Rockwell Automation 20-COMM-R Remote I/O Adapter User Manual
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Glossary
G-5
20-COMM-R Remote I/O Adapter User Manual
Publication 20COMM-UM004D-EN-P
P
Ping
A message that is sent by a DPI product to its peripheral devices. They use
the ping to gather data about the product, including whether it can receive
messages and whether they can log in for control.
PowerFlex 7-Class (Architecture Class) Drives
The Allen-Bradley PowerFlex 7-Class family of drives supports DPI and, at
the time of publication, includes the PowerFlex 70, PowerFlex 700,
PowerFlex 700H, PowerFlex 700S, PowerFlex 700L, and PowerFlex 7000.
PowerFlex 750-Series (Architecture Class) Drives
The Allen-Bradley PowerFlex 750-Series of drives supports DPI and, at the
time of publication, includes the PowerFlex 753 and PowerFlex 755 drives.
R
Rack Address
Each device on a network must have a rack address that the controller it
intends to communicate with will recognize. A rack address and starting
module group are used to identify each device on a Remote I/O network.
Although the adapter supports a rack address of up to 77 Octal, not all
controllers recognize all of the addresses—and Remote I/O channels can
support only 32 devices. See your controller documentation for appropriate
addresses. Rack addresses use an octal numbering convention.
Rack Size
The rack size determines the number of 16-bit words of discrete I/O that the
Remote I/O adapter sends and receives. The Remote I/O adapter can be
configured as 1/4 rack (two 16-bit words) or 1/2 rack (four 16-bit words).
Additional I/O can be transferred using the Block Transfer I/O image.
Reference/Feedback
The Reference is used to send a setpoint (for example, speed, frequency, and
torque) to the drive. It consists of one word of output to the adapter from the
network. The size of the word (either a 16-bit word or 32-bit word) is
determined by the drive.
Feedback is used to monitor the speed of the drive. It consists of one word
of input from the adapter to the network. The size of the word (either a
16-bit word or 32-bit word) is determined by the drive.
RSLogix 5/500/5000 Software
RSLogix software is a tool for configuring and monitoring controllers to
communicate with connected devices. It is a 32-bit application that runs on
various Windows operating systems. Information about RSLogix software
can be found
.