YASKAWA MP210 Series User Manual page 56

2 Specifications and Functions
2.2.5 Built-in SVB Modules
• Waiting for monitor information to be refreshed
An Optional SVB Module (SVB-01) communicates data with the CPU of the Machine Controller using
actual shared memory, but the time lapse until it becomes possible to monitor the motion parameters created
at the SVB-01 Module with the CPU's application is one scan longer than if the same processing were done
with a Built-in SVB Module (see the figures below).
<Progress of Processing at a Built-in SVB Module>
Output processing
CPU H scan
processing
Virtual shared
memory
SVB H scan
processing
<Progress of Processing at an Optional SVB Module>
Output processing
CPU H scan
processing
Shared memory
SVB
internal work
SVB-01 H scan
processing
When the "wait for monitoring information to be refreshed" mode is enabled, this delay is eliminated and
monitoring of motion parameters with the same timing as a Built-in SVB Module is enabled. However, since
the start of execution of the CPU's application is delayed until completion of the SVB-01 Module's motion
processing, the CPU's high-speed scan processing time is lengthened.
2-24
Input processing
Motion
processing
Copying of setting parameters
Input processing
H scan application
DWG.H
I/O input
Motion
processing
Copying of setting parameters
Monitor parameter output
Output processing
H scan application
(DWG.H)
H scan cycle
Output processing
H scan cycle
Input processing
Motion
processing
Copying of setting parameters
Input processing
H scan application
DWG.H
I/O input
Motion
processing
Copying of setting parameters
Monitor parameter output
H scan application
DWG.H