Logic Functions

Function blocks are provided for:

• Bit Test

• Set/Reset Bit

• AND

• OR

• XOR

• Shift

• Rotate

• Convert

• Test Bit

• RS-SR Flip-Flop

• RLO to Bit

The internal operation of a function block is transparent to the user. You select input operands; the result is automatically output by the function block.

The input values in a logic function may be:

• Memory Integer (MI)

• Memory Long Integer (ML)

• Double Word (DW)

• System Operands:(SI) (SL) (SDW)

• Network System Integer (NSI)

• Constant Value #

With the exception of Constant Value, any of these operands may be used to contain the output value.

The functions are located under the Logic menu on the Ladder toolbar.