Download presentation
Presentation is loading. Please wait.
Published bySteven Tustin Modified over 10 years ago
1
Copyright © 2002 Delmar Thomson Learning Chapter 11 Processor Data Organization
2
Copyright © 2002 Delmar Thomson Learning Objectives Describe a processor file. Explain what two files make up a processor file. Explain the function of a program file. Explain the function of a data file. List the contents of a program file.
3
Copyright © 2002 Delmar Thomson Learning Objectives (cont’d.) Explain the contents of a bit file. Explain how a bit file is made up. Explain the contents and makeup of an integer file.
4
Copyright © 2002 Delmar Thomson Learning Objectives (cont’d.) Explain what an element and a sub- element are. List which instructions have multiple word elements. Describe what status bits are and where they are used.
5
Copyright © 2002 Delmar Thomson Learning Project File Terms Project: The collection of the ladder program and all associated information. Processor file: Contains all information that is downloaded into the processor. The processor file contains program files and data files.
6
Copyright © 2002 Delmar Thomson Learning Project File Terms (cont’d.) Program files: Program files are ladder files. The SLC 500 can contain up to 256 ladder files. Data files: Data files contain data associated with the ladder file(s). The SLC 500 can contain up to 256 data files.
7
Copyright © 2002 Delmar Thomson Learning Project File Terms (cont’d.) Database files: Database files contain ladder documentation file data.
8
Copyright © 2002 Delmar Thomson Learning RSLogix 500 Project Tree The RSLogix 500 software stores all project files in the project tree. File is a group of related elements. Project tree is similar to a table of contents.
9
Copyright © 2002 Delmar Thomson Learning RSLogix 500 Project Tree
10
Copyright © 2002 Delmar Thomson Learning Processor Memory Is Like a Two-Drawer File Cabinet
11
Copyright © 2002 Delmar Thomson Learning Program Files in Their Separate File Drawer
12
Copyright © 2002 Delmar Thomson Learning Data Files Stored in Their Separate Drawer
13
Copyright © 2002 Delmar Thomson Learning SLC 500 Default Data Files When a new project is created, the software creates data files 0 through 8. Each file has a file identifier and a file number. A file is a group of related elements. The file identifier and file number make up part of the data stored in the files address.
14
Copyright © 2002 Delmar Thomson Learning SLC 500 Default Data Files
15
Copyright © 2002 Delmar Thomson Learning SLC 500 Default Data Files (cont’d.) Each file contains specific information needed by the processor in order to complete its job of executing the user ladder program. Default data files are organized as follows:
16
Copyright © 2002 Delmar Thomson Learning File 0, Output Status File Made up of single bits grouped into a 16-bit word. Each bit represents the on or off state of one output point. There is one output word reserved for each output module in your SLC 500 system.
17
Copyright © 2002 Delmar Thomson Learning File 0, Output Status File (cont’d.) File identified as file O. Bit identifiers across top of file represent discrete output screw terminal designation. Address format O:2.0. O identifies output file type. 2 identifies output module in chassis slot 2. .0 identifies word zero.
18
Copyright © 2002 Delmar Thomson Learning SLC 500 Output Status File
19
Copyright © 2002 Delmar Thomson Learning File 1, Input Status File Made up of single bits grouped into a 16-bit word. Each bit represents the on or off state of one input point. There is one input word reserved for each input module in your SLC 500 system.
20
Copyright © 2002 Delmar Thomson Learning File 1, Input Status File (cont’d.) File identified as file 1. Bit identifiers across top of file represent discrete output screw terminal designation. Address format I:3.0. I identifies output file type. 3 identifies input module in chassis slot 3. .0 identifies word zero.
21
Copyright © 2002 Delmar Thomson Learning SLC 500 Input Status File
22
Copyright © 2002 Delmar Thomson Learning SLC 500 Input Status File (cont’d.) Only words in the output and input status files are created for I/O modules that actually exist in the SLC 500 system. Output and input status file word creation is part of the I/O configuration process.
23
Copyright © 2002 Delmar Thomson Learning B3, Binary or Bit File The binary or bit file stores single bit data. Binary file also referred to a internal coil, internal relay storage. Internal bits are used to store internal data. Identified as file B3.
24
Copyright © 2002 Delmar Thomson Learning Each Bit File Element Consists of One 16-Bit Word
25
Copyright © 2002 Delmar Thomson Learning T4, Timer File The timer file stores only timer elements. An element is a word or group of words that work together as a unit. A timer is made of three pieces or words: Preset value Accumulated value Status bits
26
Copyright © 2002 Delmar Thomson Learning T4, Timer File (cont’d.) The preset value and accumulated value are 16-bit signed integers. Status bits are single bits that make up one 16-bit word. These three words work together as a unit.
