A-1-2 Differences In Access Methods From A User Program - Omron CJ1W-CT021 Operation Manuals

Appendices
A-1-2 Differences in Access Methods from a User Program
With the NJ Series, device variables for CJ-series Unit are used for the Counter Unit functions.
The following tables show how the words and bits of CJ-series I/O memory or the NJ-series memory
used for CJ-series Unit correspond to the NJ-series device variables for CJ-series Unit.
Start address of special I/O Unit area: n = 2000 words + Unit number × 10 (Unit number: 0 to 92)
Start address of the special I/O Unit DM area: m = D20000 + Unit number × 100 (Unit number: 0 to 92)
MACH
No.
1
X10
The relay number and DM number occupied by the High-speed Counter Unit are set by the
Unit number switch on the front panel of the Unit.
0
X10
One High-speed Counter Unit occupies allocation areas of four Unit numbers.
0
1
2
3
4
5
6
7
8
9
10
n
92
93
94
95
Additional Information
• If two or more Special I/O Units are set to an identical Unit number or if one Special I/O Unit is
set to areas of plural Unit numbers, the CPU Unit has a major fault level error, a duplicated Unit
number error, and stops operation.
• After correcting the Unit number setting, cycle the power to the Controller.
• One High-speed Counter Unit occupies allocation areas of four Unit numbers. Be sure that no
Unit numbers are duplicated.
To avoid duplication, when you set a High-speed Counter Unit to the Unit number "n", set the
next Special I/O Unit to the Unit number "n + 4".
A-4
CIO Area words allocated to
Unit Number
0 2000 to 2039 words
1 2010 to 2049 words
2 2020 to 2059 words
3 2030 to 2069 words
4 2040 to 2079 words
5 2050 to 2089 words
6 2060 to 2099 words
7 2070 to 2109 words
8 2080 to 2119 words
9 2090 to 2129 words
10 2100 to 2139 words
2000 + (n × 10) to
n
2000 + (n × 10) + 39
92 2920 to 2959 words
(Cannot be set) ---
(Cannot be set) ---
(Cannot be set) ---
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
DM Area words allocated to
Special I/O Unit
D20000 to D20399 words
D20100 to D20499 words
D20200 to D20599 words
D20300 to D20699 words
D20400 to D20799 words
D20500 to D20899 words
D20600 to D20999 words
D20700 to D21009 words
D20800 to D21199 words
D20900 to D21299 words
D21000 to D21399 words
D20000 + (n × 100) to
D20000 + (n × 100) + 399
D29200 to D29599 words
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Special I/O Unit