Lenze 8400 HighLine - Manual (Page 540)

8 Basic drive functions (MCK)
8.4 Basic settings
540
Lenze · 8400 HighLine · Referenzhandbuch · DMS 10.0 EN · 06/2014 · TD05/TD14
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Parameterising the "setpoint holdback" function
For compensating the runtimes described before, a setpoint holdback can be parameterised in
C01239 . The function directly affects the setpoint forwarding from the Motion Control Kernel to the
motor control.
• Internally, the setpoints are transmitted with a delay by the time set in C01239 from the
LS_MotionControlKernel system block to the motor control.
• Setting rule: C01239 = bus cycle time + 1 ms
• The Lenze setting "0 ms" corresponds to the previous behaviour (no setpoint holdback).
[8-20] Principle of the setpoint holdback (here only in the master for "setpoint line" topology)
 Setpoints
 Transfer of the setpoints to the motor control
 Transfer of the setpoints to the slave drives via fieldbus
 Setpoint holdback: Parameterisable runtime for the transfer of the setpoints to the motor control
 Runtime on the bus due to the bus cycle time and telegram runtimes
 Runtime in the slave controller due to the internal cycle time (1 ms) of the controller
LS_MotionControlKernel ? LS_MotorInterface ?
Motor
interface
0
MCK
C01239 1
LP_CanOut
2
LS_MotionControlKernel ? LS_MotorInterface ?
Motor
interface
MCK
LP_CanIn
Master
Slave
Field bus
Ž

Œ

Note!
In which drives the function is to be parameterised, depends on the bus topology:
• Setpoint line (1 master, many slaves):
Only in the master, the setpoint holdback ( C01239 ) has to be set.
• Setpoint cascade (setpoints from one to drive to the other):
In all drives, the setpoint holdback ( C01239 ) has to be set.
As the setpoint holdback is implemented in the Motion Control Kernel, the
LS_MotionControlKernel system block is required for this function independent of the
setpoint source.