Siemens SINUMERIK 840Di Function Manual page 695

NC-specific system variables
The following NC-specific system variables are available:
Names
$AN_SETUP_TIME
$AN_POWERON_TIME
The timers of the system variables are always active.
All system variables are reset to default values on each control power-up.
Channelspecific system variables
The following channel-specific system variables are available
Several channel-specific system variables 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 variables are available:
Names
$AC_OPERATING_TIME
$AC_CYCLE_TIME
$AC_CUTTING_TIME
Mode Group, Channel, Program Operation, Reset Response (K1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Meaning
Time since the last control powerup
with default values ("Cold start" in min.)
Time since the last normal control
powerup ("Warm start" in min.)
Meaning
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)
2.12 Program runtime/workpiece counter
Description
Counts the time since the last control powerup
with default values.
It is automatically reset to the default values each
time the control is powered up.
Counts the time since the last normal control
powerup.
It is automatically reset to the default values on
each normal control powerup.
Description
Totals the accumulated runtimes of all programs
between NC Start and end of program/NC reset.
It is automatically reset each time the control is
powered 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 measurement produces the runtime of the
path axes (at least one is active) without active
rapid traverse in all NC programs between NC
Start and program end/NC reset with active tool.
The measurement is also interrupted when a
dwell time is active.
It is automatically reset to the default values each
time the control is powered up.
Detailed Description
2-159