5
ACCESS VIA NETWORK MODULES
5.3 MELSECNET/H Module Access Function
5.3.1 Message communication
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1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
ACCESS VIA NETWORK
MODULES
6
PREPARATORY
PROCEDURES AND
SETTING
7
I/O NUMBER
ASSIGNMENT
8
MEMORIES AND FILES
5.3.1 Message communication
The C Controller module can transfer messages (message transmission/reception) by
user programs.
Messages can be transferred among the following modules via a MELSECNET/H module.
In a multiple CPU system configuration, any access via a MELSECNET/H module
controlled by another CPU is not allowed.
• C Controller module on another station
• Programmable controller CPU
• Personal computer with a MELSECNET/H board
(1) Message transmission
Messages are sent with user programs in which communication functions for
message transmission are used.
(2) Message reception
Messages are received with user programs in which communication functions for
message reception are used.
The C Controller module has an internal buffer for message reception.
The data stored in this internal receive buffer are read out.
Q06CCPU-V-B
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