Quick Start Owner's manual
Table Of Contents
- 1756-QS001E-EN-P, Logix5000 Controllers Quick Start
- Summary of Changes
- Table of Contents
- 1 - Program and Test a Simple Project
- What You Need
- Before You Begin
- Follow These Steps
- Create a Project for the Controller
- Add Your I/O Modules
- Look at Your I/O Data
- Ladder Logic
- Enter a Function Block Diagram
- Assign Alias Tags for Your Devices
- Establish a Serial Connection to the Controller
- Download a Project to the Controller
- Select the Operating Mode of the Controller
- 2 - Organize a Project
- 3 - Program Add-On Instructions
- What You Need
- Follow These Steps
- Insert an Add-On Instruction
- Copy an Add-On Instruction Definition
- Import an Add-On Instruction Definition
- Access a Parameter That Is Not Visible
- Monitor or Change the Value of a Parameter of an Add-On Instruction
- View the Logic of an Add-On Instruction
- Edit and Monitor an Add-On Instruction
- Update an Add-On Instruction to a Newer Revision
- 4 - Program an Equipment Phase
- 5 - Program a Project Offline
- 6 - Document a Project
- 7 - Go Online to the Controller
- 8 - Program a Project Online
- 9 - Troubleshoot the Controller
- Index
- Back Cover
132 Publication 1756-QS001E-EN-P - October 2009
Chapter 7 Troubleshoot the Controller
A force overrides a value from an input device or logic.
• Forcing an input tag overrides the value from the input device.
• Forcing an output tag overrides your logic and sends the force value to the output device.
When forces are in effect (enabled), a appears next to the forced element.
The force indicator on the front of the controller and in the programming software indicates status.
If you want to Then
Override a value Install an I/O force (force an I/O value)
Stop an individual force but leave other forces enabled and in effect Remove an individual force
Stop all I/O forces but leave the I/O forces in the project Disable all I/O forces
If the indicator is Then
Off • No tags contain I/O force values.
• I/O forces are inactive (disabled).
Flashing amber • One or more tags contain a force value.
• I/O forces are inactive (disabled).
• When you enable I/O forces, all existing I/O forces take effect.
Solid amber • I/O forces are active (enabled).
• Force values may or may not exist.
• When you install (add) a force, it immediately takes effect.
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