Siemens S7 Maintenance

Sandton Centre Johannesburg South Africa


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Course overview:

Maintenance personnel are often confronted with equipment from several manufacturers. This course recognises that maintenance personnel cannot build up a profound technical knowledge of all the equipment to be maintained. One needs to have sufficient knowledge of the equipment, coupled with knowledge of the installation to be able to diagnose the problem and then solve the problem.

With regard to PLC’s and programming software, the maintenance engineer needs to be able to access specific parts of the program and to examine the I/O status. Programming and documenting the program is of less importance. The maintenance engineers should be capable of making small changes to the program.

Problems are most likely to occur with the installation itself and this is reflected in the PLC by for instance a defective sensor, a badly working cylinder etc. These faults can be investigated via the programming terminal and the signal status can be presented dynamically. This is necessary, because designers are not always able to design their programs to register every possible fault and the potential cause. 

The maintenance engineer should therefore be capable of executing the following actions:

  • To be able to identify if the PLC is still active and that there are no communication errors with the I/O or other coupled PLC’s.
  • To determine that the signal of the ‘suspected’ unit will show at the correct PLC reference. One should measure here with a universal meter.
  • To install and to start the programming software.
  • To make the internal I/O status of the signal visible:
    – to call the ‘suspected’ section in the program;
    – to make timer and counter files visible.
  • The maintenance engineer must be able to read the documentation, understand the structure of the PLC and be aware of the most commonly used PLC instructions.
  • To make links or to develop connections that changes the program conditions. Programming a counter and time measurement is desirable.

To make a backup of the changes made to the program. The maintenance engineer should also be capable of making an (original) backup of the program and be able to load it into the PLC.

Course Outline

  • Lesson 1

1.Hardware of the Siemens S7-300 and/or 400 PLC
2.I/O electrical connections for various modules
3.Rack grouping
4.Developing, monitoring & documentation software

  • Lesson 2

1.General features of the STEP 7 family
2.IEC 1131 ‘compliant’ software structure

  • Lesson 3

1.The STEP 7 programming package
2.Connecting the PLC and starting up the terminal
3.Choosing the program
4.Help system
5.S7 instructions, including the administration functions for existing and/or gates, flip-flops and several timer functions

  • Lesson 4

1.To copy, to change and to store PLC-programs
2.Simatic Manager, fault finding
3.Off-line & On-line mode
4.Monitoring and modification of variables

  • Lesson 5

1.Up- and downloading programs
2.Writing, testing, and documenting a PLC-program
3.Identifying data and data types and interpreting the different formats

End of the workshop


While both In-House and Online training can present with cost-effectiveness and time-efficacy, there are some very specific differences between in-house courses and those based online.
The demand for additional courses by individuals or groups of people is increasing. Still, it depends entirely on the preferences of a person what type of training he or she wants to receive. Online courses and in-house training carry some similarities but they are considered to exhibit some very pivotal differences too. Despite that, both types of learning can be really beneficial for attendees.

For Registration and other Training arrangements,
contact us on the detail below.

SOUTH AFRICA : +27 11 057 6001
TANZANIA Cell: +255 769 688 544
WhatsApp +27 79 574 0389 /