Rockwell Automation 1784-KTCS ControlNET Scanner Installation Instructions User Manual
Page 9
ControlNet Scanner Card
9
Publication 1784-5.35 – April 1999
Selecting the Base I/O Space Address Location
The host addresses I/O devices on the card by using their I/O space addresses.
The host addresses individual devices through registers that have addresses
based on the I/O space base address. The registers are 2 bytes (1 word) long.
The card comes set to base I/O space address 220. You may find that this
selected address has been allocated to other interface cards or expansion memory
cards you have installed in your computer system. If this occurs, change the
switch settings to an open address.
Important:
When selecting configuration settings, check for conflicts with
other interface cards and system memory. If there is a conflict, the
system will not operate properly.
To select a new base I/O space address:
1. Pick an available address from the I/O map area of the host computer’s
memory.
Be sure to choose a block that is 2 bytes long.
Important:
Each card requires 2 bytes of I/O space.
2. Use Worksheet D to select a new base I/O space address for the card
(i.e., to determine the switch settings for the new address).
Follow this guide to properly set your switches:
up (1)
down (0)
1 2 3 4
MSB
LSB
Front View
up (1)
down (0)
Side View
Front View
S3
3. Fill in Worksheet E after you have determined your switch settings.