YASKAWA JEPMC-CP3201-E - Page 147

3.3 Multi-CPU Functions
Sub CPU Synchronization
3-97
3
CPU Unit Functionality
• You can have one Sub CPU Unit on the Main Rack and a total of three Sub CPU Units on Expansion
Racks. You can therefore connect up to four Sub CPU Units in one system.
• The Optional Modules that are connected immediately to the right side of a CPU Unit are controlled by
that CPU Unit.
• You can use the CPU interface registers for that CPU Unit to exchange up to 2,048 words of data each
scan.
• You can completely synchronize the Main CPU Unit and Sub CPU Units. The following figure shows a
timing chart.
Conditions for Using Sub CPU Synchronization
To use Sub CPU synchronization, conditions for the product versions and for the high-speed scan set val-
ues must be met.
 Applicable Versions
You must use the following versions of the CPU Units and MPE720.
Name Model Abbreviation Applicable Versions
CPU Units
JEPMC-CP3201-E CPU-201 Version 1.06 or higher
JEPMC-CP3202-E CPU-202 All versions
MPE720 CPMC-MPE780 − Version 7.21 or higher
High-speed scan
of Main CPU Unit
High-speed scans
of Sub CPU Units 1 to 4
4 ms
1 ms
Synchronized.
Synchronized.
Synchronized.