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3
SPECIFICATIONS
3.6 Details of Buffer Memory
3.6.9 Link relay (B0 to BFFF)
3 - 28
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
3.6.9 Link relay (B0 to BFFF)
The data of a link relay (B0 to BFFF) for the B/W communication is stored.
Refresh devices of the CPU module and the data in this area using the following area in a
sequence program.
• Presence or absence of refresh information table (Buffer memory address: 0
H,
1
H)
• Refresh information table (Buffer memory address: 2
H to 27H)
The following shows the refresh of a link relay (B) for the case where link parameters are
set as shown below and a local module is a local station in the third tier (l1 station).
Figure 3.16 Link parameter setting
Figure 3.17 Refresh of link relay (B)
Link parameters of second tier
ML1
100 200
L2/m
300 400
200
L2/m
300
l1
280
l2
2C0
M
L1
Second
tier
l1l2
Third
tier
L2/m
B/W 0
ML1
L2/m
500 600 700 FFF
(Empty)(Empty)
600
L2/m
700
l1
680
l2
6C0B/W 0 FFF
Link parameters of master station for third tier (L2/m)
First half of link parameters Latter half of link parameters
First half of link parameters Latter half of link parameters
B200 to B20F
B270 to B27F
Local module CPU module
Other station send range (1)
(First half of link parameters)
Send range of master station for second tier
(First half of link parameters)
Host station send range
(First half of link parameters)
Other station send range (2)
(First half of link parameters)
Other station send range (1)
(Latter half of link parameters)
Send range of master station for second tier
(Latter half of link parameters)
Host station send range
(Latter half of link parameters)
Other station send range (2)
(Latter half of link parameters)
Link relay (B) Link relay (B)
250
H
25FH
270H
27FH
290H
29FH
2B0H
2BFH
277H
278H
27BH
27CH
2B7H
2B8H
2BBH
2BCH
34FH
B0 to BF
BF0 to BFF
B0 to BF
BF0 to BFF
B200 to B20F
B270 to B27F
B280 to B28F
B2B0 to B2BF
B280 to B28F
B2B0 to B2BF
B2C0 to B2CF
B2F0 to B2FF
B2C0 to B2CF
B2F0 to B2FF
B600 to B60F
B670 to B67F
B400 to B40F
B4F0 to B4FF
B680 to B68F
B6B0 to B6BF
B6C0 to B6CF
B6F0 to B6FF
B400 to B40F
B4F0 to B4FF
B600 to B60F
B670 to B67F
B680 to B68F
B6B0 to B6BF
B6C0 to B6CF
B6F0 to B6FF