7492215
Description
Flashcards by Orlando Banks, updated more than 1 year ago
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Created by Orlando Banks
almost 8 years ago
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| Question | Answer |
| two general categories of memory | Program Files Data Files ( or tables) |
| DATA FILES | Input/output locations, internal relays/ timer and counter functions |
| User program | causes the controller to operate in a particular manner |
| house keeping memory | used to carry out functions needed to make the process operate |
| Program files | where the user program is stored, and typically accounts for the majority of systems memory. |
| Program Files are broken down in the following sections: | System Functions Reserved User Program (Main) Sub-routines |
| System Functions | Contains user entered data such as processor type, I/O config., processor filename, and password. |
| Reserved | Memory reserved for processor operation |
| User Program (Main) | User entered ladder logic program. |
| Sub-routines: | User created sub-routines utilized by main ladder logic program. |
| program files are broke into | output input status bit timer counter integer reserved |
| Output (File 0) | Stores current state of PLC output terminals |
| Input | Stores current state of PLC input terminals |
| Status | Used to store information about controller operation. |
| Bit/Binary | the bit (or binary) file is used to store information tied to internal relay logic instructions. |
| Timer | This 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. |
| Counter | his 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. |
| Control (File 6) | This file is used to store data related to specific instructions such as bit shift registers and sequencers |
| Integer | This 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. |
| Average scan time ranges | 1mS, to 20mS |
| I/O SCAN | records status data of input devices, energizes output devices |
| Allen-Bradley scan | each rung in a horizontal |
| Modicon scan | use a vertical, column based scan method. |
| Programming languages | Ladder Diagram Language -Boolean Language Sequential Function Chart |
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