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

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)
Selection of machine function
The machine functions available in JOG mode can be selected from the following locations:
Via machine control panel (MCP)
Via PLC user program
The PLC user program transfers the machine function pending at the machine-control-panel
interface to the relevant PLC/NCK interface. Here the axis-specific NCK/PLC interface
should be used for a machine axis/spindle, and the channel-specific NCK/PLC interface
should be used for a geometry axis:
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
H1: Manual travel and handwheel travel
→ e.g., user DB interface
→ PLC/NCK interface
4.1 Brief description
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