Siemens SINUMERIK 828D Function Manual page 664

K1: Mode group, channel, program operation, reset response
9.16 Program runtime / Part counter
Note
Residual time for a workpiece
If the same workpieces are produced one after the other, then from the timer values:
• Processing time for the last workpiece produced (see $AC_OLD_PROG_NET_TIME)
and
• current processing time (see $AC_ACT_PROG_NET_TIME)
the remaining residual time for a workpiece can be determined.
The residual time is displayed on the operator interface in addition to the current processing
time.
NOTICE
Using STOPRE
The system variables $AC_OLD_PROG_NET_TIME and
$AC_OLD_PROG_NET_TIME_COUNT do not generate any implicit preprocessing stop.
This is uncritical when used in the part program if the value of the system variables comes
from the previous program run. However, if the trigger for the runtime measurement
($AC_PROG_NET_TIME_TRIGGER) is written very frequently and as a result
$AC_OLD_PROG_NET_TIME changes very frequently, then an explicit STOPRE should be
used in the part program.
The following system variables are available for the timers that are activated / deactivated through MD
parameterization:
System variable
$AC_OPERATING_TIME
$AC_CYCLE_TIME
$AC_CUTTING_TIME
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Meaning
Total runtime of NC programs in Automatic mode (in s)
In the ? automatic mode, the runtimes of all programs between NC start and end of
program / ? reset are summed up.
The default is not to count in NC STOP and override = 0%. Continued counting can be
activated at an override of 0% via MD27860.
The value is automatically reset to "0" every time the control powers up.
Runtime of the selected NC program (in seconds)
The runtime between NC Start and End of program / NC-Reset is measured in the selected
NC program.
The default is not to count in NC STOP and override = 0%. Continued counting can be
activated at an override of 0% via MD27860.
The value is automatically reset to "0" every time a new NC program starts up. MD27860
can be set to ensure that this value will be deleted even if there is a jump to the beginning
of the program with GOTOS or in the event of ASUBs and PROG_EVENTs starting.
Processing time in seconds
The runtime of the path axes (at least one is active) is measured in all NC programs
between NC start and end of program/NC reset without rapid traverse active. MD27860
can be used to set whether measuring should only be conducted when the tool is active or
independent of the tool state.
The measurement is interrupted when a dwell time is active.
The value is automatically reset to "0" every time the control powers up with default values.
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions