Control Of Manual-Travel Functions Via Plc Interface - Siemens SINUMERIK 840D sl Function Manual

Geometry axes
In manual travel, a distinction must be made as to whether the affected axis is to be
traversed as a machine axis (axis-specific) or as a geometry axis (channel-specific).
First we will focus on the characteristics of machine axes. Special features relating to manual
traversal of geometry axes are described in more detail in "Geometry-axis manual travel".
Spindle manual travel
Spindles can also be traversed manually in JOG mode. Essentially, the same conditions
apply as for manual travel of axes. Spindles can be traversed in JOG mode using the
traversing keys continuously or incrementally, in jog or continuous mode, or using the
handwheel. The mode is selected and activated via the axis-/spindle-specific PLC interface
as for the axes. The axis-specific machine data also apply to the spindles. Special features
relating to manual traversal of spindles are described in more detail in "Special features of
spindle manual travel".
4.1.3

Control of manual-travel functions via PLC interface

HMI/NCK/PLC interface
Most individual functions required for manual travel in JOG are activated via the PLC user
interface. The machine manufacturer can adapt the manual-travel functionality to the
machine tool depending on the configuration, using the PLC user program.
Machine control panel
The signals between the machine control panel and the individual PLC/NCK-interface data
blocks can be transferred by the PLC user program on a machine-specific basis. The PLC
user program defines the assignment of the direction keys on the machine control panel to
the axis/spindle (machine axes, geometry axes) traversing keys.
The following machine-control-panel signals are of particular importance to manual travel:
● JOG mode (selection)
● Machine function INC1 ...
● Direction keys
● Feedrate override and spindle-speed override
For further information about machine-control-panel signal transmission, see:
References:
/FB1/ Function Manual Basic Functions; PLC Basic Program (P3)
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Manual and Handwheel Travel (H1)
Brief description
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