Positioning Axes (P2)
17.2 Permanently assigned PLC axis
Turning, Milling, Nibbling
308 Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Applications
Typical applications for concurrent positioning axes include:
● Tool magazines with manual loading and unloading during machining
● Tool magazines with tool preparation during machining
17.2 Permanently assigned PLC axis
Function
The option of controlling an axis from the PLC is controlled via the machine data MD30460
BASE_FUNCTION_MASK.
Commissioning
The permanently assigned PLC axis is activated by machine data
MD30460 BASE_FUNCTION_MASK on Bit 5 = 1
If the PLC axis has rotary axis functionality, the following must also be set:
● MD30300 IS_ROT_AX = 1
● MD30310 ROT_IS_MODUL == 1
● MD30320 DISPLAY_IS_MODULO = 1
During acceleration the axis becomes a neutral axis. When a traverse request is transferred
via the VDI interface, a neutral axis without preceding axis replacement, automatically
changes to a competing positioning axis (PLC axis).
After completing the traverse, if, for instance, the programmed end position has been
reached, or if the traverse has been interrupted, the axis again becomes the neutral axis. In
this condition the axis can be moved or referenced via
JOG with the traverse keys or the handwheel.
Note
A permanently assigned PLC axis cannot be replaced.
The following functions are not possible for a permanently assigned PLC axis:
● Replacement to command axis
● Replacement to oscillation axis
● Assignment of the axis to the NC program
The permanently assigned PLC axis reports its properties via the VDI interface with IS
V390x 0011.7 (permanently assigned PLC axis) to the PLC.
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