How to read the 16 bytes directly from the Modbus?

Hello

I got problem about the modbus register.

Means I have call serial No. Which is given the address of 5000 and series not is 16 bytes and each has high and low-bit bytes.

When I call using Modbus, so I can read the only first two bytes of address 5000 (4 bits) can you guide me please how I can read my serial No. bytes. Directly using modbus.

Maybe I'm not good enough explanation so here I have attached a diagram that redbox right side indicate serial no.which I gave.

LHS it not show the address of the register and the 12594 value is decimal maybe and then 16 bytes bytes.each has high and low bits.

I want to make Vi the help that I can see my # of series directly on the front.

right now I can only see 12594 value I want, I want to no.which series, I gave side pic HHR.

Can you please guide me how I can do...

also, I enclose example vi that I got from forum of NOR.

Thank you in advance...

It's basic Boolean math.

Read the byte.  If you want to determine the value of a particular bit, you AND another value.  For bit 0 AND it with 1 for bit 1 AND 2.  ANDing with 128 will give you the value of bit 7 (bit 8 and higher).  If the result is 0, then the bit is set to false.  If the result is > 0, then the bit is true.

Even easier is to take the number and convert it into a boolean number table function Boolean Array in the palette of the Boolean.  Then, you can index the particular Boolean you want from the table.

Tags: NI Software

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