Lenze 8400 motec - Manual (Page 233)

Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05 233
7 Technology applications
7.3 TA "Actuating drive speed (AC Drive Profile)"
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Scaling of the torque values
On the bus side, the torque setpoint is defined in [0.01 Nm]. In the controller, however, all torque-
related signals are processed in percentage with regard to a reference variable ( C00057 ). For the
scaling required in this case, the LS_Convert_2 system block is used (see also Internal signal flow ).
• The type of conversion can be adapted in C01354/2 .
• A conversion of [0.01 Nm] to [%] is preset for the "AC Drive Profile" application according to the
following formula.
• Optionally, an additional scaling can be executed via a scaling factor adjustable in C01353/2 .
For the output of the actual torque value to the bus, the following conversion is made:

Note!
The scaling parameterisable via C01353/2 is carried out as "Shift Operation". Overflows
are not absorbed!
Equation for scaling the torque setpoint
Parameter Name Description
C00057 Maximum torque Reference variable for torque-related signals
C01353/2 ACDrive: Torque scaling Scaling factor (-128 ... 127)
• In the Lenze setting "0", no scaling takes place (2 0 = 1)
Equation for scaling the actual torque
Parameter Name Description
C00057 Maximum torque Reference variable for torque-related signals
C01353/2 ACDrive: Torque scaling Scaling factor (-128 ... 127)
• In the Lenze setting "0", no scaling takes place (2 0 = 1)
Torque setpoint
Application
Torque setpoint
Bus
[Nm]
16384 100 ⋅
Maximum torque [0.01 Nm]
-------------------------------------------------------------------------
1
2 Scaling factor
-------------------------------- ⋅ ⋅ =
Actual torque
Bus
[Nm] Actual torque
Application
Maximum torque [0.01 Nm]
16384 100 ⋅
------------------------------------------------------------------------- 2 Scaling factor ⋅ ⋅ =