How do entend a timer past the 99.99 sec limitation

[Hoose 0]

Hi! I'm completely new to the Direct Logic PLC's (and most PLC's in general), it's a new thing we're trying out here at work and I have been volunteered to learn it. I have limited experience with Concept and RS Logix 500. I'm using a DL06 to monitor and have limited control of a system. One of the things that I've run into is that I need to run a timer (ONDTMR) for anywhere up to 14 hours. But the limitation is 99.99 secs. How do I get around this limitation? Is there a different timer, do I assign a V location to it and assign a time to that (and if so, how)? Thanks! Mike Edited 25 Mar 2009 by Hoose

[b_carlton 61]

Don't use the ONDTMR IBOX. Use a TMRA. This accumulates time while the input line is true. it is reset by a seperate line. But more importantly it take a 2 word preset (99999999) which gives you 115 days (or 11.5 days if you use the TMRAF). Note that it ties up the nest timer number also. (I.E if you use TMRA10 then TMR11 is also being used. - Note this in your documentation as you set up the TMRA)

[Hoose 0]

Works like a charm. Thank you very much! Mike