Program Runtime/Part Counter; Program Runtime - Siemens SINUMERIK 840D sl Programming Manual

3.22

Program runtime/part counter

Information on the program runtime and workpiece counter is provided to support the machine
tool operator.
This information can be processed as system variables in the NC and/or PLC program. This
information is also available to be displayed on the operator interface.
3.22.1

Program runtime

The "program runtime" function provides internal NC timers to monitor technological
processes, which can be read into the part program and into synchronized actions via the NC
and channel-specific system variables.
The trigger for the runtime measurement ($AC_PROG_NET_TIME_TRIGGER) is the only
system variable of the function that can be written to – and is used to selectively measure
program sections. This means, by writing $AC_PROG_NET_TIME_TRIGGER in the NC
program, the time measurement can be enabled and disabled again:
System variable
NC-specific
$AN_SETUP_TIME
$AN_POWERON_TIME
Channel-specific
$AC_OPERATING_TIME
$AC_CYCLE_TIME
$AC_CUTTING_TIME
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Meaning
Time since the last control power up with default values
("cold restart") in minutes.
Is automatically reset to "0" every time the control pow‐
ers up with default values.
Time since the last normal control power up ("warm
restart") in minutes.
Is automatically reset to "0" every time the control pow‐
ers up normally.
Total runtime of NC programs in automatic mode in
seconds.
The value is automatically reset to "0" every time the
control powers up.
Runtime of the selected NC program in seconds.
The value is automatically reset to "0" every time a new
NC program starts up.
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.
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.
Work preparation
3.22 Program runtime/part counter
Activity
● Always active
● Activated via
MD27860
● Only AUTOMATIC
mode
983