Powerflex 525 explicit start/stop commands

[DMG 0]

Hello, I'm using a BRX PLC to control some Powerflex 525 drives, and I'm struggling with sending the start and stop commands using explicit messaging. All I can seem to find is information regarding the N tables in the drive, but nothing about the class, instance, and attribute for the Ethernet/IP commands. Is anyone able to point me in the right direction?

The Knowledge database has an instruction of setting and getting parameters ( https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/721115 ), but I'm having trouble with identifying the start/stop locations.

Another topic ( https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/52205 ) seems to provide a walkthrough for sending the messages, but again I'm failing to make the connection between the N tables and class/instance/attribute for my BRX PLC.

[pcmccartney1 141]

Try this technote.  https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/721115/loc/en_US

I think this technote also indicates that you should not do explicit messaging for the command word.  I think you want to find a way of doing implicit messaging to the drive for the command word.  Explicit is find for reading parameters and even writing some parameters that do not require constant updates.

The one thing I remember for most of the PowerFlex drives and the command work via implicit (not explicit) messaging was that the stop signal needed to be in the rung above the start signal.  In other words, the Stop signal must turn off before the start signal turned on.  I'm unsure how this would be affected with the use of explicit, since you are writing the entire command word in one shot.

 

Here's another technote worthy of reading.  https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/52205/loc/en_US

[DMG 0]

Thanks, but unfortunately the PLC I'm using is not capable of doing implicit messaging.