Allen-Bradley Compact I/O 1769-ADN DeviceNet, User Manual

Page: 83 / 204

Publication 1769-UM001B-EN-P - October 2002
Configuring Your Compact I/O Series B DeviceNet Adapter 4-7
•
The Series B adapter supports a maximum of 196-254 words
(392-508 bytes) of output data distributed across all of the
modules, depending on the number of modules present in the
system.
Use the following equation to calculate the maximum number of
output words:
Maximum Output Words = 256 - (Number of Output Modules) x
2
Where the "Number of Output Modules" is the number of output
modules configured to have 1 or more words of output data.
The maximum number of output words is distributed across all
of the output modules.
•
The Series B adapter supports a maximum of 254 words (508
bytes) of configuration data to each individual module, for a
total capacity of 7,620 words (15,240 bytes). The configuration
data is stored within 1 (64K) sector of the external flash part,
enabling the maximum for each module to be supported,
regardless of the number of modules.
•
An end cap/terminator must be on the last I/O bank.
Allen-Bradley