Copyright © 2002 Delmar Thomson Learning Chapter 11 Processor Data Organization

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.

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.

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.

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.

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.

Copyright © 2002 Delmar Thomson Learning Project File Terms (cont’d.)  Database files:  Database files contain ladder documentation file data.

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.

Copyright © 2002 Delmar Thomson Learning RSLogix 500 Project Tree

Copyright © 2002 Delmar Thomson Learning Processor Memory Is Like a Two-Drawer File Cabinet

Copyright © 2002 Delmar Thomson Learning Program Files in Their Separate File Drawer

Copyright © 2002 Delmar Thomson Learning Data Files Stored in Their Separate Drawer

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.

Copyright © 2002 Delmar Thomson Learning SLC 500 Default Data Files

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:

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.

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.

Copyright © 2002 Delmar Thomson Learning SLC 500 Output Status File

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.

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.

Copyright © 2002 Delmar Thomson Learning SLC 500 Input Status File

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.

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.

Copyright © 2002 Delmar Thomson Learning Each Bit File Element Consists of One 16-Bit Word

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

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.

Copyright © 2002 Delmar Thomson Learning One Timer Element Is Made of Three 16-Bit Words

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)

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

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.

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.

Copyright © 2002 Delmar Thomson Learning Timer File T4

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

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.

Copyright © 2002 Delmar Thomson Learning One Counter Element Is Made of Three 16-Bit Words

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)

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

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.

Copyright © 2002 Delmar Thomson Learning Counter Status Bits (cont’d.)  The overflow bit (OV) is true when the up counter has overflowed above  The underflow bit (UN) is true when the down counter has underflowed below  The update accumulator bit (UA) is a high- speed counter status bit for fixed SLC 500 PLCs.

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.

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.

Copyright © 2002 Delmar Thomson Learning Counter File C5

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

Copyright © 2002 Delmar Thomson Learning One Control Element Is Made of Three 16-Bit Words

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.

Copyright © 2002 Delmar Thomson Learning Integer File Element Consists of 16-Bit Elements

Copyright © 2002 Delmar Thomson Learning F8, Floating Point File  Storage of fractional numerical data or values greater than  Data range of e-38 to e+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.

Copyright © 2002 Delmar Thomson Learning Floating Point File Data Representation

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.

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.

Copyright © 2002 Delmar Thomson Learning SLC 500 User-Defined Files

Copyright © 2002 Delmar Thomson Learning Review of SLC 500 Data Files