Figure 5-3 Main Links And Sublinks - Hitachi LQE550 User Manual

5 PROGRAMMING
(5) Operations using main links and sublinks
• Up to 16 CPUs (or LPUs) can be connected by main links or sublinks.
• Allocate G-registers so they will not be transferred in duplicate.
• The G-register data that is transferred over the main link line is not reflected in the CPUs
(or LPUs) connected to the sublink line. Likewise, the G-register data that is transferred
over the sublink line is not reflected in the CPUs (or LPUs) connected to the main link line.
Sample configuration:
Transfer area
G000 to G1FF
CPU1
Main link
G-register area transfer operation:
CPU1
G000
(CPU1)
G200
CPU2-a
G400
CPU3
G600
CPU4
G800
All zero
GA00
All zero
GC00
All zero
GE00
All zero
Transfer area
G800 to G9FF
CPU2
Transfer area
GA00 to GBFF
CPU5
Sublink
CPU2
CPU1
(CPU2-a)
CPU3
CPU4
(CPU2-b)
CPU5
CPU6
CPU7
Data present on the main link line is not
transferred over the sublink line.
CPU5
G000
All zero
G200
All zero
G400
All zero
G600
All zero
G800
CPU2-b
GA00
(CPU5)
GC00
CPU6
GE00
CPU7

Figure 5-3 Main Links and Sublinks

Transfer area Transfer area
G200 to G3FF G400 to G5FF
CPU3
Transfer area
GC00 to GDFF
CPU6
CPU3
CPU1
CPU2-a
(CPU3)
CPU4
All zero
All zero
All zero
All zero
Data present on the sublink line is not
transferred over the main link line.
CPU6
All zero
All zero
All zero
All zero
CPU2-b
CPU5
(CPU6)
CPU7
5-4
Transfer area
G600 to G7FF
CPU4
Transfer area
GE00 to GFFF
CPU7
CPU4
G000
CPU1
G200
CPU2-a
G400
CPU3
G600
(CPU4)
G800
All zero
GA00
All zero
GC00
All zero
GE00
All zero
CPU7
G000
All zero
G200
All zero
G400
All zero
G600
All zero
G800
CPU2-b
GA00
CPU5
GC00
CPU6
GE00
(CPU7)