Page 226 - Programmable Logic Controllers, Fifth Edition - Mobile version

10

Data Manipulation

Instructions

Ladder logic program
Lime 1 B3:0/0
L1 Inputs COP
OSR COPY FILE
Source #N12:0
Destination #N7:50
Length 5
Lime 1
Cola 2 Cola 2 B3:0/1 COP
Cherry 3 OSR COPY FILE
Source #N12:5
Destination #N7:50
1 Length 5
2
Cherry 3
B3:0/2 COP
3
OSR COPY FILE
Selector switch Source #N12:10
Destination #N7:50
Length 5

Chapter Objectives

After completing this chapter, you will be able to: Data manipulation involves transferring data and
operating on data with math functions, data con-
• Execute data transfer of word and file level instructions
from one memory location to another versions, data comparison, and logical opera-
• Interpret data transfer and data compare instructions as tions. This chapter covers both data manipulation
they apply to a PLC program instructions that operate on word data and those
• Compare the operation of discrete I/Os with that of that operate on file data, which involve multiple
multibit and analog types words. Data manipulations are performed inter-
• Understand the basic operation of PLC closed-loop nally in a manner similar to that used in micro-
control systems computers. Examples of processes that need
these operations on a fast and continuous basis
are studied.

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