Siemens SINUMERIK Series Function Manual page 317

Extended functions

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A system comprises a main spindle and counterspindle. Two slides can operate on both the

main spindle and counterspindle. Each slide is controlled from a separate channel. The main

spindle is in channel 1, the counterspindle in channel 2. Channel 1 is tested and channel 2 is

disabled using the channel-specific NC/PLC interface signal DB21, ... DBX1.7 (activate

program test). The two workpiece spindles - main spindle and counterspindle - play

somewhat of a "special role". A workpiece can be machined, without having to absolutely

traverse the workpiece spindle in real terms in the channel. This is the reason why it is

necessary that both workpiece spindles or both workpiece spindle aggregates actually move

in real terms (where relevant, including axes at the workpiece).

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

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

$AA_ISTEST[<n>]

● Without preprocessing stop in the part program via the system variable:

The channel runs under "program test" and axis "C" was withdrawn using "suppress program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

Extended Functions

Function Manual, 03/2013, 6FC5397-1BP40-3BA1

in the part program via the system variables:

"Program test" state for the channel

Supplies TRUE (1), if the "program test" state for the channel is

"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

K5: Mode groups, channels, axis interchange

5.3 Channels - only 840D sl

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