Rockwell-automation Logix5000 Controllers Add-on Instructions Programm Manuel d'utilisateur Page 58
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Chapter 2 Defining Add-On Instructions
If any parameters or tags become unverified due to the change of class, they are
identified on the Parameters and Local Tags tabs of the Add-On Instruction
Editor.
If any of the restrictions for safety Add-On Instructions are violated by changing
the class from standard to safety, one of the following errors is displayed and the
change does not succeed:
• Routines must be of Ladder Diagram type.
• Safety Add-On Instructions do not support the Postscan routine.
• One or more parameters or local tags have an invalid data type for a safety
Add-On Instruction.
You must edit the parameter, tag, or routine types before the class change can be
made.
Tip: If the safety controller project contains safety Add-
On Instructions, you must remove them from the project
or change their class to standard before changing to a standard controller type.
You need to test and troubleshoot the logic of an instruction to get it working.
Tip: When a fault occurs in an Add-On Instruction routine, a fault log is created that contains extended
information useful for troubleshooting.
Before you test
Before you start to test an Add-On Instruction, do the following.
1. Open a project to debug offline.
Tip: Add-On Instructions can only be created or modified when offline. You can add, delete, or modify tag
arguments in calls to Add-On Instructions while editing online, but you cannot edit arguments inside the
Add-On Instruction while online.
2. Add the Add-On Instruction to the project, if it is not already there.
Testing the flow
1. Add a call to the instruction in a routine in the open project.
2. Assign any arguments to required parameters for your call.
3. Download the project.
Testing the Add-On
Instruction
58 Rockwell Automation Publication 1756-PM010F-EN-P - October 2014
- Programming Manual 1
- Important user information 2
- Summary of changes 3
- Table of contents 5
- Chapter 2 6
- Chapter 3 7
- Chapter 4 7
- Using Add-On Instructions 7
- Importing and Exporting 7
- Add-On Instructions 7
- Table of Contents 8
- Preface 9
- Studio 5000 environment 9
- Additional resources 9
- Understanding terminology 10
- Chapter 1 13
- Introduction 13
- About Add-On Instructions 13
- Components of an Add-On 14
- Instruction 14
- Local tags 16
- Parameters 16
- Data Type 17
- Logic routine 18
- Optional Scan Modes routines 19
- Instruction signature 19
- Signature history 20
- Change history 21
- Considerations for Add-On 22
- Instructions 22
- Safety Add-On Instructions 23
- Safety instruction signature 24
- Programming languages 24
- Transitional instructions 25
- Instruction size 25
- Runtime editing 26
- Nesting Add-On Instructions 26
- Programmatic access to data 28
- ’this’ as the Instance Name 29
- Considerations when 30
- Data access control 34
- Constant values 35
- External Access 35
- Planning your Add-On 36
- Instruction design 36
- Naming conventions 37
- Source protection 37
- Nesting - reuse instructions 37
- Scan mode routines 38
- Help documentation 38
- Defining Add-On Instructions 39
- Creating a parameter 40
- Creating a module 42
- Creating local tags 44
- Editing parameters and 45
- Updates to arguments 46
- Copying parameter or local 47
- Creating logic for the 48
- Add-On instruction 48
- Defining operation in 49
- Enabling scan modes 50
- Prescan routine 51
- Postscan routine 53
- EnableInFalse routine 54
- Using the EnableIn and 56
- EnableOut parameters 56
- Changing the class of an 57
- Add-On Instruction 57
- Testing the Add-On 58
- Defining source protection 60
- Generating an Add-On 61
- Creating instruction help 63
- Project documentation 66
- Motor starter instruction 67
- Example Definition Editor 68
- Simulation instruction 71
- Ladder diagram configuration 72
- Including an Add-On 77
- Instruction in a routine 77
- Referencing a hardware 79
- Tips for using an Add-On 81
- Programmatically access a 81
- Starter Add-On Instructions 82
- Monitoring the value of a 84
- Viewing logic and monitor 85
- Determine if the Add-On 87
- Instruction is source 87
- Copying an Add-On 88
- Storing your Add-On 89
- Creating an export file 91
- Exporting to a single file 93
- Importing an Add-On 94
- Import configuration 95
- Updating an Add-On 96
- Instruction to a newer 96
- Rockwell Automation support 104
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