72 Rockwell Automation Publication 750COM-UM009A-EN-P - May 2017
Chapter 3 Configuring the Drive in a Logix System
The latest drive AOPs ship with each release of Logix Designer and are also
available for free download at:
http://compatibility.rockwellautomation.com/Pages/home.aspx
ADC works with all versions of the PowerFlex 755T drives when the
Logix I/O connection is made through the embedded Ethernet port.
Firmware updates are available for free download at:
http://compatibility.rockwellautomation.com/Pages/home.aspx
If you do not have the minimum levels of software and hardware, the ADC
feature is not available (ADC icon is missing or appears dimmed).
Drive configuration settings are stored inside the ACD project file. With
ADC enabled, the Logix controller automatically downloads the configuration
settings for a particular drive port if it detects that there is a configuration
signature mismatch with a port.
A configuration signature is a globally unique ID number. The Logix
controller uses the number to perform a quick compare to determine if a
download is needed. If the signatures match, no download is needed. If an
option module or entire drive is replaced, the configuration signature for the
respective port does not match and a download occurs to the port.
TIP To identify the drive AOP version you are using, open the AOP, click the icon
in the upper left corner of the window and select “About Module Profile”.
ATTENTION: Logix holds the Master copy of the drive configuration.
When ADC is enabled, ADC is triggered any time the Logix controller detects
a configuration signature mismatch when establishing an EtherNet/IP
network I/O connection.
• The use of other configuration tools, such as a HIM or CCW software must be
minimized and restricted to monitor-only operation. Any configuration
changes made by these tools will cause a configuration signature mismatch
the next time the Logix controller connects to the device. ADC writes over
any configuration changes made by the other tools. Consider using the Write
Mask function (drive 0:230 - [Write Mask Cfg]). The function stops tools
that are connected to ports other than the built-in EtherNet/IP port in a
PowerFlex 755T drive from writing to the drive. Any drive configuration
changes must be made with the Add-on Profile (AOP).
• The use of Explicit Messaging to perform parameter writes in the Logix
program must be limited to RAM memory by setting the proper Attribute in
the MSG instruction. Any writes to parameter nonvolatile storage (NVS) will
clear the configuration signature and cause a mismatch the next time the
Logix controller connects to the device. This triggers ADC, which writes over
any configuration changes that were previously made.
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