Codesys convert TIME to INT

Jonnie_R · Feb 1, 2015

Hi,

It's been a while since I've been doing PLC work as I've been concentrating on a large security project.

However I have a TIME variable in a project I am working on that I want to check to see if it is greater than zero before executing the code. The easiest way I can think of is to convert to INT, but this doesn't seem possible.

Is there an easy way to do this?

Jon

gclshortt · Feb 1, 2015

Can you not just use a compare?

Regards,
Garry
http://www.accautomation.ca

ndzied1 · Feb 1, 2015

It may depend on what your hardware supports but you should be able to convert a TIME variable to a UDINT (unsigned double integer) or DWORD since it is a 32 bit value.

I believe it converts it to the number of milliseconds represented by the TIME var.

Jonnie_R · Feb 1, 2015

I'll try one of those then, cheers norm.

Garry,

I tried IF {VAR} = 0 but it didn't like it, I'm writing a custom function block in ST which I neglected to mention in my original post.

Jon

shooter · Feb 1, 2015

as a negative time does not exist and the format is 4 bytes conversion to int is no good, with longer times it could even go negative.
to compare make variabele called
zerotime:TIME:=t#0ms;
now you can easy compare.
a nice lib is oscat.de go to downloadmanager version 3.3
get txt,pdf,lib

Jonnie_R · Feb 1, 2015

Nice solution shooter, I have the Oscat libraries installed already, but I've downloaded the PDF.

Thanks,

Jon

CapinWinky · Feb 2, 2015

TIME is a DINT that is in milliseconds, not a UDINT. There is no rule against negative TIME values and you can easily get them if you are subtracting two times to get a time difference. Even Date_Time is a DINT of ms since Jan 1, 1970, so dates before 1970 are negative DINT values.

ndzied1 · Feb 2, 2015

Thanks Capin. I was going from memory so I appreciate the assist

shooter · Feb 2, 2015

sorry cap you are correct as long as the top bit is not used. but TIME is unsigned, however yes you are correct when saying you can subtract them but you get a very high value so it is unsigned. only when using a signed variabele you get the correct value.
try subtracting 2 TIME values and you will see.

and when using DATE format same problem,
i am getting dates in 2106 (i will be dead)

CapinWinky · Feb 2, 2015

I just checked and signed or unsigned seems to be platform specific. PacDriveM it is unsigned, and B&R it is signed. The IEC standard also doesn't explicitly say if it should be signed or unsigned (or even that it should be 32 bit).

shooter · Feb 4, 2015

If it is signed the maxvalue is different probably.

@jonnie
to keep out of problems when overflowing use
if ((now()- previous) >= setting )

satnam_singh · Jun 25, 2019

Convert DT to Individual Numbers

There is a Function called "SplitDateTime" (Search it in the Library Manager) and it's available in the system "Util" Library! I swear to god, it's that easy!
It took me a week of searching, off and on whenever I had time, to find it.

It gives you Year, Month, Day, Hour, Min, Sec, Milisec, and DayOfWeek as UINTs, Simple as can be!

SEE ATTACHED .jpeg FILES

it takes an input of type ULINT which you can get by using the function block "GetTime" from the same library, This "GetTime" has a type ULINT output, which you can take it and feed it directly as input to the "SplitDateTime" function and out comes exactly what you need!

Codesys convert TIME to INT

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