100
Exchanging Data with the CPU Unit Section 3-5
3-5-2 Unit Number Setting
The words in the Special I/O Unit Areas in the CIO Area and DM Area that are
allocated to each Analog Input Unit are determined by the unit number
switches on the front panel of the Unit.
Note If two or more Special I/O Units are assigned the same unit number, a “UNIT
No. DPL ERR” error (in the Programming Console) will be generated (A40113
will turn ON) and the PLC will not operate.
3-5-3 Special I/O Unit Restart Bits
To restart the Unit after changing the contents of the DM Area or correcting an
error, cycle the power supply to the PLC or turn ON the Special I/O Unit
Restart Bit.
Note Replace the Unit if the error is not cleared even though the power supply is
cycled or the Restart Bit is turned ON.
Switch
setting
Unit
number
Words allocated in
Special I/O Unit Area in
CIO Area
Words allocated in Special I/
O Unit Area in DM Area
0 Unit #0 CIO 2000 to CIO 2009 D20000 to D20099
1 Unit #1 CIO 2010 to CIO 2019 D20100 to D20199
2 Unit #2 CIO 2020 to CIO 2029 D20200 to D20299
3 Unit #3 CIO 2030 to CIO 2039 D20300 to D20399
4 Unit #4 CIO 2040 to CIO 2049 D20400 to D20499
5 Unit #5 CIO 2050 to CIO 2059 D20500 to D20599
6 Unit #6 CIO 2060 to CIO 2069 D20600 to D20699
7 Unit #7 CIO 2070 to CIO 2079 D20700 to D20799
8 Unit #8 CIO 2080 to CIO 2089 D20800 to D20899
9 Unit #9 CIO 2090 to CIO 2099 D20900 to D20999
10 Unit #10 CIO 2100 to CIO 2109 D21000 to D21099
to to to to
n Unit #n CIO 2000 + (n × 10) to
CIO 2000 + (n × 10) + 9
D20000 + (n × 100) to
D20000 + (n × 100) + 99
to to to to
95 Unit #95 CIO 2950 to CIO 2959 D29500 to D29599
MACH
No
.
10
1
10
0
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
Special I/O Unit
Area word
address
Function
A50200 Unit No. 0 Restart Bit Restarts the Unit when turned
ON and then OFF again.
A50201 Unit No. 1 Restart Bit
to to
A50215 Unit No. 15 Restart Bit
A50300 Unit No. 16 Restart Bit
to to
A50715 Unit No. 95 Restart Bit
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