Siemens SIMATIC S7-300 Hardware And Installation Manual page 5

10 10Testing functions, Diagnostics and Fault Elimination
10.1 In this Chapter .................................................................................................10-1
10.2 Overview: Testing functions ............................................................................10-1
10.3 Overview: Diagnostics.....................................................................................10-4
10.4 Diagnostic options with STEP 7 ......................................................................10-5
10.5 Diagnostics with LEDs ....................................................................................10-6
10.6 Diagnostics of DP CPUs ...............................................................................10-12
10.6.1 Diagnostics of DP CPUs operating as DP master ........................................10-12
10.6.2 Diagnostics of DP CPUs operating as DP Slave ..........................................10-14
10.6.3 Interrupts at the DP master ...........................................................................10-21
10.6.4 Structure of slave diagnostic data .................................................................10-22
11 11Appendix
11.1 Installation .......................................................................................................11-1
11.1.1 General rules and regulations for S7-300 operation .......................................11-1
11.2 protection against electromagnetic interference .............................................11-3
11.2.1 Basic points for system installations conforming with EMC requirements......11-3
11.2.2 Five basic rules for insuring EMC ...................................................................11-6
11.2.3 EMC compatible installation of PLC................................................................11-7
11.2.4 Examples of an EMC compatible installation..................................................11-8
11.2.5 Shielding of cables ........................................................................................11-12
11.2.6 Equipotential bonding....................................................................................11-13
11.2.7 Cable routing inside buildings .......................................................................11-14
11.2.8 Outdoor cable routing....................................................................................11-17
11.3 Lightning and surge protection......................................................................11-18
11.3.1 Overview .......................................................................................................11-18
11.3.2 Lightning protection zone conception ...........................................................11-19
11.3.3 Rules for the transition point between lightning protection zones 1..............11-20
11.3.4 Rules for the transition points between lightning protection
zones 1 <-> 2 and higher ..............................................................................11-23
11.3.5 Sample of a surge protection circuit for networked S7-300 PLCs ................11-26
11.3.6 How to protect digital output modules against inductive surge voltage ........11-28
11.4 Safety of electronic control equipment..........................................................11-30
12 12Glossary
13 Index
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
Contents
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11-1
12-1
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