Data Communication Using The Non Procedure Protocol - Mitsubishi QJ71C24N User Manual

6 DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL

MELSEC-Q
6 DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL
Data communication using the non procedure protocol is a function for sending and
receiving data between a programmable controller CPU and an external device using
the message format and transmission control procedure specified by the user.
Data can be transferred using the non procedure protocol when it is necessary to
perform data communication using the protocol for external devices such as a
measuring instrument and a bar code reader. In that case, transmission/receive data
processing can be simplified by using the communication functions with the user
frames described in the User's Manual (Application).
This chapter explains the basic transmission and reception methods when performing
data communication using the non procedure protocol.
Follow the procedure described in this chapter to create sequence programs for
sending and receiving data for the programmable controller CPU.
For details on the additional functions listed below for data communication using the
non procedure protocol, see the separate User's Manuals (Application).
• Sending/receiving data using user frames
• Monitoring the programmable controller CPU (automatic information function)
• Switching modes from the programmable controller CPU
• Reading received data using interrupt programs
• Sending/receiving data using transparent code designation
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• Sending/receiving data using ASCII data (ASCII-BIN conversion)
• Controlling half-duplex communication
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