Hi, all, i am starter for codesys system.

Now i have read the 8 bytes array from canbus.

but i need the data byte1 and 2,

i have no idea how to get these data. please help.

Hi!

Is it this you need?
Your arrCAN probably have from [0]-[7]

arrCANbus[0] = byte 1
arrCANbus[1] = byte 2
arrCANbus[x] = anybyte in the range see above.

/Torbjörn

thank you very much!

Since you are that new I would like to be clear. It appears that you said you want to read the data then you would do the following:

Byte0 := CanDataRec[0];
Byte1 := CanDataRec[1];
Byte2 := CanDataRec[2];
Byte3 := CanDataRec[3];
Byte4 := CanDataRec[4];
Byte5 := CanDataRec[5];
Byte6 := CanDataRec[6];
Byte7 := CanDataRec[7];

Now a few things: You don't need to add them to anther variable you already have them in the array but from my experience you will want to know how to read a 16 bit variable and 32 bit variable from your data array:

FUNCTION IO_BYTES_To_WORD : WORD
(*
   IN0 = LSB
   IN1 = MSB
*)
VAR_INPUT
   In0      :BYTE;
   In1      :BYTE;
END_VAR
VAR
   wTemp   :WORD;
END_VAR
wTemp   := In1;
wTemp   := SHL(wTemp,8) OR In0;
IO_BYTES_To_WORD   := wTemp;

So if you did the following:

word1 := IO_BYTES_TO_WORD(IN0:= Byte0, IN1:= Byte1); ( this will give you a word / int 16 bit from your two data bytes )

Follow the same logic for getting a DWORD 32bit from 4 bytes.

Is that any option to Insert / delete the element from Array?

I don't think so. Usually your are dealying with non dynamic variables in PLC's.
I don't know how it is the Codesys 3 with C/C++ code.

/Torbjörn