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Direct access
This method is used for direct access to devices in a network module from a user program. The link device data in the network
module is transmitted cyclically to another station.
C Controller module
User program
Message communication
A message communication can be performed via a MELSECNET/H network module controlled by a C Controller module.
■Number of channels
For MELSECNET/H network module, up to eight channels can be used for message communication.
C Controller module
(Sending side)
User program
5 ACCESS FUNCTION USING NETWORK MODULE
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5.4 Access Function of Each Network Module
Direct access
MELSECNET/H
MELSECNET/H
network module
network module
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Network No.1
MELSECNET/H
network module
Link device
LX
LY
LB
LW
SB
SW
C Controller module on other
station (Receiving side)
User program
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
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