Rockwell Automation 20-750-PBUS Profibus DPV1 Option Module User Manual
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Rockwell Automation Publication 750COM-UM004B-EN-P - September 2012
Glossary
Profibus Network
A Profibus network uses RS485 to connect devices such as controllers, drives,
motor starters and other equipment in automation systems. A Profibus network
can support a maximum of 126 devices. Each device is assigned a unique node
address and transmits data on the network at the same data rate. A cable is used to
connect devices on the network. It contains the bus signal. Devices can be
connected to the network in a daisy-chain connection.
ProSoft Configuration Builder
(PCB) Software
A software tool used to configure the MVI56-PDPMV1 Profibus DPV1 master
communication module. The newest version of ProSoft Configuration Builder
software is available from
.
Reference/Feedback
The Reference is used to send a setpoint (for example, speed, frequency, torque,
and so forth) to the drive. It consists of one 32-bit word of output to the option
module from the network.
Feedback is used to monitor the speed of the drive. It consists of one 32-bit word
of input from the option module to the network.
RSLogix 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 at
.
SI (Serial Interface)
A next generation communication interface used by various Allen-Bradley drives,
such as PowerFlex 750-Series drives.
Status Indicators
LEDs that are used to report the status of the option module, network, and drive.
They are on the option module and can be viewed when the drive is powered and
its cover is removed.
Stop Action
When communication is disrupted (for example, a cable is disconnected), the
option module and drive can respond with a stop action. A stop action results in
the drive receiving zero as values for Logic Command, Reference, and Datalink
data. If the drive was running and using the Reference from the option module, it
will stay running but at zero Reference.
UDDT (User-Defined Data Type)
A structure data type that you define during the development of an application
(for example, to convert 32-bit REAL parameter data for written and read values
to correctly display them in human readable format).
Update
The process of updating firmware in a device. The option module can be updated
using various Allen-Bradley software tools. See
for more information.
Zero Data
When communication is are disrupted (for example, a cable is disconnected), the
option module and drive can respond with zero data. Zero data results in the
drive receiving zero as values for Logic Command, Reference, and Datalink data.
If the drive was running and using the Reference from the option module, it will
stay running but at zero Reference.