Rockwell Automation 1794-ID2 U.MNL INCREMENTAL ENCODER - Manual (Page 15)

1–3 Overview of the Incremental Encoder Module
Publication 1794ĆUM015B-EN-P - May 2001
ADAPTER
ACTIVE FAULT
LOCAL
FAULT
24VDC
POWER SUPPLY
RIO ADAPTER
1794ĆASB
AllenĆBradley
1
The adapter transfers your configuration data
to the module using a BTW.
Flexbus
External devices transmit
frequency signals to the module.
2
The module converts
frequency signals into integer
format and stores these values
until the adapter requests their
transfer.
3
Your ladder program instructs the
adapter to perform a BTR of the values
and stores them in a data table.
4
The adapter and module determine
that the transfer was made without error
and input values are within specified
range.
5
Your ladder program can use and/or move the data (if valid)
before it is written over by the transfer of new data in a
subsequent transfer.
6
Your ladder program performs BTWs to the module when you power
it up, and any time you wish to reconfigure the module.
7
OK
2 CH INCREMENTAL ENCODER
1
1794-ID2 AllenĆBradley
You can use the 1794–ID2 module in the power management,
automotive, food and beverage, and oil and gas industries for various
flow and/or turbine metering applications. Some sample
applications include:
•
turbine shaft speed monitoring
•
automotive paint booths
•
brewery flow monitoring
•
petrochemical flow and custody transfer
The incremental encoder module has 2 identical input channels.
Each of the input channels may accept these input signals:
•
A+ and A–
•
B+ and B–
•
Z+ and Z–
•
G+ and G–
The pulse inputs can accept frequencies up to 100KHz. The module
accepts and returns binary data.
Typical Applications
Input Capabilities