Omron CP1H CPU Operation Manual page 196

DeviceNet Area
Forcing Bit Status
DeviceNet Area
Initialization
162
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
The DeviceNet Area can be used in programming if a CJ-series DeviceNet
Unit is not used.
Bits in the DeviceNet Area can be force-set and force-reset.
Note There are two ways to allocated 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 according to node addresses.
• With user-set allocations, the user can allocate words to Slaves from the
following words.
CIO 17 to CIO 99, CIO 117 to CIO 6143(See note.)
W0 to W511
H0 to H511
D0 to D32767
For details on word allocations, refer to the DeviceNet Operation Manual
(W267).
Note 0~16CH cannot be assigned as input relay area and 100~116CH as
output relay area.
For XA type, 200~203CH and 210~213CH cannot be assigned as
built-in analog input/output area.
CPU Unit
DeviceNet
Slaves
The contents of the DeviceNet Area will be cleared in the following cases:
1. When the operating mode is changed from PROGRAM to RUN or MONI-
TOR mode or vice-versa and the IOM Hold Bit is OFF
2. When the power is cycled
3. When the DeviceNet Area is cleared from the CX-Programmer
4. When PLC operation is stopped when a fatal error other than an
FALS(007) error occurs (The contents of the DeviceNet Area will be re-
tained when FALS(007) is executed.)
Output Area
(master to slaves)
CIO 3370
CIO 3570
CIO 3770
DeviceNet
Master Unit
DeviceNet Area
With fixed allocation, words are assigned according to node
numbers. (If a Slave requires two or more words, it will be
allocated as many node numbers as words required.)
Section 4-8
Input Area
(slaves to master)
CIO 3270
CIO 3470
CIO 3670