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Hello,

I was trying to build to build by myself a circuit network for a LTN system with interruption (another one sorry), and I ran into a problem I don't know how to solve.
I don't even know what keyword I should search to find a solution for my problem.

The problem seems to be that for a very brief moment (should be one or two game frame I think), my circuit outputs the wrong number, causing too many trains to come to the station.
By looking up online, I saw that signals flows instantly in the same network, but have a delay of one game frame when separated by a combinator.
In my first attempt, I used a selector to perform a min of some signals, and I checked if no signals is equal to zero after.
This did'nt work as for a few games frames, a signal was not equal to zero, but still zero in the selector, leading to the wrong value outputed.

I tried to fix it in this new blueprint by checking on the condition before performing the min, therefore computations are not trigerred if the condition is false.
But I still encouter the same issue.

Could someone point me to the relevant resources to understand my mistake, or in the best case, explain it directly ?

The blueprint of the circuit network : 0eNrFV1tvmzAU/i9+nEwXc8tF6l72usdKnVRFyAG3tQo2MyZdVvHfd2xIQlOnAbpqiRSd+PKd79w+khe0yWtWKi40Wr0gnkpRodXdC6r4g6C5WRO0YGiFFM2oQg1GXGTsN1qRBjtOUcX1Y8E0T71UFhsuqJb9W36zxogJzTVnrSP7ZZeIutgwBbD4fSiMSlnBbSmMV0D0fBJeRRjt0GoegCOIQCuZJxv2SLccbsCxI1QC25m9XpmNe64qnRyj0LvSuN5ypWtYOXBpT3jfTSQVMxgGqNLUpM0DzrJkiras0Be4J2td1n3kDogrKbwyp5qhBl74Tfw+fp1wV7yzfbz+VeTCCA4Ye5KDMxgBIkYZVyxtT4TujFbtfvXahnLuuwNDbnPN1OlqRyyXwEhqvmXA5xfkGvjDspCqsHmH3ZIqy3eFru1CbXIdNGt4u4IOJzRO0AYdngZN/M/tI0bTR2crDemkC9g/zjRWdDzIcghUqoHZiYZmp8+89YFwZyQFBcx7mlesk4Je0DMX3fhAN2Mpz9hFtmQk2w72pJD9b3dv6+qY4pNe/YaMwrVFO1XSIeqSynKX2GZP7pUsEi4AqEvdmc6fj64sGdn3/coqKjJZAGxrJHWZQR6AJwz71sRJZs6CLg4sC5bxuvAsVwVDWsqcva9KsVvnltN1bv6pOncU8V6njNI5Yh+vHRwM4oXWuR2JHs968OFF+J/j4MOzIk1m01U6/s8qPW6OPyrje+d9zolg+lmqJxuMYtlBUR8UY+BIq5q5xZ+Qqeo/dFBeib+m6ZNX8T/mR46DjD+hCchnNYFT0seW/Oa05F8nlPzmzJObBNPzNbR8/2pmbp3Zc+b4oxNy88bV0PmAB/QzZMRI9h3BPl5gf43BCsE2FnziubUCsECzjGk2IxxaK+yuRO22WYztnb3V3YlxYEwC5sKstvBLTDDUlFgTVknrftaeMBDEcIEjdt2wATtcA22uWQEZOP5nw2gLzx6bxCj2l+FyGc3nYRwvlk3zF6aRqC4=

Thx in advance

I imported your Blueprint into a Test Lab, but I honestly cannot tell what connects to what? There is no Train Stop, or Descriptions on any of the Combinators to indicate what each Signal means. I can suggest you try the Map Editor mode to Debug circuit networks. The "Time" tab has controls that let you advance it by one "Tick" at a time, which is very helpful for inspecting Logic at each step.

You can also use the [bp][/bp] BBcode Tag here on the forums to share your Blueprints in a prettier way:
Copy blueprint

Good Luck!

Thanks for the map editor trick!

I will try, and if it doesn't work, i will try to come back with a better description of each combinator role.

The combinator performing the division (iron plates / T) never gets any iron plate signal. At its input, there is nothing connected that can ever provide this signal.
I don't understand the contraption as a whole and don't understand if it's important, but this part is definitely not correct.

Tertius wrote: Thu Sep 25, 2025 10:04 am The combinator performing the division (iron plates / T) never gets any iron plate signal. At its input, there is nothing connected that can ever provide this signal.
I don't understand the contraption as a whole and don't understand if it's important, but this part is definitely not correct.

The electric post is linked to the train station and chests, and as it was not the root of the problems, I didn't included it.

I am happy because I managed to solve it without adding a new combinator just to synchronize the signal, I just had to perform the condition checking at the right moment

If someone needs the solution (I highly doubt but we never know), here's the blueprint with comments Copy blueprint

Anyways, thanks for the time and help!