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Memory Areas
Appendix B
DM Area: CPU Bus Unit Area
The CPU Bus Unit Area (data memory) is allocated to CPU Bus Units according to the unit numbers assigned
to them, as shown below. Each Unit is allocated 100 words, of which 10 words are used. In the Controller Link
Unit this area is called the DM Area.
Software Switches (D 100
×
Unit No.) (See pages 93, 186, 193, 255)
Unit no.
Words
Unit no.
Words
0
DM2000 to
DM2009
8
DM2800 to
DM2809
1
DM2100 to
DM2109
9
DM2900 to
DM2909
2
DM2200 to
DM2209
10
DM3000 to
DM3009
3
DM2300 to
DM2309
11
DM3100 to
DM3109
4
DM2400 to
DM2409
12
DM3200 to
DM3209
5
DM2500 to
DM2509
13
DM3300 to
DM3309
6
DM2600 to
DM2609
14
DM3400 to
DM3409
7
DM2700 to
DM2709
15
DM3500 to
DM3509
Data link mode
Set to 01 for automatic setting.
(00 is for manual setting. Other values are invalid.)
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
EEPROM Clear Bit* 0: Do not clear EEPROM
1: Clear EEPROM
Polling unit/polled unit bit
0: Polling unit
1: Polled unit
0
Data link Start Bit
Start: Changed from OFF to ON or set to ON
when power is turned on
Stop: Changed from ON to OFF
*Clears the network parameters, data link tables,
and routing tables stored in EEPROM in the PC's
CPU Unit.
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