Industrial Engineer · phase 4 of 16
Move / Copy
Instructions that transfer a value or block of data without changing the source.
The Explain card
- Plain English
- A move puts one value into another tag, and a copy moves a whole block of memory from one place to another. The source stays as it was.
- Example
- A move writes the recipe's setpoint into the PID's setpoint tag when the operator confirms. A copy loads a whole recipe structure into the active recipe in one instruction.
- Why it matters
- A move on a rung that is always true overwrites the destination every scan, so an HMI entry into that tag lasts for one scan. A copy with a wrong length walks past the destination and rewrites whatever sits after it in memory.
- Hook
- Fast, silent, and happy to overwrite.
Where it sits in the deck
Phase 4: PLC Memory, Tags, and Instructions
The data a program moves and the instructions that move it, from a single true or false value up to a structured array.
