Siemens SINUMERIK 840D sl Function Manual page 788

Positioning Axes (P2)
Own channel, positioning axis or concurrent positioning axis
11.2 Own channel, positioning axis or concurrent positioning axis
When axes are provided for auxiliary movements on a machine tool, the required properties
will decide whether the axis is to be:
● is programmed in an internal part program (→ refer to "Own channel (Page 788) ").
● programmed in the same part program as the machining operation (→ refer to
● started exclusively by the PLC during machining (→ refer to "Concurrent positioning axis
11.2.1 Own channel
A channel represents a self-contained NC which, with the aid of a part program, can be used
to control the movement of axes, spindles and machine functions independently of other
channels.
Non-dependence between channels
Independence between channels is assured by means of the following provisions:
● An active part program per channel
● Channel-specific interface signals such as
● One feedrate override per channel
● One rapid traverse override per channel
● Channel-specific evaluation and display of alarms
● Channel-specific display, e.g. for
● Channel-specific testing and channel-specific control of programs:
788
"Positioning axis (posAxis) (Page 789) ").
(Page 791) ").
– DB21, ... DBX7.1 (NC start)
– DB21, ... DBX7.3 (NC stop)
– DB21, ... DBX7.7 (reset)
– Actual axis positions
– Active G functions
– Active auxiliary functions
– Current program block
– Single block
– Dry run (DRY RUN)
– Block search
– Program test
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions