Siemens SINUMERIK 840D sl Function Manual page 469

The assignment between the link axes and a channel is implemented as follows:
● For permanent assignment using machine data:
Allow the direct logic machine axis image to show link axes.
● For dynamic assignment:
Allow the axis container slot machine data to show link axes.
Further information on link axes and container axes can be found in:
References:
Function Manual, Extended Functions; Several Operator Panel Fronts and Multiple NCUs,
Distributed Systems (B3)
Interface signals
The signals of the 1st channel are located in the NC/PLC interface in DB21, the signals from
channel 2 are located in DB22. The channel or channels can be monitored and controlled from
the PLC or NCK.
Channel-specific technology specification
The technology used can be specified for each channel:
MD27800 $MC_TECHNOLOGY_MODE
In the delivery state, machine data is active for milling as standard.
Spindle functions using a PLC
In addition to function block FC18, spindle functions can also be started and stopped via the
axial NC/PLC interface signals in parallel to part programs that are running.
Requirements:
● Channel status: "Interrupted" or "RESET"
● Program status: "Interrupted" or "canceled"
The following functions can be controlled from the PLC via interface signals:
● Stop (corresponds to M5)
● Start with clockwise direction of rotation (corresponds to M3)
● Start with counter-clockwise direction of rotation (corresponds to M4)
● Select gear stage
● Positioning (corresponds to M19)
For several channels, the spindle started by the PLC is active in the channel to which it is
assigned at the start.
For more information on the special spindle interface, see Section "S1: Spindles (Page 1199)."
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
K1: Mode group, channel, program operation, reset response
9.4 Channel
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