Dear experts:  I'm trying to understand how this FC functions.  It looks like a timer but I this is too advanced for me.  "FC-ZEIT" is called in 15 different FC's and FB's.  Each time it is called Zeitwerk:= has a different value.  Can someone explain ?  Thanks. 

      CALL  "FC-ZEIT"
       EIN     :="E  *FI KM     EXT     KM"
       SE      :=FALSE
       SA      :=TRUE
       ZEITWERK:=127                    // VRZ_UEW_Filter_2
       GUELTIG :=#vrz_filter2_verschm

FC130 "FC-Zeit"

It is just an easy ON / or OFF delay timer.

Somebody makes it to save S5T - Timers.

It need some data block with values.

It looks not very pretty, perhaps the work of an PLC - beginner.

Maybe you can explain to me networks 2.  "#Zeitwerk" is only for loading what time value?  And then time value is them multiplied by 10 + 4?  What is being loaded to " DBW [AR1,P#0.0"?

FC130 "FC-Zeit"
network 2: Zeiten auf Lokaldaten abbilden

      L     #ZEITWERK
      L     10
      *I   
      +     -4                          // (n-1)*10 +4
      SLD   3                         //Shift Left Double Word (32-Bit)
      LAR1                             // Load Address Register 1 from ACCU 1
      L     DBW [AR1,P#0.0]
      T     LW     0

No, there is no calculation of time value.

There is just the calculation of the ADDRESS in the datablock where the FC find the time value!

The "Zeitwerk" is the offset of the memory area what contains the time values.

Just have a look in the DB tha is opened in your program before this FC is called.

After searching in the DB’s I found one labeled “DB-ZEIT”  DB171.CALL  "FC-ZEIT".

EIN     :="E  *FI KM     EXT     KM"
SE      :=FALSE
SA      :=TRUE
ZEITWERK:=127// VRZ_UEW_Filter_2.   Address 1266.0.  =“VRZ_UEW_Filter_2.ZEIT_SOLL (DB171.DBD1272)”
GUELTIG :=#vrz_filter2_verschm

 see attachment