Capacity Evaluation Using Time Requirement For Synchronized Actions - Siemens SINUMERIK 840Di sl Function Manual

2.3.10

Capacity evaluation using time requirement for synchronized actions

Description
In a interpolation cycle, synchronized actions have to be both interpreted and motions
calculated by the NC. The system variables presented below provide synchronized actions
with information about the current time shares that synchronized actions have of the
interpolation cycle and about the computation time of the position controllers.
The variables have valid values only when the machine data
MD11510 $MN_IPO_MAX_LOAD is greater than 0. Otherwise the variables for both
SINUMERIK powerline and solution line systems always specify the net computing time
during which the interrupts caused by HMI are no longer taken into account. The net
computing time results from:
• synchronized action time,
• position control time and
• remaining IPO-computing time without interrupts caused by HMI
The variables always contain the values of the
previous IPO cycle.
Figure 2-4
System variables
$AN_IPO_ACT_LOAD
$AN_IPO_MAX_LOAD
$AN_IPO_MIN_LOAD
$AN_IPO_LOAD_PERCENT
Synchronized actions
Function Manual, 11/2006, 6FC5397-5BP10-2BA0
Time components of the synchronized actions in the IPO cycle
Description
current IPO computing time (incl. synchronized actions of all
channels)
longest IPO computing time (incl. synchronized actions of all
channels)
shortest IPO computing time (incl. synchronized actions of all
channels)
current IPO computing time as percentage of IPO cycle (%)
2.3 Special real-time variables for synchronized actions
Detailed description
39