[reprint]rslogix 5000 instance tutorial

RSL 5K Junior course

Original address ：RSLOGIX 5000 Example tutorial author ： Shenying is like water

The software is introduced

RSLOGIX5000 Time America AB Developed by the company for use in PLC Software for product programming . It has the following characteristics ：1 Unified project view

2    Flexible ladder editor

3    Drag and drop operations

4    Ladder view options

5    Custom data monitoring

6    Status file classification display

7    Simple communication configuration

8    Powerful database editor

9    Find and replace

10  Intuitive windows Interface

11  Project verification can quickly correct program errors, etc .

          Create a project

How to use RSLogix5000, First create a new RSLogix5000 Engineering documents . The specific steps are as follows ：1 open RSLogix5000, See the picture 1-1

                                    chart 1-1

The open window is RSLogix5000 The engineering of , See the picture 1-2：

First you have to give PLC Processor definition for , The defined content has a name 、 type 、 The back plate of the rack Slot No 、 Created file path, etc . The processor type here is 1756 L1 controllogix 5550, Name a PLC,description Set it as an exercise , The backplane is set as 13 Slot , Slot No 0 Slot , Path default .

                              chart 1-2

  Click on ok Complete set , Show RSLogix5000 Engineering interface

1.  First put forward tag( label ) The concept of , label ： It is the variable in the actual project , There are analog quantities such as water level 、 pressure 、 temperature . Digital quantity such as switch start and stop 、 Status display, etc . We use it in our programs to program , View status online in the window , The tag value can also be output to the upper computer .

2.  Label type

One base Basic types include ： 1  BOOL  Boolean type  1 BIT

2  SINT  Short   1 BYTE

3  INT   integer     2 BYTE

4    DINT Double integer   4 BYTE

5    REAL Real type      4 BYTE

  Two STRUTURES Type of structure 1  predefined Scheduled to type

chart 1-3

User-defined User defined ： This example uses the custom PUMPPARAMETERS For example Define the structure members as ACCTIME,RUNTIME,SEQUENCE,STATUS,FIRSTPUMP, And determine their respective types .

chart     1-4

Users can use tag names to refer to members in the structure , The format is ：tag_name.member_name.

If the structure is defined as an array , Then use the array label , This is followed by the position in the array （position）

And substructures （substucture） And member name （member）. The format is ：array_tag[position].member.

The following introduces the concept of alias label ： A label used to represent other labels , Useful when defining simplified label names for structural elements or arrays . Users can use the tag editor to create an alias , Or before you enter logic and use new tags （new tag） Dialog box to define an alias, enter the alias label . See the picture 1-5

                 chart 1-5

1． In the tag editor, select the tag that needs to be aliased to alarm For example Can be directly in alias Enter alias under , You can also right click in the blank , Select from the pop-up menu edit tag properties,

chart 1-6

Label scope ： Users can group tags in a separate program , Or make the label open to the instruction within the controller . When a user defines a label , You need to specify that the tag is used as the program tag （ Local ） Or as a controller label （ overall situation ）.

1 The local scope label in the program

  Program labels are composed of data that is restricted to routines within the main program . So for the main program , These labels make local . A routine in another program cannot access a program tag in another program .

  chart   1-7

2 Global scope label of the controller

The controller tag is composed of data applicable to all routines in the controller , Whatever task or program contains these routines . For control , These labels are global .

                          chart 1-8

 

Development procedure

1 Tissue engineering

  The controller operating system is a preemptive multitask system , follow IEC1131-3 standard . This work platform can provide ：1 Multitasking is used to configure the controller to execute ;

2 Programs are used to combine data and logic ;

3 Routines are used to encapsulate executable code written in a programming language .

2 Define the task

  A task can provide scheduling and priority information for one or more groups of programs , These procedures are performed according to specific standards , The user can configure the task in continuous mode or periodic mode

 

Task type	LOGIX5550 The total number of tasks supported by the controller
Continuous mode	1
Cycle mode	If it includes a continuous task, the controller supports a total of 31 A mission , No is 32 A mission

 

Each task in the controller has a priority . When multiple tasks are triggered , The hype system is more wired to decide which task to perform . For periodic tasks , Yes 15 Configurable priority levels , It ranges from 1-15, among 1 Have the highest priority and 15 Has the lowest priority . High priority tasks have the right to interrupt lower priority tasks . Continuous tasks have the lowest priority , Therefore, it can be interrupted by periodic tasks at any time .

