Rounding errors micrologix

hello all,
I cannot seem to surpass this rounding issue i am having. every time a counter gets to 30 seconds, it rounds to 1 minute. i was wondering if there could be anyway to bypass this without math. for example by just changing a setting or something of that sort? any input would be much appreciated, thank you.

I am using rsemulation and rs logix micro starter pro

You are leaving something out, there has to be some math already to get from a value
representing seconds to a value representing minutes.

To stop the results from rounding use a floating point register instead of an integer as the destination of your math to converter to minutes. This would give you 30/60= .5 min. Is this what you want? Or please tell us what results you would like to see.

Mickey said:

You are leaving something out, there has to be some math already to get from a value
representing seconds to a value representing minutes.

To stop the results from rounding use a floating point register instead of an integer as the destination of your math to converter to minutes. This would give you 30/60= .5 min. Is this what you want? Or please tell us what results you would like to see.

Click to expand...

So i have my timer preset - timer acc. = seconds left (integer).

I then divide this integer by 60 to get total minutes left(integer).
If i start with 900 seconds as a preset, i will see 15 total minutes left.
I expect this integer to decrease every 60 seconds, but it decreases first at 30 seconds, and then every 60 seconds. soo this offset of thirty seconds makes my total time left off by 30 seconds, which could possibly be a crucial amount of time for what i am programming my plc to do....which is heat treat some different plastic products...ill attach my code, and you can see where i play with it at the very bottom in rung 100. it is a mess right now because i am desperately trying everything i can think of

here is the code in a compressed folder

You are leaving something out, there has to be some math already to get from a value
representing seconds to a value representing minutes.

To stop the results from rounding use a floating point register instead of an integer as the destination of your math to converter to minutes. This would give you 30/60= .5 min. Is this what you want? Or please tell us what results you would like to see.

Click to expand...

i guess i dont know what a floating point register would be in micrologix...would it be a data file?

I actually do not think it is included in my free software for the micrologix 1000....it would be an f8 right? i only have up to n7

You are right, your ML1000 does not support floating point data types.

I am completely lost at what you are trying to accomplish. What part of your program is controlling a heating process?

Guessing...
Why are you trying to convert to minutes for control? Just use the timers second's value to control your heating process.

I am completely lost at what you are trying to accomplish. What part of your program is controlling a heating process?

Guessing...
Why are you trying to convert to minutes for control? Just use the timers second's value to control your heating process.

Click to expand...

Im trying to convert to minutes for user friendly control. no user wants to look at seconds when watching a timer itd be absurd...

and as far as what im trying to accomplish, im setting u an hmi interface with a cincinatti subzero temperature treater...thingy...lol. I am only an intern, so my input is limited. Ive been trying to tell my mentor that it would be much simpler to tie in a temp sensor and preprogram the cycle times and what not...but he said to worry about all that bs after.


are there any ways to create a float using integers?

Im trying to convert to minutes for user friendly control. no user wants to look at seconds when watching a timer itd be absurd.

Click to expand...

I disagree.

But there is a difference between what an operator sees on a HMI screen and what is under the hood doing the actual control.