Hey Guys!

Currently using Version 2.3.9.34 with an ABB AC500 PLC (PM591).

I am trying to get the timing between two events. I won't go into high detail, let's just say, for the sake of discussion, when either of the two events occur, they set a corresponding boolean variable = TRUE.

So, if Machine Starts, bStart = TRUE.
And, if Machine Stops, bStop = TRUE.

I'm over simplifying to make this easy to answer.

I just need the elapsed system time between the two events. Here is the code I am currently using:

(* SYSTEM TIME *)
TIME_SYS   :=SYS_TIME(TRUE);
TIME_END   :=TIME_SYS;
(* RTC IN SECONDS *)
RTC_TIME   :=SysRtcGetTime(TRUE);
TIME_END2   :=RTC_TIME;
(* EVENT TIMER *)
RTRIG(CLK:= ESC_FAULT, Q=>);      (* START TIMER    *)
FTRIG(CLK:= ESC_RUN, Q=> );      (* STOP TIMER    *)
IF RTRIG.Q OR FTRIG.Q = TRUE THEN
   COUNT             :=    COUNT + 1;
   EVENT_TIME         :=   TIME_END - TIME_START;
   TIME_START         :=   TIME_SYS;
   EVENT_TIME2         :=   TIME_END2 - TIME_START2;
   TIME_START2         :=   RTC_TIME;
END_IF;

The two times are redundant. One is DWORD and the other is DT format.

This seems to work in my current configuration, but if I want to test a scenario where the event is defined by a value reaching or exceeding a set point, it doesn't seem to function properly.

Does anyone have a function block they use for timing system events?

Any help is surely appreciated. Thanks!

yes have a look at w www.oscat.de w it is english library for codesys with lots of functions etc.
keep all times in DT format easier to work .

I simplified the code:

FUNCTION_BLOCK TIMER_SYS
(* INPUT VARIABLES    *)
VAR_INPUT
   bSTART: BOOL;
   bSTOP: BOOL;
END_VAR
(* OUTPUT VARIABLES   *)
VAR_OUTPUT
   dwLAP_TIME:    DWORD;
END_VAR
(* LOCAL VARIABLES   *)
VAR
   dwTIME_SYS:       DWORD;
   dwTIME_END:       DWORD;
   dwTIME_START:    DWORD;
   rtSTART:       R_TRIG;
   rtSTOP:       R_TRIG;
END_VAR
dwTIME_SYS   := SYS_TIME(TRUE);
dwTIME_END   := dwTIME_SYS;
rtSTART(CLK:= bSTART, Q=>);            (* START TIMER    *)
rtSTOP(CLK:= bSTOP, Q=> );               (* STOP TIMER    *)
IF rtSTART.Q OR rtSTOP.Q = TRUE THEN
   dwLAP_TIME      :=   dwTIME_END - dwTIME_START;
   dwTIME_START      :=   dwTIME_SYS;
END_IF;

Now, I have this function block to use to find the time between two events:

Time is output to dwLAP_TIME in milliseconds.

Feel free to use this!

Hi
Just wanted to know which library is used to get sys_time

a few seconds later with google search...

https://stackoverflow.com/a/61986234
SYS_TIME is definitely an ABB AC500 specific function, included in library SysInt_AC500_V10.lib.