S5-100 / S5-115 PLC Level 1

Course Outline

Upon completion of the course the student should:

• Be able to recognise S5 hardware and be able to replace modules when a fault occurs.
• Be able to operate the S5 software to make it perform certain tasks.
• Understand basic S5 instruction set and be able to make minor modifications to software.
• Be able to backup and restore a PLC program when required.
• Be able to perform basic system diagnostics when a problem occurs.

Equipment per Delegate

• Siemens S5-100 or S5-115 PLC.
• PC or laptop.
• Simulator.
• 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?
• 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?
• Is forcing a bit and toggling a bit is pretty much the same?

How do I do the following?

• How do I check power is on and the PLC is in the right mode (RUN or Program).
• Check for a fault condition.
• Establish a link to the PLC (project settings).
• If comms problem check PG/PC interface.
• Create a blank project and take a backup.
• Open project for PLC and go online.
• Interrogate I Stack and B stack.
• Identify hardware / software faults.
• Change the battery.
• Change modules if necessary (with and without spares).
• Identify a PLC / comms fault.
• Check all settings against a template, etc.
• Check hardware.
• Clear memory and download program.
• Check software against latest copy (Compare function).