Integer Size Limit

Using AB Micrologix 1000, I am trying to count totalizer pulses into an integer word. But the maximum number that an integer can store is 32767. Is there a work around to this to store larger numbers? Micrologix 1000 does not seem to support floating point data type. I could not find anything using search, but if this has already been answered before please point me to the thread.

As far as I know there is no clean work-around for this situation.
This suggestion isn't very clean but it may work for you depending on what you need to do with the totals. You can cascade a group of integers to keep track of larger counts. For example, use one integer to count from 0 - 9999. On count 10000, reset the first integer to zero and increment a second integer by 1. You can do the use a third integer if you need to get above 99999999.
Like I said, it isn't real clean but it will accurately keep track of the counts.

Keith

Keith's solution is typical in many cases.

It can be used for time-counting as well as event counting.

The problem is, Can the accumulated number be displayed or manipulated by any math function?

If your PLC does not recognize numbers greater than 32xxx (1-word), then you could certainly have a problem trying to do anything with the accumulated number.

For example, if your accumulated value, using two 16-bit words, was 42xxx... that is, word-1 = 1 (32xxx) and word-2 = 10,000, then how can you do any thing with that number?

There certainly are ways to perform any math function on any number, no matter how you have it stored, but you have to go through much effort to make sense of it.

You could go through the effort of keeping track of the numbers in the same way that math does, that is...

x-number of 1's,
x-number of 10's,
x-number of 100's,
x-number of 1,000's,
x-number of 10,000's,
x-number of 100,000's etc.
(where x = 0 to 9)

That makes it much easier to do math on numbers that are larger than your PLC can handle. You can ADD, SUBTRACT, MULTIPLY and DIVIDE these huge numbers.

Using that method will also allow you to display numbers on your HMI that are larger than the HMI recognizes. You simply display individual unit numbers.

x-number of 100,000's,
x-number of 10,000's,
x-number of 1,000's,
COMMA
x-number of 100's,
x-number of 10's,
x-number of 1's
(where x = 0 to 9)

It takes quite a bit of extra code, but it can be done. Even in a dumb ol' AB Micrologix 1000.

Just a "heads-up".

Try creating a long integer data file "L" and count into that register. These registers are 32 bit integers.

Thank you

Thank you all for the suggestions. I feared there was no straightforward way of doing this. Terry's and Keith's suggestions will be a great start for me. I had used "L" long integer files in the past with Micrologix 1500 but they are not supported on 1000. In fact 1000 does not allow any user defined data files.