How can read running status of C-applications

[illop]

Hi, All

 

I want to know status of C-applications(capp1).. in PowerPMAC

(Stop or Running)

How can monitoring in plc program or bgcplc..?

 

Thanks

[Alex Anikstein]

UserAlgo.BgCplc[i] will be set to 1 if C PLC i is enabled and 0 if it is disabled. UserAlgo.RtiCplc will determine if the foreground C PLC is enabled.

 

Edit: This works for C PLCs, not for C Applications--I misread.

[Clopedandle]

For background C applications, there is no "easy" way to know. You can technically issue the "top" command to the system shell:

 

system "top"

 

and then parse the response to see if your program is listed (e.g. capp1.out). Top is a Linux command that shows running processes:

 

http://www.tecmint.com/12-top-command-examples-in-linux/

 

There might be a cuter Linux command out there, but I am not an expert on it.

 

It is much easier, though, to put a global variable that increments as the program runs, for example, and then just check if that variable is incrementing to verify that the program is running.