27
Copyright © 2002 Delmar Thomson Learning One Timer Element Is Made of Three 16-Bit Words
28
Copyright © 2002 Delmar Thomson Learning Timer Addressing Sample timer element addressT4:2 T4 = timer file 4 :2 = timer element #2 (0-255 timer elements per file)
29
Copyright © 2002 Delmar Thomson Learning Sub-Element A sub-element is part of an element addressable as a unit. The preset value and accumulated value are sub-elements of a timer. T4:0.PRE T4:0.ACC
30
Copyright © 2002 Delmar Thomson Learning Timer Status Bits Timers have three status bits. Done bit (DN) is true when the accumulated value and preset are equal. Timer timing bit (TT) is true when the timer is timing. Enable bit (EN) is true when the timer instruction is enabled or true.
31
Copyright © 2002 Delmar Thomson Learning Timer Bit Addressing Status bit addresses for timer file 4, timer element 2 (T4:2) are listed below: T4:2/DN is the address for the done bit. T4:2/EN is the address for the enable bit. T4:2/TT is the address for the timer timing bit.
32
Copyright © 2002 Delmar Thomson Learning Timer File T4
33
Copyright © 2002 Delmar Thomson Learning C5, Counter File The counter file stores only counter elements. An element is a word or group of words that work together as a unit. A counter is made of three pieces or words: Preset value Accumulated value Status bits
34
Copyright © 2002 Delmar Thomson Learning C5, Counter File (cont’d.) The preset value and accumulated value are 16-bit signed integers. Status bits are single bits that make up one 16-bit word. These three words work together as a unit.
35
Copyright © 2002 Delmar Thomson Learning One Counter Element Is Made of Three 16-Bit Words
36
Copyright © 2002 Delmar Thomson Learning Counter Addressing Sample counter element address C5:2 C5 = timer file 5 :2 = counter element #2 (0-255 timer elements per file)
37
Copyright © 2002 Delmar Thomson Learning Sub-Element A sub-element is part of an element addressable as a unit. The preset value and accumulated value are sub-elements of a counter. C5:0.PRE C5:0.ACC
38
Copyright © 2002 Delmar Thomson Learning Counter Status Bits Counter has five status bits. Done bit (DN) is true when the accumulated value and preset are equal. Count up enable bit (CU) is true when the up counter is true or enabled. Count down enable bit (CD) is true when the count down counter is enabled or true.
39
Copyright © 2002 Delmar Thomson Learning Counter Status Bits (cont’d.) The overflow bit (OV) is true when the up counter has overflowed above +32767. The underflow bit (UN) is true when the down counter has underflowed below -32768. The update accumulator bit (UA) is a high- speed counter status bit for fixed SLC 500 PLCs.
40
Copyright © 2002 Delmar Thomson Learning Counter Status Bit Addressing Status bit addresses for counter file 5, counter element 0 (C5:0) are listed below: C5:0/DN is the address for the done bit. C5:0/CU is the address for the count up enable bit.
41
Copyright © 2002 Delmar Thomson Learning Counter Status Bit Addressing (cont’d.) C5:0/CD is the address for the count down enable bit. C5:0/OV is the address for the count up overflow bit. C5:0/UN is the address for the count down underflow bit.
42
Copyright © 2002 Delmar Thomson Learning Counter File C5
43
Copyright © 2002 Delmar Thomson Learning R6, the Control File The control file is used to store status information for Bit shift First in and first out stacks (FIFO) Last in and first out stacks (LIFO) Sequencer instructions Certain ASCII instructions
44
Copyright © 2002 Delmar Thomson Learning One Control Element Is Made of Three 16-Bit Words
45
Copyright © 2002 Delmar Thomson Learning N7, Integer File The integer file stores a 16-bit signed integer representing a whole number. Integer file data range –32,768 to +37,767. Integer file has no status bits. Each integer file can have 0 to 255 integer elements.
46
Copyright © 2002 Delmar Thomson Learning Integer File Element Consists of 16-Bit Elements
47
Copyright © 2002 Delmar Thomson Learning F8, Floating Point File Storage of fractional numerical data or values greater than 32767. Data range of 1.1754944e-38 to 3.40282347e+38. Floating point file is processor operating system dependant. Must have 5/03 modular processor with OS 301 or above, 5/04 or 5/05 processor.
48
Copyright © 2002 Delmar Thomson Learning Floating Point File Data Representation
49
Copyright © 2002 Delmar Thomson Learning User-Defined Data Files Default files are data files 0 through 8. Total of 256 data files if processor will support them. Each data file can have up to 256 elements if processor supports them and has enough memory. Files greater than file number 8 are user defined files.
50
Copyright © 2002 Delmar Thomson Learning User-Defined Data Files User-defined files are data files the user can create and define as needed for specific applications. Cannot create additional output, input, or status files.
51
Copyright © 2002 Delmar Thomson Learning SLC 500 User-Defined Files
52
Copyright © 2002 Delmar Thomson Learning Review of SLC 500 Data Files
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.