Gray coded absolute encoder

[kapil]

Hello,

i am new to unitronics and i want to read the absolute encoder having gray code, 9bit, 512steps/rev. single turn. of the make Pepperl + Fuchs.

so can i do it oplc?

i have V130-33-TR20 model.

if possible pl. give example of program.

[Joe Tauser]

Unitronics does not have a native Gray code conversion block. I did some searching and found some examples of converting Gray code to binary-

http://www.plcdev.com/using_ladder_logic_for_gray_code_conversion

Once you've got the code in binary format you can use an MB->MI block to get the number.

Joe T.

[kapil]

Dear sir,

thanks for the useful link. I tried it at my level making the ladder relative to that but it does not work.

so I attached my ladder to this i would be grateful to you if you guide me. I have mentioned the type and make of encoder in ladder. it is a 9bit encoder and there are 512 steps/ revolution.

thanks.

kapil

Test Absolute encoder.vlp

[Simon]

Here's one I prepared earlier, for 13-bit code. Hopefully it is clear enough to understand how to use for 9-bit.

Gray Code V280.vlp