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CHAPTER 6 COMMUNICATIONS AMONG CPU
MODULES
This chapter describes data communications among CPU modules in a multiple CPU system.
(1) Communication methods
The following table lists the communication methods available among CPU modules.
Item Description Reference
Communications using the CPU shared
memory
Data communications is performed among CPU modules using
the internal memory of each CPU module.
Page 118, Section 6.1
Auto refresh
(using the auto refresh area)
Data communications is automatically performed among CPU
modules in accordance with the settings in the programming
tool.
Page 122, Section 6.1.1
Auto refresh
(using the multiple CPU high-speed
transmission area)
Page 135, Section 6.1.2
By programs
Data communications is performed among CPU modules by
executing programs.
Page 150, Section 6.1.3
Communications by motion dedicated
instructions
Data communications is performed between a QCPU and a
Motion CPU by executing motion dedicated instructions.
Page 160, Section 6.2
Communications among CPU modules by
dedicated instructions
Data communications is performed among CPU modules by
executing dedicated instructions.
–
Reading/writing device data between
QCPU and Motion CPU
Device data are read/written between a QCPU and a Motion
CPU.
Page 162, Section 6.3.1
Starting an interrupt program from
QCPU to C Controller module/PC
CPU module
An interrupt program is started from a QCPU to a C Controller
module/PC CPU module.
Page 164, Section 6.3.2
Reading/writing device data between
QCPUs
Device data are read/written between Universal model QCPUs
(except the Q00UCPU, Q01UCPU, and Q02UCPU).
Page 165, Section 6.3.3