Rockwell Automation 1794-VHSC 1794 FLEX I/O Very High Speed Counter Module User Manual - Manual (Page 23)

Rockwell Automation Publication 1794-UM010D-EN-E - July 2013 15
Overview of the Very High Speed Counter Module
FLEX I/O Communication Process
1. The adapter transfers your configuration data and commands to the
module.
2. External devices generate input signals that are transmitted to the module.
3. The module converts these signals into binary format, and stores these
values and controls their output until the adapter requests their transfer.
4. The adapter transfers the data over the FlexBus.
5. The adapter and module determine that the transfer was made without
error and inputs values are within a specified range.
6. EtherNet/IP transfers the data to the programmable controller data table.
Chapter Summary In this chapter you learned how your module operates, and how your module
communicates with the programmable controller.
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VERY HIGH SPEED COUNTER MODULE
1
1794-VHSC Allen-Bradley
The adapter transfers your configuration
data to the module.
The adapter transfers the
data over the FlexBus.
The adapter and module determine
that the transfer was made without
error and input values are within a
specified range.
EtherNet/IP transfers the data to the
programmable controller data table.
The module converts
frequency signals into
binary format and stores
these values until the
adapter requests their
transfer.
External devices transmit
frequency signals to the module.
FlexBus
45896