Example ladder logic program, Functions of the example programs, Logic command/status words – Rockwell Automation 25-COMM-D PowerFlex 525 DeviceNet Adapter User Manual
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Rockwell Automation Publication 520COM-UM002A-EN-E - April 2013
Chapter 5
Using the I/O
–
Host parameters C165...C168 [Opt Data Out 1...4]
•
When an I/O connection that includes Datalinks is active, those Datalinks
being used are locked and cannot be changed until that I/O connection
becomes idle or inactive.
•
When you use a Datalink to change a value, the value is not written to the
Non-Volatile Storage (NVS). The value is stored in volatile memory and
lost when the drive loses power. Thus, use Datalinks when you need to
change a value of a parameter frequently.
Datalinks for PowerFlex 525 drive peripherals (embedded EtherNet/IP adapter
and option modules such as a communication module) are locked when the
peripheral has an I/O connection with a controller. When a controller has an I/O
connection to the drive, the drive does not allow a reset to defaults, configuration
download or anything else that could change the makeup of the I/O connection
in a running system. The I/O connection with the controller must first be
disabled to allow changes to the respective Datalinks.
Depending on the controller being used, the I/O connection can be disabled by:
•
Inhibiting the module in RSLogix 5000/Logix Designer
•
Putting the controller in Program mode
•
Placing the scanner in idle mode
•
Disconnecting the drive from the network
Example Ladder Logic
Program
The example ladder logic programs in the sections of this chapter are intended for
PowerFlex 525 drives.
Functions of the Example Programs
The example programs enable you to:
•
Receive Logic Status information from the drive.
•
Send a Logic Command to control the drive (start, stop).
•
Send a Reference to the drive and receive Feedback from the drive.
•
Send/receive Datalink data to/from the drive.
Logic Command/Status Words
These examples use the Logic Command word and Logic Status word for
PowerFlex 525 drives. See
to view details.
IMPORTANT
A reset is always required after configuring Datalinks so that the
changes take effect.