Introduction.

Workshop PG5 Exercise Chapter 4
Solution:
1. Open a new FUPLA file ( You don’t need to open a new project ) called
Time.fup
2. Add a comment to your file!!!
3. If there are any other files in your project, then mark them as "notlinked". This way
the file will not be taken into considerations and will not be downloaded to the PCD.
4. Open the FUPLA editor and place the FBox "Time related: Time" and copy the
time to a Register called HMS. You have now the time as an integer value in a register
called HMS
5. Now you have to compare the content of this register with the time where you
want to turn the heating on ONTIME and the time you want to turn the heating off
again OFFTime. ONTime and OFFTime are for the moment just constants. Turn the
heating on at 1 o clock PM => (ONTime=10000) and turn it of at noon (OF-
FTime=120000)
There are several ways to solve the problem. I used the FBox ( "Integer: Is greater
or equal to" and Binary: Xor 2-10 inputs )
I first compare the actual time with the ONTime. If the actual time is bigger than then
the ontime, then you know that its later than OnTime and can basically start the
heating. Except if its already too late, and the OFF time has come. This is then tested
in the next FBox (TurnOFF ) ON_OFF Turns the heatin only on, if TurnON command
is there but the TurnOff command has not arrived yet.
DAY_NIGHT then inverses the signal in the case were you turn on the heating in the
evening but you turn off the heating in the morning.
6. You can add nice names on every FBox if you like to. Just move the pointer on
the FBox press the right mouse button and click on "FBox Properties" and add a
name.
OFF
© Saia-Burgess Controls Ltd. Page 4E-15