Siemens SINUMERIK 840D sl Function Manual page 759

2.12 Program runtime/workpiece counter
2.12.1 Function
The functions: "Program runtime" and "Workpiece counting" are not identical to the
corresponding tool management functions, but are intended to support machines, which
have no explicit tool management.
2.12.2 Program runtime
Function
The function "Program runtime" makes the NC internal timers available to monitor
technological processes via system variable.
NC-specific system variable
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.
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Significance
Time since the last control powerup
with default values ("Cold start" in min.)
Time since the last normal control
powerup ("Warm start" in min.)
2.12 Program runtime/workpiece counter
Description
Count the time since the last control system run-
up with default values.
Is reset automatically in case of each control
system run-up with default values.
Count the time since the last normal run-up of the
control system.
Is reset automatically in case of each normal run-
up of the control system.
Detailed description
201