Chapter Outline
13.1 Introduction
13.2 Logic Gate Instructions
13.3 Shift Left Instruction
13.4 Shift Right Instruction
13.5 LogixPro Simulator Examples
Technical Terms
bit shift left (BSL) instruction
bit address
length
PLC Logic and Bit Shift
Instructions
Chapter 13
control register (R6)
reset (RES) instructions
bit shift right (BSR) instruction
Learning Objectives
After completing this chapter, you will be able to:
• Use the NOT instruction in PLC ladder logic diagrams.
• Use the AND instruction in PLC ladder logic diagrams.
• Use the OR instruction in PLC ladder logic diagrams.
• Use the XOR instruction in PLC ladder logic diagrams.
• Program the NOT instruction with AND, OR, and XOR
instructions to create NAND, NOR, and XNOR instructions.
• Create a PLC ladder logic diagram that uses the bit shift left
(BSL) instruction.
• Create a PLC ladder logic diagram that uses the bit shift right
(BSR) instruction.
• Open a data file bit dialog box to monitor the operation of a bit
shift right or a bit shift left instruction.
• Reset the bit shift left or the bit shift right instruction to its
starting bit position.
13.1 Introduction
In Chapter 7, you learned how to create PLC ladder logic diagrams
to perform operations of digital logic gates. These logic gates you
explored were the NOT, AND, NAND, OR, NOR, XOR, and XNOR.
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