Filter
Top Products
5
PREPARATORY PROCEDURES BEFORE
OPERATION
5.5 Self-diagnostic Test
5.5.2 Station-to-station test
5 - 16
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
5.5.2 Station-to-station test
The station-to-station test checks a line between two adjacent stations.
A test is performed to a line between two stations assuming that the station which has the
small station No. is the executing station and the other is the other station.
The line is judged by whether the data sent from the executing station can be sent from the
other station in a given time.
(1) System configuration
(a) MELSECNET(A1SJ71AP23Q)
An optical fiber cable connects OUT of the executing station and IN of the other
station.
(b) MELSECNET(A1SJ71AR23Q)
A coaxial cable connects OUT of the executing station and IN of the other station.
Figure 5.18 MELSECNET(A1SJ71AP23Q)
Figure 5.19 MELSECNET(A1SJ71AR23Q)
Executing station
No.n
Other station
No.n+1
OUT IN
Front Front
OUT IN
Data flow of
forward loop
Data flow of reverse loop
Optical fiber cable
Station
No.01
Station
No.02
Front Front
R-RD
F-SD
F-RD
R-SD
INOUT
R-RD
F-SD
F-RD
R-SD
INOUT
Coaxial cable
Executing station No.n Other station No.n+1
Data flow of
reverse loop
Data flow of
forward loop
Station No.01 Station No.02