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MELSEC
1 OVERVIEW
(9) External power supply allows continuous network communication
even during power-off of personal computer. (Function of the
Q80BD-J71LP21S-25)
Since power is supplied externally, the Q80BD-J71LP21S-25 can continue
network communication (baton passing) even if a personal computer is powered
off and data link cannot be performed.
Therefore, a normally operating station connected between other stations with
power-off computers will not be disconnected from the data link.
Another advantage is that the link scan time is stabilized since loopback can be
also prevented.
Q80BD
-J71
LP21
-25
QJ71
LP21
-25
Q80BD
-J71
LP21S
-25
Q80BD
-J71
LP21
-25
Q80BD
-J71
LP21S
-25
QJ71
LP21
-25
Q
CPU
Q
CPU
Normal station
(Station No.3)
Personal
computer
External power
supply
Control station
(Station No.1)
Personal
computer
Normal station
(Station No.2)
Personal
computer
Personal
computer
Normal station
(Station No.6)
Normal station
(Station No.5)
Normal station
(Station No.4)
External power
supply
Data link continued
When station No. 3 and No.5 use MELSECNET/H boards without the external
power supply function and if their personal computers are powered off, station
No.4 is cut off from the network as well as No.3 and No.5.
Station No.1
Station No.2
Station No.3
Station No.6
Station No.5
Station No.4
Personal computer
Personal computer
Disconnected
Содержание Q80BD-J71BR11
Страница 2: ......
Страница 24: ...A 22 A 22 MEMO ...
Страница 50: ...4 6 4 6 MELSEC 4 FUNCTION MEMO ...
Страница 92: ...6 36 6 36 MELSEC 6 PROCEDURE AND SETTINGS UP TO THE POINT OF OPERATION MEMO ...
Страница 132: ...10 2 10 2 MELSEC 10 MELSEC DATA LINK LIBRARY MEMO 10 ...
Страница 138: ...11 6 11 6 MELSEC 11 PROGRAMMING MEMO ...
Страница 164: ...12 26 12 26 MELSEC 12 APPLICATION FUNCTIONS MEMO ...
Страница 166: ...13 2 13 2 MELSEC 13 ERROR CODE MEMO 13 ...
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