
• The behaviour of the motor potentiometer during switch-on of the drive system can be selected
in C00805
.
• For a detailed functional description see the L_MPot
FB.
Optional selection of an additional speed setpoint
You can optionally select an additional speed setpoint (e.g. as a correcting signal).
• The additional speed setpoint can be linked arithmetically with the main speed setpoint behind
the ramp function generator.
• You must set the setpoint arithmetic to "1: NOut = NSet + NAdd" in C00190
in order to activate
the additional speed setpoint.
• Offset and gain of this input signal can be set in C00697
and C00671 for a simple signal
adjustment of a setpoint encoder.
• Scaling: 16384 ≡ 100 % reference speed (C00011
)
• The acceleration and deceleration time for the additional speed setpoint can be set in C00220
and C00221
.
• For a detailed functional description see the L_NSet
FB.
 Tip!
In the case of a grinding machine, the additional speed setpoint can, for instance, be used
to control a constant circumferential speed while the grinding disk diameter is reduced.