Interrupts; Position Control Loop; Reference Points; Supplementary Conditions - Siemens SINUMERIK 840D sl Function Manual

10.4

Interrupts

Drive alarms are only displayed for axes with drive control
10.5

Position control loop

During setpoint exchange, the drive train and therefore the position control loop are isolated.
In order to avoid instabilities, exchange only takes place at standstill and once all servo enables
have been deleted.
The use of a single drive means that only one of the control loops can be closed at any one
time. Axes without drive control are operated with open position controller and following
positions.
10.6

Reference points

The use of load-side encoders does not affect the axial reference points of a setpoint exchange.
However, the mechanical reference to the load can be lost following setpoint exchange for a
load-side position derived solely from the motor encoder. These types of axis must be
referenced again after every setpoint exchange.
10.7

Supplementary conditions

Parameter sets
A setpoint exchange is not performed if one of the following states is present:
● A parameter set changeover in one of the two machine axes has not completed.
● The parameter sets of the two machine axes are not the same.
Note
No message is displayed.
"Parking" operating status
The "parking" operating state can only be exited using the axis with the drive checking function.
Service display drive
The "Drive Service Display" HMI diagnostics screen does not take into account the changes
in assignments between machine axes and the drive.
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
S9: Setpoint exchange - 840D sl only
10.7 Supplementary conditions
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