TECHNICAL NOTE
MOTION APPLICATION ENGINEERING GROUP
Yaskawa Electric America - 2121 Norman Drive South – Waukegan IL 60085
(800) YASKAWA - Fax (847) 887-7280
11/23/2005 16 of 16 eng/05.055/MCD
Drawing Execution Chart
The above drawing execution chart graphically illustrates the Drawing Family and Function table
from the previous page.
• At power up, the A drawing executes AND completes before other drawings execute.
The A drawings execute once only at power up.
• The high scan drawings always complete within the high speed scan set time as
illustrated above.
• In the remaining time of the high speed scan, the low scan drawings execute in time
slices until they complete execution within the low speed scan set time.
• At the completion of the low scan drawings, background system tasks are executed.
• If an interrupt condition occurs, the I drawing executes immediately, then normal
scanning resumes.
• Setting Parameters and Monitor Parameters are updated each high speed scan while
low scan I/O updates occur every low speed scan set time.
The update of I/O and parameters as well as understanding drawing execution is critical to
code development so that the proper interlocks exist to obtain expected logical results.
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