Mitsubishi FX - Referencing bits in words...

[donnedved1960]

So my HMI is writing D words to the FX1s PLC for buttons, etc. How does one reference these bits in the PLC? I've tried several syntaxes on an open contact using D71.0, etc. How does one use D-words at the bit level in ladder?

Thanks for any help!!

 

[Sergei Troizky]

The FX1S does not support bit-level addressing for D registers.
Copy the register value to a word of bits and read bits from there.
For example: after MOV D10 K4M100, bits M100-M115 reflect the D10 bits.

 

[donnedved1960]

So does the K4 represent 4 bits are moved?

 

[nehpets]

The K4 represents 4 nybbles (4 bits) therefore K4 = 16 bits (the length of the D register)

Hope this helps

Steve