Simple hours counter, with a value return on string

[Bart]

I have to realize a hour counter for several devices, I need to count the working time of each device. For this I thought to realize a function block, so it can be reused for each device.

I plan to save the values ​​to a log file, so it would be helpful if the function block returns the value of working hours on a string, in the format hhhhhhhh:mm:ss; so it can be saved to a file in CSV format and then imported into Excel.

Could I have an example program of this ?

[Sergio Bertana]

I’ve developed the HourCounter FB, this FB calculates the work time of a device. The device start signal must be passed to the FB, since the hours counter has to be RETAIN and is not possible to define RETAIN variables in a FB, so the hours counter variable must be a RETAIN variable the address of which must be passed to the FB. 

The FB returns also a string that reports the working time expressed as: hhhhhhhhhh:mm:ss;

The example program I made use the logic input %IX0.0 as a device start signal and it’s possible to see the results by debugging the program. Here the print out of the program and the source code.

[Autore]

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