Flashcards
Basics Of Plc Programming
Flashcards do conjunto (24)
- 1two general categories of memoryProgram Files
Data Files ( or tables) - 2DATA FILESInput/output locations, internal relays/ timer and counter functions
- 3User programcauses the controller to operate in a particular manner
- 4house keeping memoryused to carry out functions needed to make the process operate
- 5Program fileswhere the user program is stored, and typically accounts for the majority of systems memory.
- 6Program Files are broken down in the following sections:System Functions
Reserved
User Program (Main)
Sub-routines - 7System FunctionsContains user entered data such as processor type, I/O config., processor filename, and password.
- 8ReservedMemory reserved for processor operation
- 9User Program (Main)User entered ladder logic
program. - 10Sub-routines:User created sub-routines utilized by main ladder logic program.
- 11program files are broke intooutput
input
status
bit
timer
counter
integer
reserved - 12Output (File 0)Stores current state of PLC output terminals
- 13InputStores current state of PLC input terminals
- 14StatusUsed to store information about controller operation.
- 15Bit/Binarythe bit (or binary) file is used to store information tied to internal relay logic instructions.
- 16TimerThis file stores information related to timing instructions. The data file includes the state of the control bits, as well as the values of the preset and accumulated words.
- 17Counterhis file stores information related to counter instructions. This information includes the status of the control bits, as well as the values of the preset and accumulated words.
- 18Control (File 6)This file is used to store data related to specific instructions such as bit shift registers and sequencers
- 19IntegerThis file is used for storing numerical data and/or bit information. numbers can range from -32,767 to +32,767, and are displayed decimal format.
- 20Average scan time ranges1mS, to 20mS
- 21I/O SCANrecords status data of input devices, energizes output devices
- 22Allen-Bradley scaneach rung in a horizontal
- 23Modicon scanuse a vertical, column based scan method.
- 24Programming languagesLadder Diagram Language
-Boolean Language
Sequential Function Chart