3-4
Section
Switch Settings
25
3-4
Switch Settings
This section explains how to set the various switches on the Ethernet Unit.
3-4-1 Setting the Unit Number
The unit number is used to identify individual CPU Bus Units when more than
one CPU Bus Unit is mounted to the same PC. Use a small screwdriver to make
the setting, taking care not to damage the rotary switch. The unit number is facto-
ry-set to 0.
Setting range:
0 to F
Note
1. Turn OFF the power supply before setting the unit number.
2. If the unit number is being set for the first time or changed, then an I/O table
must be created for the PC.
With CS1-series PCs, words are automatically allocated in the CIO Area and the
DM Area. The Ethernet Unit uses these words for receiving control data from the
CPU Unit and for notifying the CPU Unit of Ethernet Unit and communications
status. The word addresses in the allocated areas for the CPU Bus Unit are im-
portant in creating the user program for using the Ethernet Unit, so be careful to
take them into account when setting the unit number.
The following table shows the areas allocated for the CPU Bus Unit by unit num-
ber. This table only shows the correspondences between unit numbers and the
areas allocated for the CPU Bus Unit. For more details, refer to Section 4 System
Setup and Allocated Areas.
CIO Area Allocations
Unit No.
(decimal)
Allocated words
Unit No.
(decimal)
Allocated words
0 (0)
CIO 1500 to CIO 1524
8 (8)
CIO 1700 to CIO 1724
1 (1)
CIO 1525 to CIO 1549
9 (9)
CIO 1725 to CIO 1749
2 (2)
CIO 1550 to CIO 1574
A (10)
CIO 1750 to CIO 1774
3 (3)
CIO 1575 to CIO 1599
B (11)
CIO 1775 to CIO 1799
4 (4)
CIO 1600 to CIO 1624
C (12)
CIO 1800 to CIO 1824
5 (5)
CIO 1625 to CIO 1649
D (13)
CIO 1825 to CIO 1849
6 (6)
CIO 1650 to CIO 1674
E (14)
CIO 1850 to CIO 1874
7 (7)
CIO 1675 to CIO 1699
F (15)
CIO 1875 to CIO 1899
DM Area Allocations
Unit No.
(decimal)
Allocated words
Unit No.
(decimal)
Allocated words
0 (0)
D30000 to D30099
8 (8)
D30800 to D30899
1 (1)
D30100 to D30199
9 (9)
D30900 to D30999
2 (2)
D30200 to D30299
A (10)
D31000 to D31099
3 (3)
D30300 to D30399
B (11)
D31100 to D31199
4 (4)
D30400 to D30499
C (12)
D31200 to D31299
5 (5)
D30500 to D30599
D (13)
D31300 to D31399
6 (6)
D30600 to D30699
E (14)
D31400 to D31499
7 (7)
D30700 to D30799
F (15)
D31500 to D31599
3-4-2 Setting the Node Number
With the FINS communications service, when there are multiple Ethernet Units
connected to the Ethernet network, the Ethernet Units are identified by node
Unit Number and CPU
Bus Unit Allocations
