Programming Using Nc/Plc Interface Signals; Function - Siemens SINUMERIK 840D Function Manual

S1: Spindles
18.7 Programming
18.7.4

Programming using NC/PLC interface signals

18.7.4.1

Function

Note
The function is only available when using SINUMERIK Operate!
The following jobs/tasks can be issued to a spindle from the PLC user program using the job
interface DB31, ... DBX30.0 - 4:
● Spindle stop
● Spindle start, clockwise rotation
● Spindle start, counter-clockwise rotation
● Select gear stage
● Spindle-start positioning
Job ID
At the NC side, a spindle job is identified as a result of a positive edge change of the appropriate
interface signal (0 → 1).
Requirements
At the instant of the spindle job, the following preconditions must be satisfied regarding the
channel, program and spindle states.
● Channel state:
– DB21, ... DBX35.6 == 1 (channel state "interrupted") OR
– DB21, ... DBX35.7 == 1 (channel state "reset")
● Program state:
– DB21, ... DBX35.3 = 1 (program state "interrupted") OR
– DB21, ... DBX35.4 = 1 (program state "interrupted")
● Spindle state
– ("Channel axis" OR "Neutral axis") AND NO
– (positioning motion using FC18 OR synchronized action)
Note
Response in the event of an error
In the event of an error, i.e. if a job signal is set during an invalid state, then the corresponding
job is ignored without any feedback signal.
820
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA