Control Via The Plc Interface - Siemens SINUMERIK 840D Function Manual

H1: Manual traversing

17.2 Control via the PLC interface

Switching from JOG mode to AUTOMATIC/MDI mode
It is only possible to switch operating modes from JOG to AUTOMATIC or MDI if all axes in the
channel have reached "coarse exact stop".
Further information:
Function Manual Basic Functions; Mode group, channel, program operation, reset response
Commissioning
For information on the commissioning of electronic handwheels, see Section "Start-up:
Handwheels (Page 724)".
17.2 Control via the PLC interface
The JOG functions in the NC are activated via the PLC interface from the machine control panel
(MCP). To do this, the input signals of the machine control panel from the PLC must be
transferred to the input interface of the NC in the NC/PLC interface. In this way, the machine
manufacturer can simply adapt the functionality of manual traversing to the machine tool
through the PLC user program. You can use this, for example, to change the assignment
between the direction keys of the machine control panel and the traversing requests to the NC
with regard to the machine and geometry axes.
Basic procedure
The following figure shows the basic procedure for the selection of a JOG function from the
machine control panel (MCP) to the NC.
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Axes and spindles
Function Manual, 06/2019, A5E47437747B AA