Modbus - Working with floating points

Is there a way to address floating point variables with Modbus/TCP?

FYI: Using Quantum 434 12U (Unity Pro XL 3)

Yes, you read two register for every float. My customers do this all the time.

normally I send as integer, and scale later.
For example send a temperature as "304" and then divide by 10 to get "30.4"

They are addressed as %MF, be careful though as they use the same address space as %MW

You also need to make sure you are reading them the right way round, if you are addressing them from SCADA or and HMI there is a usually setting for which way round the words are

Edit: so jst looked at your user name and question again and am putting 2 and 2 togetther and suspecting you are addressing from SCADA, in that case you just declare them as REAL and %MW in the SCADA app (thats if it allows native addressing which Citect does if you use Modnet30) or as its modbus address and the driver will take the n and n+1 address and know its a REAL

Great, that worked!
Thanks

tragically1969 said:

declare them as REAL and (SNIP) the driver will take the n and n+1 address and know its a REAL

Click to expand...

Is thet term "Real" a synonym for "floating point"? Are the two considered to be the same thing?

Dan

Yes REAL, Floating Point, both the same thing.