User`s manual

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CHAPTER 9 CONTENTS AND REGISTRATION OF THE USER FRAMES FOR DATA COMMUNICATION
9
9.4 Register/Read/Delete User Frames
9.4.2 Reading user frames
The following shows an example of a sequence program when reading user frames registered in the Q series C24
flash ROM.
For details on the GETE instruction, see Page 389, Section 17.5.
(When the Q series C24 I/O signals are X/Y80 to X/Y9F)
● When an unregistered user frame number is designated, the operation will complete abnormally.
● When the total bytes of data registered in the frame to be read is unknown, read 40 words (80 bytes) by the dedicated
instruction.
● The SPBUSY instruction can be used to read the communication status by the dedicated instruction.
Read request
Sets the frame No. to be read
Sets the allowable number of data
to be read
Executes user frame reading
Normal completion
Abnormal completion
Clears the device in which to store
the read user frame data