Lenze 8400 - Speed;Position Output Via Axis Bus for a Slave Drive

4 Detailed functions of the technology application
4.3 Speed/position output via axis bus for a slave drive
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Lenze · 8400 "Position Sequencer" technology application · Software manual · DMS 1.0 EN · 07/2014 · TD05
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4.3 Speed/position output via axis bus for a slave drive
In order to be able to directly connect a slave drive to the positioning drive, the LS_AxisBusOut SB is
provided in the application.
• In the default setting, the speed setpoint integrated to an angle (path) is output via line data
words 1 & 2, and the speed setpoint is output via line data word 3.
• A slave drive connected via axis bus with the "Electrical Shaft Slave" technology application is
executable immediately after the initialisation of the axis bus; however, without the bus
monitoring functions of the electrical shaft being available.
• If the drive is to be used as master for a slave drive with the "Position Follower" technology
application, set the value "1" in C00470/4. Then, instead of the speed integrated, the current
position is output via axis bus.
The signal to be output via axis bus is selected using C00470/2 and C00470/4:
Details on the signal flow
The changeover between the setpoint and actual value is effected via the L_SignalSwitch_2 FB.
In the default setting C00470/4 = 0, the position value for SB LS_AxisBusOut is generated with the
L_PhaseIntK_2 FB. Loading or a reset is not required, since in the slave drive merely consistency
with the speed value is compared without attaching importance to the absolute value.
With the setting C00470/4 = 1 (operation as position follower master), as position value for
SB LS_AxisBusOut the current position dnMotorPosAct_p is used by the LS_MotorInterface SB.
 Stop!
If operation as master position follower is switched on (C00470/4 = "1"), homing of the
master causes a step for the slave position follower if the current position is set to the
home position!
Remedy:
Inhibit the slave position follower when you are referencing the master!
C00470/4 C00470/2 Axis bus output
Operation as
position follower master
Setpoint/actual value
selection
0Off 0Setpoint Line data words 1 & 2 = speed setpoint integrated to an angle
(path)
Line data word 3 = speed setpoint
1 Actual value Line data words 1 & 2 = current speed integrated to an angle
(path)
Line data word 3 = current speed
1 On Line data words 1 & 2 = current position
Line data word 3 = current speed