M-Var set to Real

[terrydeltasigmacorp.com]

If is set a M-Var directly to a real value, does Power PMAC convert it to a 32-bit floating point value. I need to send a 32-bit floating point value out to a piece of equipment using a ACC-14E. If I can set a M-Var equal to the real value, I can then parse it out into 4 8-bit values to write to the ACC-14E.

 

Thanks

[curtwilson]

I think you will need a small trick here. First, you will write your value to a holding register in the user shared memory buffer as a 32-bit floating-point value. For example,

 

Sys.Fdata[100] = MyValue

 

Then you can access the 4 bytes in this representation individually with Cdata elements:

 

Sys.Cdata[400]

Sys.Cdata[401]

Sys.Cdata[402]

Sys.Cdata[403]

 

Note that since there are 4 Cdata elements per Fdata element, the indices are 4 times greater.

 

So these can simply be copied a byte at a time to the 4 byte registers of your ACC-14E:

 

Acc14E.DataReg[0] = Sys.Cdata[400]

etc.