How to best assign Beckhoff EL6851 DMX channels - plc

Question

on Beckhoff's EL6851, to assign DMX channels to the variables I can either do this :
Option1
bEL6851_DmxChannels AT %Q* : ARRAY[1..512] OF USINT;
or this
Option2 :
bEL6851_DmxChannelsChunk1 AT %Q* : ARRAY[1..64] OF USINT;
bEL6851_DmxChannelsChunk2 AT %Q* : ARRAY[65..128] OF USINT;
bEL6851_DmxChannelsChunk3 AT %Q* : ARRAY[129..192] OF USINT;
bEL6851_DmxChannelsChunk4 AT %Q* : ARRAY[193..256] OF USINT;
bEL6851_DmxChannelsChunk5 AT %Q* : ARRAY[257..320] OF USINT;
bEL6851_DmxChannelsChunk6 AT %Q* : ARRAY[321..384] OF USINT;
bEL6851_DmxChannelsChunk7 AT %Q* : ARRAY[385..448] OF USINT;
bEL6851_DmxChannelsChunk8 AT %Q* : ARRAY[449..512] OF USINT;
Option1 means I need to double click 512 times to assing every variable - not an option.
Option2 meansI get 8 arrays instead of 1. How can I now make this into a single array that works as standard 512 elements array in Option1.
I tried this but simple copy doesn't work. I guess some references or pointers ?
FOR counter := 1 TO 64 BY 1 DO
bEL6851_DmxChannels[counter] := bEL6851_DmxChannelsChunk1[counter];
END_FOR
...
bEL6851_DmxChannels[counter] := 255; // this won't work.

Answer 1

Turns out that all you have to do to make it work with 512 elements array is tick the "All Types" after you right click each 64 channels chunk. Hope that saves someone few headaches !

Answer 2

I am not sure it will work in your case (i mean if you can assign it to module vars) but one of the ways is to create multiple level array.
VAR
DmxChannels : ARRAY[1..512] OF USINT;
DmxChannelsM AT %Q* : ARRAY[1..8,1..64] OF USINT;
i,j:INT;
END_VAR
FOR i := 1 TO 8 DO
FOR j := 1 TO 64 DO
DmxChannels[((i - 1) * 64) + j] :=
DmxChannelsM[i,j];
END_FOR
END_FOR