Cio Area Allocations; Overview Of The Allocated Cio Area Words - Omron CJ1W- ECT21 Operation Manual

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CIO Area Allocations

This section describes CIO area allocations for the EtherCAT Slave Unit.
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Overview of the Allocated CIO Area Words

Various kinds of data are stored in the allocated CIO Area words, which are identified by the offset from
the beginning word (n) allocated to each Unit.
The beginning word n is calculated by the following equation:
Beginning word n = CIO 1500 + (25 × unit number)
Offset
Bit
15
0 n
1 n+1
2 n+2
3 n+3
4 n+4
5 n+5
6
n+6
7 n+7
8
n+8
9 n+9
10
n+10
11 n+11
12
n+12
13
n+13
14
n+14
15
n+15
16
n+16
17
n+17
18
n+18
19
n+19
20
n+20
21
n+21
22
n+22
23
n+23
24
n+24
Precautions for Correct Use
The reserved words are regularly refreshed with all zeroes.
CJ-series EtherCAT Slave Units Operation Manual (W541)
8 7 0
(Reserved)
Unit Status 1
Unit Status 2
Slave Status 1
Slave Status 2
(Reserved)
3 Memory Allocations
Data direction
EtherCAT Slave Unit → CPU Unit
EtherCAT Slave Unit → CPU Unit
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