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2
SYSTEM CONFIGURATION
2.1 Overall System Configuration
2 - 1
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
PREPARATORY
PROCEDURES BEFORE
OPERATION
6
LINK DATA SEND/
RECEIVE PROCESSING
AND PROCESSING TIME
7
PROGRAMMING
8
TROUBLESHOOTING
CHAPTER2 SYSTEM CONFIGURATION
This chapter describes the system configuration of a local module.
2.1 Overall System Configuration
(1) MELSECNET data link system
MELSECNET data link system is a system which connects the master station and
slave stations (local station and remote I/O station) via an optical fiber cable or a
coaxial cable.
• Up to 64 local and remote I/O stations in total can be connected to one master
station for the second tier.
• Up to 64 local and remote I/O stations in total can be connected to one master
station for the third tier.
POINT
A local module cannot be the master station or a remote I/O station since it is a
module dedicated to a local station.
Figure 2.1 MELSECNET data link system
Third tier
No.1
No.2
No.3
No.4
Second tier
No.1
No.2
No.3
No.4
Optical fiber cable
or coaxial cable
Optical fiber cable
or coaxial cable
Station that can mount
local module
Master station
Local station
Local stationLocal station
Remote I/O
station
Remote I/O
station
Local stationLocal station
Master station
Local stationLocal station Local stationLocal station
Local stationLocal station
Remote I/O
station
Remote I/O
station
Local stationLocal station
No.n
(n 64)
No.n
(n 64)