Plc System Start-Up And Program Test; Prerequisites For Starting Up A Plc; Steps For System Start-Up; Overall Reset - Siemens SIMATIC S5-115U User Manual

S5-115U Manual
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PLC System Start-Up and Program Test

This chapter contains notes on starting up an S5-115U with information on testing your STEP 5
control program.
A prerequisite is knowledge of the principle of operation of the PLC (see Chapter 2).
There are notes on starting up a system at the end of the chapter.
4.1

Prerequisites for Starting Up a PLC

Make sure that
• all necessary I/O modules are plugged into suitable slots (see Chapter 3)
• the address assignment of the inputs and outputs is in order (see Chapter 6)
• the control program to be tested is available on the programmer.
4.2

Steps for System Start-Up

4.2.1

Overall Reset

You are recommended to perform the Overall Reset function before entering a new program.
Overall Reset deletes the following:
• PLC program memory
• All data (flags, timers and counters)
• All error IDs.
In addition, all system data is automatically assigned default values after Overall Reset so that the
system data area assumes a defined "basic status".
EWA 4NEB 811 6130-02b
PLC System Start-Up and Program Test
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