Converting 2 words (IEEE 754 format) to a real number

vcorona

Hi,

So I'm using a Modbus TCP client to read some registers from the server. I need to convert the value of two of this registers (2 words), that are in the IEEE 754 format, to a single real number. There's a library for PCW6 called SYS_PLC that has a function block for this (SYS_IEEE_ToReal). I don't know how to do this on PLCNext Engineer. Any help will be very much appreciated.

 

 

Martin [PLCnext Technology Team]

Hello,

Please see this thread:

https://www.plcnext-community.net/index.php?option=com_easydiscuss&view=post&id=1272&Itemid=221&lang=en#reply-1343

The basic steps might be:

1. Copy the two WORD values to the LSW and MSW in a DWORD variable.
2. Use the TO_REAL function to convert the DWORD to a REAL.

- Martin.

Martin [PLCnext Technology Team]

Here's an example, to demonstrate:

vcorona

Thank you very much Martin. It works like a charm.