adccommunitymod (AutomationDirect) asked a question.
Run Mode Program Edit - DL05 vs D2-260
Created Date: April 08,2014
Created By: sgsims
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When I perform a RUN Mode program edit with the DL05 I seem to get some different Behavior than when I perform the same edit with a D2-260 CPU. Is there a difference between the 2 CPUs? With the DL05 it seems to activate my ISG stage Box with the D2-260 it doesn't activate the stage Box when I perform the RUN Mode program edit. Could be something specific to my program but thought I would ask the easy question first.
Created Date: April 08,2014
Created by: Do-more PE
Most likely it is the difference in Retentive Ranges. (PLC-> Setup -> Retentive Range)
Created Date: April 08,2014
Created by: sgsims
So does a RUN Mode Edit trigger the ISG to go High when the CPU goes from RUN to Program then back to RUN?
Created Date: April 08,2014
Created by: franji1
So does a RUN Mode Edit trigger the ISG to go High when the CPU goes from RUN to Program then back to RUN?
Run mode edit is different than Run->Pgm->Run.
During a Run mode edit, the PLC maintains state as much as possible, and on one scan it was running program X, and on the next scan it is running program Y. I say "as much as possible " because I/O can change, time is changing, it even takes time to download the program in Run mode, so that "scan " can be a "long " time.
Run->Program mode, followed by (whether or not you download a new program) Program->Run, this is a "startup " situation. Things like SP0 are on (first scan) for that "first " scan (i.e. first scan after a Pgm->Run transition), the ISGs are initially ON and all other SG are initially OFF. Other things happen on a Pgm->Run transition that do NOT happen during a Run mode edit. There are caveats with both (e.g. in Program mode, all Outputs are OFF).
Run mode edits are only supported by the K-Sequence and ECOM communication protocols. DirectNET does NOT support Run mode edit. You HAVE to go into Program mode to write a program to the PLC if your protocol is DirectNET (always try to use K-Sequence or ECOM protocol when using DirectSOFT - there are other features that are NOT available using DirectNET).
Created Date: April 08,2014
Created by: sgsims
When I perform a RUN Mode program edit with the DL05 I seem to get some different Behavior than when I perform the same edit with a D2-260 CPU. Is there a difference between the 2 CPUs?
With the DL05 it seems to activate my ISG stage Box with the D2-260 it doesn't activate the stage Box when I perform the RUN Mode program edit.
Could be something specific to my program but thought I would ask the easy question first.