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Setting Data Links Section 5-2
1:N Allocations, 1 to 1 Type
Features of 1 to 1 Type 1:N Allocation
• Data communications are 1:1 between the master node and slave nodes.
• All slave nodes receive part of the data sent by the master node. In addi-
tion, each slave node receives unique data from the master node (see a
to d in figure).
• The master node receives all data sent by the slaves. The data sizes are
fixed for all nodes.
• Slaves do not send or receive data with other slaves.
• One area is selected from the bit-access areas (e.g., CIO Area) or word-
access areas (e.g., DM Area).
• Data link areas are allocated in ascending order of node addresses.
• Data link participation can be specified for each node.
Address N: D30000 + (100
× Controller Link Unit number)
When bits 6, 5 and 4 are set to 1, 0 and 1 respectively, automatic setting with
1:N allocations is specified.
4
1b
2
2
3
1c 1d
3 4
1a
1a 1a1a
1b
1c
1d
(5) Participating nodes
(1) Area and start word
(2) Number of master common
send words
(3) Number of master individual
send words
(Same as (3))
(Same as (3))
(4) Number of slave
send words
(Same as (4))
(Same as (4))
Master node Slave nodes
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
--- ---
00
---
000
---
1 0 1000
---
Word N