Bradley Smoker PLC-5 user manual Controller memory is divided into two basic areas

4-10Addressing I/O and Controller Memory

Understanding PLC-5 Controller Memory

Controller memory is divided into two basic areas:

Storage Areas	Description
Data	All of the data the controller examines or changes is stored in files in data
	storage areas of memory. These storage areas store:
	•	Data received from input modules
	•	Data to be sent to output modules; this data represents decisions made
		by the logic
	•	Intermediate results made by the logic
	•	Preloaded data such as presets and recipes
	•	Control instructions
	•	System status
Program Files	You create files for program logic, depending on the method you are using:
	ladder logic, sequential function charts, and/or structured text. These files
	contain the instructions to examine inputs and outputs and return results.

Publication 1785-UM012D-EN-P - July 2005