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CHAPTER 2 CONCEPT OF MULTIPLE CPU
SYSTEM
2.1 CPU Numbers
CPU numbers are assigned to identify CPU modules contained in a multiple CPU system.
A CPU module mounted in the CPU slot of a main base unit will be CPU No.1. CPU No.2, No.3, and No.4 will be
assigned sequentially to the right of CPU No.1.
(1) Available CPU numbers
Available CPU numbers differ depending on the QCPU used as CPU No.1 and the main base unit used.
( Page 31, CHAPTER 3)
Ex.
When a Basic model QCPU is used as CPU No.1, the total number of mountable CPU modules is three
(CPU No.1 to No.3). However, when a slim type main base unit (Q3SB) or multiple CPU high-speed
main base unit (Q3
DB) is used, the number of mountable CPU modules is limited to one or two (CPU
No.1 and No.2).
CPU 0 1 2 3 4
CPU slot: CPU No.1
Slot 0: CPU No.2
Slot 1: CPU No.3
Slot 2: CPU No.4
Slot number
CPU number
1
1
4
3
2