6-1. Computer Link Function Using a C.C.U.
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How to Specify the Network
1)Procedure
1.Specify a target network with the “LC” MEWTOCOL-COM command when a Computer Link function is
used in a W Type(Wire) Link System.
2.Perform the communication using MEWTOCOL-COM.
The station number(UNIT NO.) in the target W Type(Wire) Link Network is used as destination station
number in MEWTOCOL-COM.
3.Specify a different target network with the “LC” MEWTOCOL-COM command when target network is
changed.
2)LC Command
Basic message format
Notes :
Description
•Changes the target network to which the Computer Link communication will be performed.
• Actual communication between the computer and the Programmable Controllers in the specified network is per-
formed using other MEWTOCOL-COM commands which follow the “LC” command. For details about the com-
mands (such as RD or RS) refer to the FP3/FP5 C.C.U.(Computer Communication Unit) Technical Manual.
•To change the target network, use the “LC” command as often as necessary.
• In the relay stations, no more than 3 link units can be installed.
• The C.C.U.(Computer Communication Unit) version should be 1.3 or higher.
• The Computer Link function is available up to a relative depth of 2.
• The Programmable Controllers at the relay stations belong to 2 networks.
Command message
1 When “DEPTH 0” is specified
% A A # L C 0 0 0 0 0 0 0 0 0 0 0 9 CR
Eight Zeroes
Depth 0 BCC
2 When “DEPTH 1” is specified
% A A # L C 0 0 0 0 0 0 0 0 0 1 A A 0 0 0 9 CR
Eight Zeroes
Two "A"s
BCC
Depth 1
Two Zeroes
3 When “DEPTH 2” is specified
% A A # L C 0 0 0 0 0 0 0 0 0 2 A A
0 0 0 0
CR
Eight Zeroes
Two "A"s
Four Zeroes
BCC
Depth 2
The staion number of the relay station in the
network at depth one, which connects network
depth one to network depth two.
Response message
% A A $ L C 0 9 CR
BCC
