Step 7 first scan bit ?
Posted 20 January 2005 - 05:45 PM
The programming examples is using a "first scan bit" setting the state of the program at the initial start up. In this way bitmemories etc be set to the wanted values for a start up condition.
Is it possible to set up such a "first scan bit" for a s-7 300 / Step 7 5.2 ?
Posted 22 January 2005 - 01:22 PM
SET S "First Scan" S "Always On" R "Always Off" SAVE
and the last line in OB1 is
SET R "First Scan" S "Always On" R "Always Off" SAVE
This can also be done in ladder but it is quick and easy in STL so it's one of the few instances of STL I use.
Now if there was a way to get Last Scan such as GE has.
Posted 22 January 2005 - 05:22 PM
Posted 28 January 2005 - 05:08 AM
Omron is very good. You can do anything easily with CX-prorammer.
Posted 28 January 2005 - 06:01 AM
One thing about Siemens, I think, is also that things are explained in a more difficult way than it had to be, trough manuals, books, etc. Siemens can also be easy if explained (My opinion).
Have tried Omron with Syswin, but never the new CX.
Does it contain a simulator, so you can train programming on your laptop without the PLC ?
Best reg Arne.
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