Indexed access the temporary array within a fc

[antonio]

Forgive my English and a little bad, how do I within a fc access a temporary array?

language: stl

statement: array data [1..100] of int

as I am trying to access

#data [#address]

[SHKODRAN]

Hello ,
see the sample below:

Code: Select all

      L     P##Array_Data    // Start adress of 6 byte long pointer in memory
      LAR1  
      L     W [AR1,P#0.0]              // load value of first Word in Array
      L     W [AR1,P#2.0]              // load value of second Word in Array
      L     W [AR1,P#4.0]              // load value of third Word in Array
      etc.

[ruzickja]

One idea, but not tested:
In the standard library, there are very promissing blocks:
FC91 WRD_TBL
FC89 TBL_WRD

Other approach:
L #Index
SLD 4 //because the address is bit-oriented, so for 16-bit it is shift by 4 (*16), for 8bit it is shift by 3 (*8), DINT is shift by 5 (*32)
L P##Array_Data // Start adress of 6 byte long pointer in memory
+D //Do the pointer arithmetics
LAR1 //Load the AR1 adress-register
L W [AR1,P#0.0] // load value of Array_Data[Index]. Note it is 16-bit INT. // For DINT it is L D [AR1,P#0.0]