Chapter 15 Data Communications Using User Frames - Mitsubishi Electric MELSEC iQ-R Series User Manual

15
DATA COMMUNICATIONS USING USER
FRAMES
Registering the fixed format portion of the message transmitted/received by a target device and C24 as a user frame
beforehand allows data transmission/reception using a user frame.
Data transmission/reception using a user frame simplifies the creation of data to be transmitted on the CPU module side, and
the program for checking received data.
This chapter explains the data transmission/reception methods and procedures when communication data using user frames
with the nonprocedural protocol of C24.
Data transmission
Arbitrary data
Arbitrary data
Data reception
C24
For details on "Transparent code" and "ASCII-BIN conversion", refer to the following chapters.
• When using transparent codes (Page 326 TRANSPARENT CODES AND ADDITIONAL CODES)
• When performing data communication using ASCII-BIN conversion (Page 347 COMMUNICATING
WITH ASCII CODE (ASCII-BIN CONVERSION))
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User frame
Target device such as a bar code reader
or ID controller personal computer
User frame