adccommunitymod (AutomationDirect) asked a question.
Created Date: April 22,2002
Created By: rsmith
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I am storing some presets in program memory to avoid dependence on battery back-up of n.v. memory. I can MOVMC values from the DLBL into V memory, but after modification cannot get the MOVMC command to put the changed values back in the DLBL even though I am following the manual exactly (I believe). Is something missing from the manual instructions, like needing a PD (as for PRINT). I have verified the changes in V mem with the memory editor, and they affect the program as desired while the PLC remains on. But the 'save from PLC ' button should go active so I can verify on my screen that the DLBL has been changed and save it to disk as modified.
Created Date: April 22,2002
Created by: rsmith
I am storing some presets in program memory to avoid dependence on battery back-up of n.v. memory. I can MOVMC values from the DLBL into V memory, but after modification cannot get the MOVMC command to put the changed values back in the DLBL even though I am following the manual exactly (I believe). Is something missing from the manual instructions, like needing a PD (as for PRINT).
I have verified the changes in V mem with the memory editor, and they affect the program as desired while the PLC remains on. But the 'save from PLC ' button should go active so I can verify on my screen that the DLBL has been changed and save it to disk as modified.
Created Date: April 22,2002
Created by: rsmith
Oops. Should have said I'm using a DL-250 PLC, firmware version 1.46 and DirectSoft V 2.3.
Created Date: April 22,2002
Created by: RHanrahan
I was told that what you are trying to do won't work. I was going to try something similar but ended up doing all my data storage from within th CP-128 BASIC Module. It wasn't really hard to do but not for the timid... http://forum1.automationdirect.com/board/smile.gif
What I would really like to see is some kind of Flash Ram device that would allow storage of variables. That would be cool!
Created Date: April 22,2002
Created by: Art
The 250 CPU does not support data moves from Vmemory to ladder areas (Data Labels). On page 5-121 of the 205 users manual rev E, top left, only the 240 CPU is checked.
Created Date: April 23,2002
Created by: rsmith
Thanks RHanrahan and Art for your prompt replies!
The 250's PRINT is more important to me than the 240's two-way DLBL support. I'll probably use the DLBL for permanent storage of default settings and set aside blocks of battery-backed retentive memory for operators ' custom presets. Perhaps one percent of customers might experience frustration by forgetting to change the battery and having to re-enter their settings a few years down the road.
Moderator - feel free to delete this thread.