4 System Startup
4.1 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1
4.1.1 Controls on the Power Supply Module and Central Processing Unit 4 - 1
4.1.2 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 4
4.1.3 CPU Operation in ”RUN” and ”STOP” Modes . . . . . . . . . . . . . . . . . 4 - 6
4.1.4 Cold Restart and Warm Restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 8
4.1.5 Battery Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 13
4.1.6 Overall Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 13
4.1.7 Steps for System Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 14
4.2 Working with Input/Output Modules . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 18
4.3 System Startup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 18
4.3.1 Safety Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 18
4.3.2 Checking a Plant or Controlled System before Startup . . . . . . . . . . 4 - 19
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EWA 4NEB 811 6148-02