Specifications

4 - 3
4.1.2 Message sending function using the logical channel numbers
The message sending function using the logical channel numbers *
1
is useful when
there are many kinds of information and the receiving station side needs to selectively
receive only some of the send messages.
The sending station side is equivalent to a broadcast station that delivers messages to
logical channels, and the receiving station side is equivalent to a television receiver in
an ordinary household that can switch between logical channels.
The sending station side executes the transient transmission by attaching an address
for a logical channel without designating a specific station number (although the
designation of station numbers is also possible). All the other stations on a single
network receive the send data, and then the receiving stations delete the messages
except for the messages whose logical channel number matches with the one set by
the receiving stations.
*1: The logical channel refers to an input channel that can be changed by the
sequence program. There are eight physical input channels, but up to 64
channel numbers can be set by modifying the special link register value.
(1) Visual representation of the function
CPU
Network module
Send side
Sending to
logical
channel 9
Receive side
Logical
channel 16
Create data
command
Send
message
data creation
J.SEND
Send
command
Device memory
Send message
data
CPU
Network module
8
3
Channel 1
2
Receive
side
Logical
channel 15
Channel 1
J.RECV
Receive
command
Device memory
8
3
2
8
3
2
Sending to logical channel 9
Receive side
Logical
channel 10
Receive side
Logical
channel 15
Receive side
Logical
channel 9
Receive side
Logical
channel 9
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Sending to logical channel 9
Sending to logical channel 9
CPU
Network module
CPU
Network module
channel 14
channel 12
channel 10
channel 9
Receive
side
Channel 1
Logical
channel 15
channel 14
channel 12
channel 10
channel 13
J.RECV
Receive
command
Device memory
J.RECV
Receive
command
Device memory
Channel 1
Receive
side
Logical
channel 15
channel 14
channel 12
channel 16
channel 9