Special Spindle Motion Via The Plc Interface - Siemens SINUMERIK 840D sl Function Manual

16.7.4

Special spindle motion via the PLC interface

Note
The function is only available when using SINUMERIK Operate!
Why use a special spindle interface?
This function can be used to program the spindle via an axial PLC interface as an alternative
to the FC18. The simplicity of the settings results in slightly restricted functionality. This
functionality can be used preferably for simple control applications.
Functionality
Spindles can be started and stopped outside a part program that is being executed via the
internal DBB30 spindle interface:
● DB31, ... DBX30.0 (spindle stop)
● DB31, ... DBX30.1 (spindle start, clockwise)
● DB31, ... DBX30.2 (spindle start, counter-clockwise)
● DB31, ... DBX30.3 (select gear stage)
Supplementary signal to the signal "spindle start, clockwise/counter-clockwise"; determines
the gear stage that matches the speed analog to M40 in the part program.
● DB31, ... DBX30.4 (spindle positioning start)
In order to start a spindle job, the channel handling the spindle must be in the acceptance
state. A spindle job is always started on the Low-High edge of an internal DBB30 signal.
Generally, the internal DBB30 start signals do not have any meaning in the static state and do
not prevent the spindle being programmed by FC18, synchronized actions, the part program
or JOG traversing (e.g. when the STOP signal is statically at "1").
Requirements
In order that spindle jobs are accepted via the DBB30 spindle interface, the following conditions
must be fulfilled (acceptance state):
● The channel state must be in the "interrupted" or "reset" mode:
– DB21, ... DBX35.6 = 1 (channel state "interrupted")
– DB21, ... DBX35.7 = 1 (channel state "reset")
● The program state must be in the "interrupted" or "canceled" mode:
– DB21, ... DBX35.3 = 1 (program state "interrupted")
– DB21, ... DBX35.4 = 1 (program state "interrupted")
These states will occur on RESET and in JOG mode.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
S1: Spindles
16.7 Programming
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