Siemens SINUMERIK 808D User Manual page 137

Ti mers that are activated via machine data
The following timers are activated via machine data (default setting).
Each active run-time measurement is automatically interrupted in the stopped program state or for feedrate-override-zero.
The behavior of the activated timers for active dry run feedrate and program testing can be specified using machine data.
● $ AC_OPERATING_TIME
Total execution time in seconds of NC programs in "AUTO" mode
In "AUTO" mode, the runtimes of all programs between program start and end are summed up. The timer is zeroed after
each power-up of the control system.
● $ AC_CYCLE_TIME
Runtime of the selected NC program (in seconds)
The runtime between program start and end is measured in the selected NC program. The timer is reset with the start of
a new NC program.
● $ AC_CUTTING_TIME
Tool action time (in seconds)
The runtime of the path axes is measured in all NC programs between program start and end without rapid traverse
active and with the tool active (default setting).
The measurement is interrupted when a dwell time is active.
The timer is automatically set to zero after each power-up of the control system.
Programming example
N10 IF $AC_CUTTING_TIME>=R10 GOTOF WZZEIT
G0 X20 Y20
N80 WZZEIT:G0 X30 Y30
N90 MSG("Tool action time: Limit value reached")
N100 M0
M30
D i splay
The content of the active system variables is visible in the window opened through the following key operations:
→
Wi ndow display:
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
→
; Tool operation time limit value?
137