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Hello,

I am trying to convert a Siemens S5 program into Allen Bradley Contrologix. There is no pulse timer function in the RSlogix5000 editor that I am using. Does anyone know the best way of converting an Allen Bradley on delay or off delay so that it emulates a pulse timer? Sorry if it's a daft question, but it's got me a bit confused.

Cheers, Terry

Easy, as long as I am understanding the pulse timer correctly. In the AB world, use a TON (on delay) and use the TT (timer timing) output bit (ex. T4:1.TT). The TT bit will be true from the time the rung with the timer goes true until the timer times out.

Bill Sturm

A simple way to use is "One Shot" instruction in front of a timer. AB calls the one shot as an input instruction, hence all the enabling conditions (for the one shot) should be before the one shot in a rung. In other words, in a rung, first you have all the enabling conditions, next one shot instruction and finally the timer. Hope this is of some help.

RKS