PARKER 6055 LNET and Controllogix

[ronny_resistor]

So my distributor convinced me to try this card out instead of the Ethernet I/P card this is for the 690 and 590 drives that allow for communications. This works great except....

So initially you set up the drive with 16 words and then set up the processor for generic Ethenet I/P and the Inputs Instance is 100 and there are 16 words at 16 Bits each.

This seems to work. So i decided to change the number of words to 8 in the drive card and in the processor i matched this. No exclamation marks everything looks good. then I set my status word into word 0 of the drive and this should appear in word 1 in the processor. It doesnt it stays blank 0 nil.

So I then made the drive say it had 9 words and shifted all the words up by 1 and in the PLC i said you have 9 words. The Status word is now in word 2 and word 1 is not defined in the drive and the status word now shows up in word 2 of the processor, IS the first word reserved ?? the output (PLC to drive does not show this behavior, Output = Instance 150)

I was trying to reduce the communications from 16 words to 8 words figuring that this speeds up the comms by 50% maybe I am wrong in thinking this way. Anyone ??

 

[Ken Roach]

The issue is probably with the 4-byte status header on "Generic Ethernet Device" Input data connections. I can never reliably tell from third parties if their .DATA connection includes the status header or not.

The amount of time on the wire for 8 bytes vs. 16 bytes is dwarfed by the overhead and the interface delay between the option card and the drive. There is no practical performance difference, so I strongly recommend sticking with the default configuration.

 

[thingstodo]

The issue is probably with the 4-byte status header on "Generic Ethernet Device" Input data connections. I can never reliably tell from third parties if their .DATA connection includes the status header or not.

The amount of time on the wire for 8 bytes vs. 16 bytes is dwarfed by the overhead and the interface delay between the option card and the drive. There is no practical performance difference, so I strongly recommend sticking with the default configuration.

+1 ... there is no advantage to be measured. It works with 16 - leave it at 16. You have more important stuff to work on!

 

[ronny_resistor]

Thanks for participating in my question in regards to this PLC and Ethernet drive card. I have decided to keep this simple and just not use the balance of the 16 registers. Just wish someone would have created some better documentation for a card.The issue stems that Parker SSD drives are now no longer being manufactured in America or the UK.