Addressing Example-800 Series I/O Modules with Control Expert

Analog Module

The following example compares the 2 possible addressing modes. An 8-channel analog input module B875-200 with the following configuration data is used:

mounted in slot 5 of the RIO rack #3 located at drop 4 on bus 2
starting input address is 201 (input word %IW201)
end input address is 208 (input word %IW208)

To access the I/O data from the module you can use the following syntax:

Module data	Flat addressing	Topological addressing	Concept addressing
Channel 3	%IW203	%IW\2.4\3.5.3	300203

For comparison, the register addressing as used with concept is added in the last column.

Discrete Module

The following example compares the 2 possible addressing modes. An 32-channel discrete output module B838-032 with the following configuration data is used:

mounted in slot 4 of the RIO rack #3 located at drop 4 on bus 2
starting output address is 101 (output word %MW101)
end output address is 102 (output word %MW102)

To access the I/O data from the module you can use the following syntax:

Module data	Flat addressing	Topological addressing	Concept addressing
Output 5	%MW101.11	%QW\2.4\3.4.1.1.11	300101
Output17	%MW102.15	%QW\2.4\3.4.1.2.15	300102

For comparison, the register addressing as used with concept is added in the last column. As concept does not support direct addressing of a bit in a word, the bit extraction has to be performed in the user program.

The same configuration as before but data mapped into bits:

mounted in slot 4 of the RIO rack #3 located at drop 4 on bus 2
starting output address is 1 (output %M1)
end output address is 32 (output %M32)

To access the I/O data from the module you can use the following syntax:

Module data	Flat addressing	Topological addressing	Concept addressing
Output 5	%M5	%Q\2.4\3.4.5	000005
Output17	%M17	%Q\2.4\3.4.17	000017

For comparison, the register addressing as used with Concept is added in the last column.