Help with running simultaneously with SFC

2020-02-27T19:52:44.951000Z

i made you an example of a function block call in a ladder.

Help with running simultaneously with SFC

2020-02-27T19:52:41.261000Z

Shooter,
Thank you for the advise.
I have created all the function blocks for my individual tracks & I have imported all the codes from my previous program.

However, I do not know how to call the function blocks from the main program.
The error that I get when I compile the program:
"Error 4301:PLC_PRG (22):POU'AE_ROUTE_Prog' needs exactly 0 input"

It is like the coil or FB that I place at the end of the rung is not supposed to be there.

Jon Kang

JonKang TrainTrack.pro [196.35 KiB]

Help with running simultaneously with SFC

2020-02-27T19:52:39.982000Z

Making a user function block is easy
go to POU
right click and add a POU.
select it to be a function block, select a language
type in a name
now the editor opens a new window
Here you can make your program.
if you make a new variable it will ask if it is a input /output etc.
After finished programming
go to the program where you would like to call the block.
insert a FB
you will need to give it a name
in the declaration above you need to give this name a type.
r_trig is a function (almost same as a function block.

Help with running simultaneously with SFC

2020-02-27T19:52:38.688000Z

I changed my program significantly by removing SFC totally.
The problem I am facing now is inserting Function blocks.

This is roughly what I have done so far.

Start program
-- Reset all routes
Select route from interface
-- I have managed to allow 2 sets of route to be chosen after not using SFC.
Check route(s)
-- If all route clear, proceed to Function Block of individual train tracks
-- If not clear, wait for all tracks to clear before proceeding.

I plan to use function blocks to help reduce the length of the program to make it easier to trouble shoot.
However, I am not sure how does the function block works & how to place them.
I have attached my program for your reference.

JonKang TrainTrack.pro [183.13 KiB]

Help with running simultaneously with SFC

2020-02-27T19:52:35.064000Z

Oke so i made one line a bit added
check also the action as i used limitalarm (from util.lib)
This way only one block is on.
as there are still no comments, i can not check your program.
However i see it running when all BOOLs are correct.

Keep it in this direction, as you can see on simulation it does work.

SFC CS150211.pro [82.92 KiB]

Help with running simultaneously with SFC

2020-02-27T19:52:33.794000Z

tell the supervisor please :
a parallel branch is used to have actions running parallel, and all actions needs to be ended, before the next step is executed.
However you only have one branch running at a time, the rest should not be active at same moment.

so you need parallel transition to make a decision what branch should be active.

Help with running simultaneously with SFC

2020-02-27T19:52:30.183000Z

Hi Paul,

I have been advised by my supervisor to use the parallel branches but so far everything doesn't seem to be working out for me.

This is the program that I came up before I switch them to all parallel branch.
For this attached program, I can select the start point (1st row) & the end point (2nd row).
For example after pressing start (A) & end (C), I will need to press on the Point Machine 1 & 3's right button, before the train (brown) will move.

For now, I have used colored coding for the track status but there isn't any track checking at the moment.
Green: Good to go
White: Track is planned to be used
Red: Track in use

And after the train reaches it's destination, I will have to reset the whole program in order to run again, if not the 1st train will keep moving in same direction.

SFC Parallel Setup Orig.pro [153.56 KiB]

Help with running simultaneously with SFC

2020-02-27T19:52:28.909000Z

So what are you making now?
send an zipped export of your program, and i can advice you if you will be able to make it working.
within the actions you can also use ST or LD or any other language.

do not use the double line as it means all branches are waiting until they are all done.
make a new SFC with
start button transition
input a character (A..E)
transition is character <>""
blink possible end characters
input another character
if possible blink the go
empty action
transitions are all combinations as you did.
the actions are dependant of the route so set switches
if switches are set you can go back to start.

In ST you can use functionblocks to get rid of long programs.
how is progress?

depending on level use occupied color when a train is passing.
make a logarray with times and wayplan (in real this is automatic done, so at 12:34 a way is set auto, then at at 12:40 another train will arrive and needs another setting.
this is a separate program and can be nice as demorun. you only need a few ways .
but you could say a passengertrain from B to D
a cargo from A to E
a passenger from C to A
a loc from B to D and back to A and up to E

you can use a polygon instead of these rectangles. (these you can turn)
make each railpart a separate visualisation and use placeholdernames.

Help with running simultaneously with SFC

2020-02-27T19:52:25.332000Z

Hi Paul,

You mentioned that I should just use simple LD or ST, rather than SFC with parallel branch.
1 of the concern that made me use SFC was that the program will get too long & difficult to troubleshoot, hence my supervisor advised me to try SFC.

Jonthan Kang
(Dellsuperman)

Help with running simultaneously with SFC

2020-02-27T19:52:24.053000Z

Hi Shooter, thank you for your reply.
I'll try those things that you mention & get back if i have any issues.

KangJonathan
[DellSuperman]

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