Emerson 90-30

[Jtech]

I'm working with Emerson 90-30 on proficy machine edition and I'm trying to use a string variable to display words on a graphical panel in target 2 but withing the code itself on target one I cant seem to understand how the reference address works? can some one explain how string variables function and how to use them?

[Steve Bailey]

Strings are stored in %R memory. Each %R address is sixteen bits, so there are two characters per %R address. When you look at the %R memory in a reference table you can change the display so that it interprets the bits as ASCII characters rather than as a signed integer.

[Jtech]

The error I keep getting is the I/O memory reference address missing, can you use CPU memory and I/O memory together? or just one or the other?

[Steve Bailey]

The 90-30 does not support symbolic variables. It only supports address-based variables. You must assign an address to every variable you try to create. For a string your best choice will be %R addresses.