Devicenet Area - Omron CJ2 - 02-2010 User Manual

6 I/O Memory Areas
6-8

DeviceNet Area

The DeviceNet Area address range from CIO 3200 to CIO 3799 for words and CIO 3200.00 to CIO
3799.15 for bits.
Words in the DeviceNet Area are allocated to Slaves for DeviceNet remote I/O communications. Data is
exchanged regularly with slaves in the network (independent of the program) through the DeviceNet
Unit.
Words are allocated to slaves using fixed allocations according to fixed allocation settings 1, 2, and 3.
One of these fixed areas is selected.
Area
Fixed Allocation Area 1
Fixed Allocation Area 2
Fixed Allocation Area 3
The following words are allocated to the DeviceNet Unit when the remote I/O slave function is used with
fixed allocations.
Area
Fixed Allocation Area 1
Fixed Allocation Area 2
Fixed Allocation Area 3
Additional Information
There are two ways to allocate I/O in DeviceNet networks: Fixed allocations according to node
addresses and user-set allocations.
• With fixed allocations, words are automatically allocated to the slaves in the specified fixed
allocation area (1 to 3) according to the node addresses.
• With user-set allocations, the user can allocate words to Slaves from the following words.
CIO 0 to CIO 6143
W0 to W511
H0 to H511
D0 to D32767
E00_0 to E0C_32767, Banks: 0 to 18 hex
(You cannot specify an EM bank that is higher than C.)
For details on word allocations, refer to the DeviceNet Operation Manual (Cat. No. W267).
DeviceNet
Slaves
6-18
Output Area (master to slaves)
CIO 3200 to CIO 3263
CIO 3400 to CIO 3463
CIO 3600 to CIO 3663
Output Area (master to slaves)
CIO 3370
CIO 3570
CIO 3770
DeviceNet
Master Unit
CPU Unit
With fixed allocation, words are assigned according to node
numbers. (If a Slave requires two or more words, it will occupy
as many node numbers as required to obtain enough words.)
CIO 3300 to CIO 3363
CIO 3500 to CIO 3563
CIO 3700 to CIO 3763
CIO 3270
CIO 3470
CIO 3670

DeviceNet Area

Input Area (slaves to master)
Input Area (slaves to master)
CJ2 CPU Unit Software User's Manual