Micrologix 1500 1764-24AWA LSP Series B Cannot Use Floating Point?

[Craig Chamberlin 1]

I am attempting to transpose an old Micrologix 1200 program to a newer Micrologix 1500 processor. I was surprised to find out there was no F8 data file, nor can I create one through the menu system. There must be a way to get floating point accuracy with the Micrologix 1500 I have. I must be doing something stupid. Any help would be much appreciated. Craig Chamberlin Precision Electric Inc.

[dmargineau 6]

The Micrologix 1500 System (1764-LSP) supports the creation of Floating Point data files, each of which can contain up to 256 IEEE-754 floating point data elements. Make sure you are running the latest revision of RSLogix 500 and the project lists the Micrologix 1500 as the Project Controller. Of course you will have to create the Floating Point data file while OFFLINE and then download it to the processor.

[Mickey 71]

It does support long data types ( 32 bit). You can then use implied decimal point. Or just an integer if the numbers are not to big and an implied decimal point with them. Just document your program well so anybody looking at it knows there is a decimal point in there somewhere. Edited 15 Dec 2010 by Mickey

[Ken Roach 194]

The Series A and Series B operating systems for the MicroLogix 1500 don't support Floating Point. Select a Series C controller and you'll see the F8 file. Series C firmware started with FRN6 in September of 2001. All MicroLogix 1500 controllers can be upgraded to the newest firmware; the firmware is free of charge and can be downloaded from the AB.com/micrologix website. Edited 16 Dec 2010 by Ken Roach