Siemens SINUMERIK 840D sl Function Manual page 760

Detailed description
2.12 Program runtime/workpiece counter
Channelspecific system variable
The following channel-specific system variables are available
Several channel-specific system variable are available and can be activated via machine
data. Each active runtime measurement is interrupted automatically by a program status
"Program running" and an active override = ZERO.
Dry run feedrate and program testing
The behavior of the active time measurements during the functions: "Dry run feedrate" and
"Program testing" can be specified via machine data.
The following channel-specific system variable are available:
Names
$AC_OPERATING_TIME
$AC_CYCLE_TIME
$AC_CUTTING_TIME
The timers of the system variables must be activated channel-specifically:
MD27860 $MC_PROCESSTIMER_MODE (activation of program runtime measurement)
The system variables are reset to default values on each control power-up.
The timers are automatically activated with the standard machine data for SINUMERIK 802D.
Note
The system variables can be accessed at any time by reading from the HMI operator
interface.
202
Significance
Total runtime of NC programs in
Automatic mode (in s)
Runtime of the selected NC program
(in s; always only one active per
channel)
Tool operating time (in s)
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Description
The runtimes of all programs between NC start
and program end / NC reset are totalled in the
Automatic mode.
It is reset automatically with each control system
run-up.
The runtime between the NC Start and the end of
program/NC reset is measured in the selected NC
program.
It is reset automatically when a new NC program
is started.
The runtime of the path axes (at least one is
active) is measured without active rapid traverse
in all the NC programs between NC start and
program end / NC reset in each active tool.
The measurement is additionally interrupted
duringe active dwell time.
It is reset automatically during each control
system run-up with default values.
Function Manual, 11/2006, 6FC5397-0BP10-2BA0