Chapter 13 Serial Communication Module Dedicated Commands; User Frame - Mitsubishi Electric MELSEC IQ-R series Reference Manual

13
SERIAL COMMUNICATION MODULE
DEDICATED COMMANDS
This chapter explains the dedicated commands for serial communication module.
13.1

User Frame

A user frame is a data name which is used to send/receive data by registering the fixed format portion in a message to be
communicated between an external device and serial communication module.
Control code
User frame
Control code or sum check code in the message are registered as a default registration frame.
The data such as an access route can be registered to the user frame.
By using the user frame, the following data communication can be performed.
• Transmission of on-demand data by MC protocol
• Data communication by nonprocedural protocol
This section explains the commands for an external device to register, delete, and read user frames to C24. For transmission
and reception of data using a user frame, refer to the following manual.
 MELSEC-Q/L Serial Communication Module User's Manual (Application)
 MELSEC iQ-R Serial Communication Module User's Manual (Application)
The command can only be used for C24 (including multidrop connection station) connected to the external
device. It cannot be used via network.
This command is processed by the connected C24/E71 without waiting for the END processing by CPU
module.
13 SERIAL COMMUNICATION MODULE DEDICATED COMMANDS
246
13.1 User Frame
such as an access route Arbitrary data
Sum check
Control code
code
User frame