Allen-Bradley PowerFlex 755T User Manual page 82

Chapter 3 Configuring the Drive in a Logix System
84
Figure 13 shows an example Logix program that monitors the Ethernet
connection status to the PowerFlex drive and checks for a Configuration
Signature in Port 0 in the drive. If the connection is running (4000 Hex =
16384 Dec), a timer is used to read the Configuration Signature periodically in
Port 0 in the drive. If there is no Configuration Signature present, all read data
are zeros.
Figure 13 - Example of the Logix Program
Additional MSG instructions would be required to read the Configuration
Signatures in the other ports.
Figure 13 is an example only and is optional. The GSV is good way to check
Ethernet connection status for program use and to display status on an HIM. A
Running connection to control the drive is required. If ADC is enabled, the
Running status confirms a successful ADC download. The status information
that is displayed is the same as when online with the AOP.
Reading the Configuration Signature is not typical, but could be used to detect
and annunciate that a configuration change was made. When a configuration
change is made, ADC triggers and downloads on the next I/O connection. A
drive may not power cycle or reset for a considerable time, it could be days or
months before an I/O connection is dropped and re-established to allow ADC
to occur. When ADC does occur, it overwrites any changes that were made
outside of the drive AOP.
Rockwell Automation Publication 750COM-UM009A-EN-P - May 2017