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Split from TIA portal V13 s7 1200 two jump funktion in one network FDB.

Hati

You want to give a new PT (Preset time) value? You can use -[PT]- to give a new value for a timer.

@Hati: That is helpful if the timer has already been started.

Perhaps the TS needs to know how to connect a TIME tag to the Timer and be able to select a time to load into that tag?

Indeed, it seems to me that there are at least two – and arguably three – completely separate challenges here. The first one is how to setup and monitor the system clock to generate an action at a configurable time and date. The second challenge is actually quite familiar – making two timers trigger each other in a continuous cycle. Once you have solved those two, the final challenge, making the two time values configurable, is the easy bit.

So, setting and reading the system time – there are specific functions for this, WR_SYS_T, RD_SYS_T and RD_LOC_T, found under Extended instructions \ Date and time-of-day. Read up on the help file on these functions. When it comes to detecting a specific date and time, I’m afraid you have to compare each element – day – month – year – hour – minute – and second if you need that accuracy. I once decided that I didn’t need the second data and ended my comparison at minutes. When I then tested it and found that it worked, I immediately stopped the triggered action, but it just immediately started again. It took me few moments of bafflement to realise that the configured minute was still active so the trigger condition was still being met.

I do have something for the reciprocating timers, but I’ll have to dig it out. I could probably post something tomorrow if you are interested.

Hello,

you can use a "time of day"-interrupt (OB)

or you can use the function "FB LGF_TimerSwitch"

from the LGF (Library of general functions) .

regards
CaOd

samdawit

Yes Please, I am interested. Thank you.

 Okay, well here’s a couple of different solutions. The cycle timer version uses only one timer and is clearly simpler, which is why I guess it is the one that most people would favour. But I’m not sure I don’t prefer the separate on and off timers. I suppose it is a question of whether you want the user to configure it as an on and off time or as a cycle time and on time. Of course, you can still have the user configure it either way with either solution, you just might have to do a little maths.