Auto-assign, Latch, and Specify exact address?

[devo.xx 0]

I am having some difficulty coming up with a good solution to my problem... What I have is a series of SDTs that hold all of my equipment information: Pump Timers, Pressure SetPoints, etc. In order for me to access them on my E-Terminal, I need to know exactly what D-device each variable is stored in. In order to do this, I created my Variables as VAR_GLOBAL, then populated down in the Device(Detail Setting). The problem I'm having is that I cannot set my LATCH(1) range across "Device/Label Automatic Assign" unless they are created as VAR_RETAIN. But I can only set VAR_RETAIN as Local Labels, which won't let me specify the D-device, and thus I cannot use them in my HMI. My question boils down to this: I need to Latch my Setpoints so when the PLC goes cold, it doesn't reset everything. I need to access my D-devices on my HMI. I need to keep using my SDTs and "Device/Labels" to make variable tracking and code debugging easier on my maintenance staff. Is there any GOOD way of doing this?

[kaare_t 155]

PLC? ProgSW? ProgLanguage?

[Crossbow 297]

Since you are specifying addresses for each object, you don't need VAR_RETAIN. Simply assign one of the addresses which is latched by the battery.