Momentum "first pass" bit

[rbyrne15 0]

I was wondering whether someone could explain how to address the bit in the status word of a Momentum processor, which denotes that the PLC is in its first scan. In Allen Bradley, this bit has the addres "S:1/15" - but in the Modicon equipment I have no idea. Even better than an explanation would be a pointer to the relevant page in the help file. Thanks, Richard Byrne. (Soon to be Technologist)

[rob_m 0]

I think that Modicon have not such a bit. Work around : Put a coil into the first network, first row and first colomn, connected to the left vertical line. A "transitional on" contact of that coil will be close only during the first scan. Hope this helps.

[datta jagtap 0]

PLEASE GO THROUGH THE ATTACHMENT. IT MAY BE HELP YOU !

[rbyrne15 0]

Thanks to both of you for the replies. I like the look of the workaround quoted above. It's now stored in my brain's programming toolbox. Richard.