Allen-Bradley SLC 500 Manual page 244

Example 2:
In this configuration example, Input Words are set to 240, Output Words are set to 240 and Addressing
is set to Byte Boundaries.
When the OK button is clicked, the following Interbus-S DP Protocol dialog box will appear. The
valid address ranges are shown for all types of variables.
When byte addressing is selected, the valid address ranges appear in a different format in the Interbus-S
DP Protocol dialog box.
The number of words selected will determine the range limits for each variable type. The variable type
names are fixed and are displayed in a cell corresponding to the addressing type. For example, in the
following dialog box, the number of Input Words is set to 240. The variable name for Input Bits is I
and the range for 240 words is I0.0 to I479.7. Output Words are also set to 240, so the variable name
for bit Outputs is Q, with the range of Q0.0 to Q479.7.
A byte is 8 bits, therefore the addressing method is to use a period as the bit delimiter in the addressing
format. For example, I0.0 is bit 0 of Word 0, and I0.7 is bit 7 of Word 0.
138 • • • • Interbus-S
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