GE Fanuc Addressing??

[Ollie]

I'm working with GE Fanuc PLC's for the first time. I'm attempting to take an older GE Fanuc system, and update the HMI that it communicates with which is currently CIMPLICITY Ver. 3.0 Build 300 and I'm upgrading to NI Lookout V5.0.


The I/O Map that was provided to me has and Address scheme similar to this:


ADDR: %R105 ADDR_OFFSET:17


I'm not familiar with this ADDR_OFFSET? Can you describe to me what it is and how I would translate it into something I can use in my software? At first I thought this was a particular bit in that memory location, but the information that I have tells me the R1-R16383 are 16 bit holding registers encoded as unsigned binary integers ranging from 0 - 65535. If this is the case, then the only logical values
in the ADDR_OFFSET column could be 0-15."

[steven@ni]

The GE Fanuc's "R" registers are 16 bit holding registers.

They should be referenced with the address R1-R2048.

To what I/O map are you referring?

In Lookout, the datamembers only offer the R1-R2048 without any address offset.

For more information on the addressing, you may need to contact GE.

[Ollie]

Steven,

Thx for your reply. The I/O map that I received is from the customer. As stated, this is an older system being run by Cimplicity that I'm upgrading to Lookout V 5.0. The I/O map is directly out of this older software.

I have been in contact with GE, but since I'm "Replacing" their software, they haven�t been to forth coming with information.

My hope was to have someone with GE FANUC experience be able to tell me what this is. And how to address it.

[Khalid]

Could this offset be in Hex? It's unusual but nothing else makes sense.

May be you can try reading (in the existing software) a particular register first as a 16-bit integer and then with the "offset" assuming it's the bit position and check if this is the case.

Finally, you may want to post this on a PLCs/Control forum. One such good and active forum is at:
http://www.control.com/

(the site was unusually slow today when I checked)

Rgds,

Khalid

[Ollie]

Khalid,

It's not Hex and it's not Octal, I thought of this as well, but some of the offsets are 8 and 9.

F.Y.I.

Yesterday I finally spoke to someone a GE that told me that this OFFSET was impossible to have. The offset is a decimal number. And the old system should have never worked?!?!?! That's all the help they could provide me.

So my next post will be, "How do you tell a customer that has had a working system for 9 years, that thier system should have never worked?"