Data Transmission Process - Mitsubishi Electric MELSEC iQ-R Series User Manual

Data transmission process

The data is transmitted among the memories of the Motion module with steps (1) to (9) shown below.
The data transmission patterns correspond to the numbers (1) to (9) in the following referential drawings.
Data transmission pattern
(1) Transmitting data when power is turned ON or CPU module is reset
(2) Transmitting data with TO command from CPU module
(3) Valid parameters when PLC READY signal [Y0] changes from OFF to ON
(4) Accessing with FROM command from CPU module
(5) Writing the flash ROM by a CPU module request
(6) Writing the flash ROM by a request from the engineering tool
(7) Reading data from buffer memory/internal memory to the engineering tool
(8) Writing data from the engineering tool to buffer memory/internal memory
(9) Transmitting servo parameter
(1) Transmitting data when power is turned ON or CPU module is reset
When the power is turned ON or the CPU module is reset, the "parameter area (c)
stored (backed up) in the flash ROM/internal memory (nonvolatile) are transmitted to the buffer memory and internal memory.
*1 For details, refer to the following.
Page 550 Details of areas
(2) Transmitting data with TO command from CPU module
The parameters or data is written from the CPU module to the buffer memory using the TO command.
At this time, when the "parameter area (b)
memory with the TO command, it is simultaneously validated.
*1 For details, refer to the following.
Page 550 Details of areas
(3) Valid parameters when PLC READY signal [Y0] changes from OFF to ON
When the PLC READY signal [Y0] changes from OFF to ON, the data stored in the buffer memory's "parameter area (a)
validated.
*1 For details, refer to the following.
Page 550 Details of areas
The setting values of the parameters that correspond to parameter area (b) are valid when written into the
buffer memory with the TO command. However, the setting values of the parameters that correspond to
parameter area (a) are not validated until the PLC READY signal [Y0] changes from OFF to ON.
(4) Accessing with FROM command from CPU module
The data is read from the buffer memory to the CPU module using the FROM command.
(5) Writing the flash ROM by a CPU module request
The following transmission process is carried out by setting "1" in "[Cd.1] Flash ROM write request".
• The "parameters", "positioning data (No.1 to 600)", and "block start data (No.7000 to 7004)" in the buffer memory/internal
memory area are transmitted to the flash ROM/internal memory (nonvolatile).
12 DATA USED FOR POSITIONING CONTROL
554
12.9 Memory Configuration and Data Process
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*1
", "positioning data", "block start data", and "control data" are written into the buffer
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Referential drawing
Page 557 Pattern (1) to (4)
Page 558 Pattern (5) and (6)
Page 559 Pattern (7) and (8)

*1
", "positioning data", and "block start data"
*1
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