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CHAPTER 1 OVERVIEW
1
(3) Data communications among CPU modules
The following data communications can be performed among CPU modules in a multiple CPU system.
(a) Transferring data among CPU modules
Data can be transferred among CPU modules by setting auto refresh using a programming tool.
( Page 122, Section 6.1.1 to Page 135, Section 6.1.2)
(b) Reading data from other CPU modules
Each CPU module can read data from other CPU modules whenever required using the following instructions.
( Page 150, Section 6.1.3)
• Read instruction from the CPU shared memory in another CPU module
• Cyclic transmission area device (U3En\G)
(c) Directing control to the Motion CPU
The QCPU can direct control to the Motion CPU using the following instruction. ( Page 160, Section 6.2)
• Motion dedicated instruction
(d) Reading/writing device data to/from the Motion CPU
The QCPU can read/write device data to/from the Motion CPU using the following instructions.
( Page 162, Section 6.3.1)
• Multiple CPU transmission dedicated instruction
• Multiple CPU high-speed transmission dedicated instruction
(e) Issuing events to the C Controller module or PC CPU module
The QCPU can issue events to the C Controller module or PC CPU module using the following instruction.
( Page 164, Section 6.3.2)
• Multiple CPU transmission dedicated instruction
The Universal model QCPU (except the Q00UCPU, Q01UCPU, and Q02UCPU) can execute the motion
dedicated instruction multiple times in one scan. Since the motion dedicated instruction can be executed
consecutively to different axis numbers, delay time of servo startup intervals can be shortened.
(f) Logging communication data among CPU modules
Communication data among CPU modules can be saved to an SD memory card in CSV format by logging the
cyclic transmission area device (U3EnG) using the data logging function of the CPU module.
The high-speed Universal model QCPU supports the data logging function.
( QnUDVCPU/LCPU User's Manual (Data Logging Function))