4
FUNCTIONS
4.4 MELSECNET/H Module Access Function
4.4.1 Message communication
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OVERVIEW
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SYSTEM
CONFIGURATION
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SPECIFICATIONS
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FUNCTIONS
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SETTING AND
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I/O NUMBER
ASSIGNMENT
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MEMORIES AND
FILES
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INSTALLING /
UNINSTALLING
4.4.1 Message communication
The C Controller module can make message communication (message transmission/
reception) by a user program.
Messages can be transferred among the following modules via a MELSECNET/H module
controlled by the C Controller module.
• C Controller module on other station
• Programmable controller CPU
• Personal computer with the MELSECNET/H board built-in
(1) Message transmission
Messages are sent with the user program in which the data link functions for message
transmission are used.
Refer to this section (3) for the data link functions for message transmission.
(2) Message reception
Messages are received with the user program in which the data link functions for
message reception are used.
The C Controller module has the internal buffer for message reception.
The data stored in this internal receive buffer are read out in message reception.
Refer to this section (3) for the data link functions for message reception.
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