SLC 500 LEQ floating point

DerekB707 · May 12, 2014

Hi,

Have a quick question on a slc500. Tying to create an alarm setpoint using a LEQ; It will not allow me to assemble the rung using a floating point in both the source A & B. Can a float point be used like this? I am trying to get decimal point resolution.

Thanks,
Derek

DerekB707 · May 12, 2014

Nevermind. Not sure why, but when I placed a value in the float point in source B, it allowed me to assemble.

nehpets · May 13, 2014

You will find that the 'F' file is floating point and the 'N' file is an integer these are different data types and cannot be compared(AFAIK)in this way, they need to be same data types as you have found.

Steve

daba · May 13, 2014

nehpets said:
You will find that the 'F' file is floating point and the 'N' file is an integer these are different data types and cannot be compared(AFAIK)in this way, they need to be same data types as you have found.

Steve

Incorrect, all math instructions accept mixed data-types for their operands. The processor will convert all of them to the highest-order data-type for processing. If it is a math "do" instruction, it will then convert and/or round the result to store in the destination.

DerekB707 · May 13, 2014

daba said:
Incorrect, all math instructions accept mixed data-types for their operands. The processor will convert all of them to the highest-order data-type for processing. If it is a math "do" instruction, it will then convert and/or round the result to store in the destination.

Yes, I was allowed to assemble a integer compared to a float point, was just having difficulty assembling the edit with a '0' in the register of the float point for some reason, once I placed a real value in the register, I was able to assemble.

SLC 500 LEQ floating point

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