Data Manipulation 360
This class explains basic data moving functions and describes how and why these functions are used.
Number of Lessons 16
- What Is Data Manipulation?
- Instruction Parameters for Data Manipulation
- Types of Data Move
- The Move Instruction
- Using the Move Instruction
- Block Move
- Table and Register Moves
- The Masked Move Instruction
- The Copy Instruction
- Using the Copy Instruction
- Brand-Specific Data Moves
- Stacking Functions
- PLC Types
- Define data manipulation.
- Describe PLC registers.
- Identify instruction parameters for data manipulation.
- Describe the types of data moves.
- Describe the Move instruction.
- Explain how the Move instruction is used.
- Describe Block Move.
- Describe table and register moves.
- Describe the masked move instruction.
- Describe the copy instruction.
- Describe how the copy instruction is used.
- Identify brand-specific data moves.
- Describe stacking functions.
- Describe different types of PLC.
A function that moves data from two or more consecutive registers to a new consecutive location, keeping all the data in the same order. Also known as a file-to-file transfer.
block transfer read
A move function that immediately moves a real-world input into an input register. Found on SLC Allen Bradley PLCs.
block transfer write
A move function that tells the processor to write data from a stored register to a new location. Found on Allen Bradley PLCs.
control block length
The parameter that controls the number of registers to be moved in a Block Move function.
A process of altering register data so as to change output status, without altering the ladder program.
The register location where data are moved or copied. The destination is where the information is going.
The most common stacking function that unloads data in the same order it was received. FIFO stands for "first in, first out."
A data register in a PLC that stores bits of information. Files are often referred to as registers.
A function that moves data from two or more consecutive registers to a new location of consecutive registers, keeping all the data in the same order. Also known as a Block Move.
A move function that also instructs the processor to repeat the same move on a set basis. Found on Cutler-Hammer PLCs.
A means of data manipulation that copies data from one register. Get/Put is another name for Move.
indirect block read
A move function that tells the processor to immediately update specified registers without waiting to be scanned. Found on Modicon PLCs.
indirect block write
A move function that copies a block of data to specified nonconsecutive registers. Found on Modicon PLCs.
The information that specifies the number of words that will be transferred during data manipulation.
A less common stacking function that unloads data in the opposite order that it was received. LIFO stands for "last in, first out."
A filter that hides certain specified bits so that they will not be acknowledged as moved.
masked move instruction
A type of data move that tells the processor to ignore certain specified bits after they have been moved.
A means of data manipulation that copies data from one register to another register. The Move function copies over data within the entire word, which is typically 16 bits.
A data file in a PLC that stores bit files.
A type of data move that takes one consecutive block of data from a register and copies it to various nonconsecutive individual registers. Any number of individual bits can be copied, but the total is limited by the size of the register, which is typically 16 bits.
The original register location of data to be moved or copied. The source is where the information originates.
A method of data manipulation that allows you to organize data relative to time and priority.
A data register in a PLC that stores bits of information. The term "table" is used in place of files or registers in some PLCs.
A type of data move that collects bits from nonconsecutive registers and copies them into one consecutive block of data. Any number of individual bits can be copied, but the total is limited by the size of the register, which is typically 16 bits.
A set of PLC instructions that automatically starts or stops machines and other devices when a preset time period has been exceeded.
A 16-bit unit of data that corresponds to an I/O group and stores I/O values.