[When calling subprogams from command line, Sys.Time doesn't update]

I'm hoping to get some type of confirmation on this issue.

 

When a PMAC script subprogram contains a call to the system timer (i.e. Sys.Time), the subprogram does not appear to function correctly when called from the command line.

 

For example:

 

open subprog timer(time)

 

local stop_time;

stop_time = sys.time + time;

 

while(sys.time < stop_time) { };

 

close

 

This program can be called just fine from within a PLC, however, it appears to get hung when called with a 'cx' command from the command line. It appears that sys.time doesn't increment.

 

PMAC firmware version 2.1.1.3

 

Edit: I'm thinking this is due to the fact that the subprogram isn't being called from within a PLC, thus it doesn't adhere to the typical PLC scan engine. If this is the case, the better question would be "how does a script subprogram execute if not called within a PLC?"