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 18 of 18 eng/05.055/MCD
Best Practice drawing usage
A-Drawings
This drawing family is best used for initial system setup since it is executed only
once upon power up. WARNING: A-Drawings do not re-run after a CPU
RUN/START from a CPU stop state.
Clear Memory Registers
MP controllers retain the state of M registers with a battery. All memory
register states are retained through power loss. Safety reasons dictate
that machine states such as Auto/Manual and Run/Stop should be
initialized to a desired value to avoid dangerous situations should a
power outage occur.
Initialization Function Blocks
RDAINIT1 and RDAINIT2 functions blocks are placed in this drawing
family to setup Function Block programming environment.
It is recommended to set the registers to zero in the H-drawing using s system bit
that comes on only for the first scan. Best practice is to set constant values into
registers using a Low Speed L drawing (L40 in particular).
I-Drawings
This drawing family is only used for time critical operations. Thanks to recent
improvements in CPU processing speed, the High Speed Scan Interval is usually
fast enough to handle most applications. You can generally avoid using this
family.
H-Drawings
The recommended main drawings are:
- H10: Common machine high-speed processes.
- H20: Machine axes control.
- H30: Machine high-speed auxiliary devices.
Additional drawings:
- H15: Axes trajectory calculation for master-slave processes.
- H25: Motion programs control.
This drawing family is best used for the time critical processing of the application.
All code directly pertaining to motion control should be placed here.
Examples include:
Direct motion register control
Motion critical Function Blocks
Text-based Motion Programs calls.
To Next Page
Loading...
Need help?
General
