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Setting Data Links Section 5-2
1:N Allocation, Common Type
Features of Common Type 1:N Allocation
• Data communications are 1:1 between the master node and slave nodes.
• All slave nodes receive the data sent by the master node.
• The master node receives all data sent by the slaves. The reception size
for the master node is thus the node send data size times the number of
slave nodes.
• Slaves do not send or receive data with other slaves.
• Area 1 is selected from the bit-access areas (e.g., CIO Area) and area 2
is selected from 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.
1
4
1
2 2
3
1 1
3 4
1
4
1
2 2
3
1 1
3 4
(7) Participating nodes
Master node Slave nodes
Area 1
(1) Area and start word
(2) Size for master
node
(3) Size for slave node
(Same as (3))
(Same as (3))
Area 2
(4) Type and start word
(5) Size for master
node
(6) Size for slave
node
(Same as (6))
(Same as (6))
Word N
1514131211109876543210
--- ---
00
---
000
---
1 0 1000
---