Siemens SINUMERIK 840D sl Function Manual page 360

K5: Channel synchronization, axis interchange
6.1 Channel synchronization
workpiece spindles or both workpiece spindle aggregates actually move in real terms (where
relevant, including axes at the workpiece).
Note
The "program test" state can only be activated/deactivated in the stopped channel state.
However, the axis-specific NC/PLC interface signal "suppress program test" can always be
activated.
System variables
The "program test" state can be interrogated using system variables:
● For the display in the user interface, in synchronized actions or with a preprocessing stop
in the part program via the system variables:
● Without preprocessing stop in the part program via the system variable:
Example
The channel runs under "program test" and axis "C" was withdrawn using "suppress program
test". A query using system variables then supplies the following result:
$AC_ISTEST == TRUE
$P_ISTEST == TRUE
$AA_ISTEST[C] == FALSE
Supplementary conditions
Axis interchange
The "axis interchange" function allows that an axis/spindle is known in several channels and
can be programmed by these alternately (see Section "Axis replacement (Page 363)").
360
$AC_ISTEST
$AA_ISTEST[<n>]
$P_ISTEST
"Program test" state for the channel
Supplies TRUE (1), if the "program test" state for the channel is active.
"Program test" state for the axis <n>
Supplies TRUE (1), if the "program test" state for axis <n> is active.
Supplies TRUE (1), if the "program test" state for the channel is active.
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions