transfer from cx-programmer to sysmac studio

[vasekd 6]

I am new in sysmac studio programming. I used WSFT function (word shift) in cx-programmer. What function I will use in Sysmac studio? Thanks.

[Crossbow 294]

I would use an array and use the Stack commands.  What is your end goal?

[f3dps2 4]

To accomplish a bit shift in sysmac studio, you need to:

1. Create a 'UNION' data type. I called mine SFT, then added 2 members - 'Ary' is of type ARRAY [0..15] OF BOOL, 'Wrd' is of type WORD.

2. Create a global variable for your shift. For this example, let's call it BitSft, of type SFT.

3. Add a function block to your ladder program - 'AryShiftReg', call the instance whatever you want.

4. Execution condition goes on the >Shift input

5. Reset condition on the -Reset input (usually emergency stop etc)

6. If you put '1' on the 'In' input, the register will hold the previous bits on as it clocks - eg 00000001 > 00000011 > 00000111

   If you put '0' on the 'In' input, the register will shift a 1 through the word - eg 00000001 > 00000010 > 00000100 BUT only if you use the function MOVE 16#1 BitSft.Wrd to get it started **.

7. 'InOut' should have BitSft.Ary[0] in it

8. 'Size' should have '16' in it.

9. Use 'BitSft.Ary[0]' as the first boolean contact in your ladder program to execute conditions for step 0

**: you can use the move function to move a BCD number into the BitSft.Wrd to change its position at any time, but remember it will need to be 1>2>4>8>10>20>40 etc

[vasekd 6]

Thank you,

I will try it as soon as possible. This is exactly the type of instructions for me

[Dinos 1]

This works perfect, However my question is what if you need  the shift register to be 32 bit long. What do you have to modify for that  to function.

 

Thanks!

Dino

[Crossbow 294]

Change the union to a DWORD and make the bit array 32 bits long.

Change the size on the AryShiftReg input to 32.