I have connected a slave device to the PR200. I can read INT variables but I am having problems with REAL variables. I want to show a value on the display but it shows a different value that doesn’t make sense. What should I check?

To read and show REAL variables, it is important to know the endianness of the registers and bytes, i.e. register and byte ordering. It can be either big-endian or little-endian format.

If you use the big-endian format, the register or the byte that contains the most significant bit is sent first, followed in a decreasing significance order. The little-endian format has a reversed order.

You can determine the register and byte order using respective checkboxes on the Device Configuration dialog box (Device > Device settings):