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| Allen Bradley SLC + DeviceNet |
Thursday Nov 20th, 2008 |
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| Course Title |
Allen Bradley SLC + DeviceNet |
| Software |
RSLogix + RSNetworx |
| PLC-Type |
SLC500 PLC and DeviceNet |
| Duration |
5 days |
| Pre-Requisites |
Ideally previous PLC experience not suitable for absolute beginner |
| Maximum Delegates |
4 |
| Prices |
Click here for prices |
Brief Description
Be able to recognise DeviceNet hardware and be able to replace modules when a fault occurs. Be able to operate the RSNetworx software to make it perform certain tasks. Understand basic concept of nodes, commissioning, scanner cards , scan list, addressing etc and communications with the PLC Be able to replace DeviceNet nodes when required. Be able to perform basic system diagnostics when a problem occurs |
Course Documentation
- Training Log
- Pre Course Exercises
- Course Exercises
- Post Course Exercises
- Filofax Pocket Reference Guides
- DeviceNet Course Notes
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Course Content
To fault find a system you need to know EXACTLY how it works HOW EXACTLY DOES A PLC WORK? -
Am I getting the input to the PLC? -
The Led on the output card means i am getting voltage out right? does it? -
What exactly happens in between? ,theres more than just a program in the CPU -
How exactly does it scan the program? -
What is this Watchdog Timer? Is it that important? -
Can I use the same output twice? That's bad programming isn't it? -
A PLC is a logic controller, so use a logical approach to fault find it. -
What are the 8 simple test points to check? -
The PLC is in RUN, that means theres a program right? does it? -
FORCING a bit and toggling a bit is pretty much the same yeah? depends on which PLC Then you need to Know the specifics HOW DO I DO THE FOLLOWING? (some straight forward some not so) - Check power is ON and PLC is in right mode (RUN or Program)
- Check LEDs for fault definition
- Check and Change Modules if required (with spares and without spares)
- System connection
- Establish link to PLC (RSLinx, a major problem area these days)
- Create a blank project and take a backup (just in case I mess up)
- Open the correct project Off Line and link to PLC
- Interrogate errors in Status table
- Identify if it is a hardware or software fault?
- Identify if it is a PLC or Comms fault
- Change the battery
- Check all settings against a template, Node Address etc.
- Check Hardware Configuration
- Clear Memory and Download program
- Check software against latest copy (Compare function)
- Monitor program
- Searching for specific operands and instructions
- Changing timer, counter values On Line
- Making minor mods Off Line and On line
- Check or create a Custom Monitor table to establish parameter status
- Create a Histogram to monitor address transitions
- Creat a Trend to trend address status or values
- Altering timer, counter and other data table values if required
- Force a parameter if required
- Toggling addresses to move program on in sequence
- Call up documentation to assist with software diagnostics
- Printing Cross Reference / Program Listings etc.
Configuration of DeviceNet Network Basic communications, RS 232, baud rates etc. Refresher on RS Linx Connecting Communications Cables Configuring Scanner Card Understanding LED indications Understanding error mesages Power requirements Configuring Devices using RS Networx Online and Offline modes Saving Configurations Programming within the SLC 500 Reading and writing information to and from the PLC Addressing of the Nodes on the Network Node commissioning EDS devices and libraries Replacement of faulty input/ output cards Replacement of faulty devices Generation of documentation to assist fault finding Background information also covered Understanding of the following: - Number formats, bits,words,
- Binary, floating point, integer
- Program blocks and Data Tables, B3, T4, N7 etc
- How to monitor various blocks
- Understand basic Ladder programs
- Basic Instructions, contacts, Set, reset etc.
- Timers, Counters
- Comparators, Maths
- Altering values in a data table
- Toggling v Forcing
- Back tracking through a program to establish where power flow stops
- Overall reset procedure
- Fault finding tips
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Course Equipment Per Delegate
- SLC500 PLC
- DeviceNet Network
- PC or Laptop
- Simulator
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