Introduction.

Workshop PG5 Exercise Chapter 4
Solution:
1. Open a new FUPLA file ( You don’t need to open a new project ) called
Lot.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 and enter the input signals at the left and the out put signal at
the right.
5. Place a up- down counter on your sheet and make it count up with each pulse
from Input 0 ( NewCar ) and down with each pulse from input 1 ( Car_leaving
).
FBOX:
Counters: up down with preset
Binary : Dynamize
When you start up your PCD, the counter might already contain a value. So we must
reset the counter at start-up.
The small FBox on the side may be found in the family: ( Binary: Dynamize )
If you start up your PCD, then the input of the FBox "Dyn" goes from 0 to 1 ( When
the constant 1 is loaded into the input ) and stays at one from then on. This change
from 0 to 1 makes the output go to 1 at start-up. The signal is connected to the input
"Set" which then loads "0" into the counter. Cool trick he?
© Saia-Burgess Controls Ltd. Page 4E-19