Flat Addressing—800 Series I/O Modules
(Original Document)
About us
Introduction
800 series I/O modules follow a system of flat address mapping in Control Expert. To work properly. each module requires a determinate number of bits and/or words. The IEC addressing system is equivalent to the 984LL register addressing. Use the following assignments:
The following table shows the relationship between 984LL notation and IEC notation.
Outputs and Inputs
984LL Notation
Register Addresses
IEC Notation
System Bits and Words
Memory Addresses
I/O Addresses
output
0x
System Bit
%Mx
%Qx
input
1x
System Bit
%Ix
%Ix
input
3x
System Word
%IWx
%IWx
output
4x
System Word
%MWx
%QWx
To access the I/O data of a module,
Step
Action
1
Enter the address range in the configuration screen.
Examples
The following examples show the relationship between 984LL register addressing and IEC addressing:
000001 is now %M1
100101 is now %I101
301024 is now %IW1024
400010 is now %MW10