A task can have at most 32 A separate program , Each program has its own executable routine and program scope label （program-scoped tags）. Once a task is triggered （ To be activated ）, Then all the programs assigned to the task will be executed according to their grouping order . The program can only appear once in the project manager of the controller , And cannot be shared by multiple tasks .

Each task has a watchdog timer , Used to monitor the execution of tasks . When the task starts , The watchdog timer starts timing , When all the procedures in the task are completed , The watchdog timer stops .

Here is how to create a task

When the user RSLogix5000 When opening a new controller project in , Main task （Maintask） Has been defined as a continuous task . Users can change the default task type to suit their project .

  chart 2-1

Right click... In the above figure tasks, choose new task , The above dialog box pops up .

name	Enter task name
Description( explain )	Enter a description of the task
type	Choose continuous （continuous） Or cyclical （periodic）, Control only supports 1 Consecutive tasks .
Watchdog( watchdog )	Default 500 millisecond
Priority( priority )	1-15
Rate	For recurring tasks , Indicates how fast the controller is performing tasks

 

3 Define the program

  Each program contains a program label 、 An executable main routine 、 Other routines and an optional fault routine . Each task can be scheduled at most 32 Procedures .

  The program scheduled in the task will run from the first program to the last program . Programs that do not belong to any task will be displayed as bit scheduling programs . Before the controller can scan a program , The user must specify the program in the task .

 

The following describes how to create a program . When the user opens a new project in the editing software , The main task has been （maintask） A main program is defined （mainprogram）. Users can change this program just as they add other programs .

  To create a new program ：

1 Choose a task （ For this example “maintask”）

2 Click the right mouse button , choice new program See the picture below 2-2

The following dialog box will pop up

        chart 2-3

  Above picture schedule in ( Scheduled on ) Define the tasks of the user scheduler . The programming software will display a list of available tasks .

 4 Define routines

  A routine is a set of logic instructions written in a programming language . For example, ladder logic . Routines provide executable code for projects in the controller . Routines are similar to plc or slc A program file or subroutine of a processor instance .

  Each program has a main routine . When the controller starts the associated task and invokes the associated program , The process of first implementation in major cities . Other routines can be called with logic , for example JSR Instructions .

  The user can also develop an optional program fault routine . When the controller encounters instruction execution failure in the course of the associated program （instrution-execution fault） when , The controller executes the specified fault routine .

Here's how to create a routine

When the user opens a new project in the editing software , Has been the main program （mainprogram） Defines a main routine （mainroutine）. The user can change the main routine just like adding other programs .

To create a new routine ：

1  1 Select a program （ For this example “mainprogram”）

2 Click the right mouse button , choice new routine See the picture below 2-3

chart 2-3

  The following dialog box will pop up

chart 2-4

  In the diagram above in program ( Program ) Define the program that the user plans to run the routine . The programming software will display a list of available programs .

5   Input ladder logic

logix5550 The controller supports the format that each step in the logic program contains multiple output instructions . The output instructions in the rung can be arranged in order （ Series connection ） Or mixed input and output instructions , As long as the last instruction in the rung is an output instruction .

The controller according to the step condition before the command （ Step input conditions ） To determine the ladder instruction . Input conditions and instructions according to the steps , The controller sets the step condition following the command （ Step input conditions ） Then follow the order of instructions , Will affect subsequent instructions .

  chart 2-5

  If the step input condition of an input command is true （true）, This controller will determine the command and set the step input condition according to the command result . If the instruction is determined to be true ; If the instruction is false （false）, This step output condition is false .

The output command does not change the step output condition . If the step input condition of an output command is true , Then the step output condition will be set to true . If the step input condition of an output command is false , The step output condition will be set to false .

Input branch ： There are no restrictions on the maturity of parallel branches supported by the controller . The figure below shows an example that contains 5 Parallel branch of layer . The main level is the first branch layer , Behind a 4 Additional branches .

chart   2-6

  The maximum number of edges you can nest is 6 layer . The following illustration shows a nested edge . The output instruction at the bottom is located in the with 3 Nested edge of layer depth .

                        chart    2-7