Setting the Base AddressInstalling the A/D Converter Card
Setting the Base Address
Tips:
The A/D converter card is no longer available from Dionex. However, as A/D converter cards may still be used in the field, refer to the corresponding installation instructions below.
This card is not supported under Windows Vista or later.
On PCs, up to 1024 I/O addresses are available (represented by 10 binary digits (bits)). Among these 1024 addresses, sufficient I/O addresses are available for the A/D converter card, even if your computer contains other cards. The card requires four consecutive I/O addresses. From 10 bits, only the higher eight bits must be coded via the switches. With the switch block, the first (= base address) of the four required addresses is set.
For information about how the eight switches are assigned to the binary digits, refer to the table below:
|
Digit |
Switch |
Default |
Meaning |
|
1 |
- |
- |
Not coded |
|
2 |
- |
- |
Not coded |
|
3 |
1 |
OFF |
4-digit |
|
4 |
2 |
ON |
8-digit |
|
5 |
3 |
OFF |
16-digit |
|
6 |
4 |
ON |
32-digit |
|
7 |
5 |
ON |
64-digit |
|
8 |
6 |
ON |
128-digit |
|
9 |
7 |
OFF |
256-digit |
|
10 |
8 |
OFF |
512-digit |
An open switch (OFF) corresponds to binary 1; a closed switch (ON) corresponds to binary 0. The default setting on the A/D card corresponds to the following base address:
4 + 16 + 256 + 512 = 788 (decimal) = 314H (hexadecimal).
If you use the default settings, the A/D converter card uses the I/O addresses 788, 789, 790, and 791 (decimal) or 314H, 315H, 316H, and 317H (hexadecimal) of the I/O address range of your PC. No other card installed in the PC must use these addresses. If another card, for example, a network interface card, already uses one of the addresses, a different address must be set. Try one of the following settings:
|
Base Address |
Switch |
|
hex: 300H (dec: 768) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
|
ON |
ON |
ON |
ON |
ON |
ON |
OFF |
OFF |
|
hex: 310H (dec: 784) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
|
ON |
ON |
OFF |
ON |
ON |
ON |
OFF |
OFF |
|
hex: 320H (dec: 800) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
|
ON |
ON |
ON |
OFF |
ON |
ON |
OFF |
OFF |
|
hex: 330H (dec: 816) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
|
ON |
ON |
OFF |
OFF |
ON |
ON |
OFF |
OFF |
|
hex: 340H (dec: 832) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
|
ON |
ON |
ON |
ON |
OFF |
ON |
OFF |
OFF |
|
hex: 360H (dec: 864) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
|
ON |
ON |
ON |
OFF |
OFF |
ON |
OFF |
OFF |
If your technical documents do not specify whether another card already uses the address set on the A/D converter card, use the default setting and follow the steps below.
Caution:
Usually, an I/O address conflict has no serious consequences. Nevertheless, a short circuit on the bus resulting from an address conflict may destroy components on one of the two cards. This is especially true for inexpensive or old cards.
After you have set the switches, install the card in your computer.
Tip:
Make a note of the current base I/O address setting of the A/D converter card, as it is required to configure the card driver in the Server Configuration program.