Siemens SIMATIC S7-300 Hardware And Installation Manual page 7

9-8 Using the mode selector switch to reset the memory .....................................9-16
9-9 Using the mode selector switch for a cold start (CPU 318-2 DP only) ...........9-18
9-10 Intermediate memory in CPU 31x-2 DP/31xC-2 DP as DP slave...................9-33
9-11 Direct Data Exchange with CPUs 31x-2 DP/31xC-2 DP.................................9-37
10-1 Unlocking the front connector and removing the module ...............................10-6
10-2 Removing the front connector coding pin .......................................................10-7
10-3 Installing a new module...................................................................................10-7
10-4 Inserting the front connector ...........................................................................10-8
10-5 Replacing the back-up battery in CPU 313/314............................................10-10
10-6 Location of fuses in the digital output module 120/230 VAC ........................10-13
11-1 Principle of Forcing with S7-300 CPUs (all CPUs except 318-2 DP) .............11-3
11-2 Diagnostics with CPU 31x-2..........................................................................11-12
11-3 Diagnostic addresses for DP masters and DP slaves ..................................11-13
11-4 Diagnostic address for the receiving station with direct data exchange .......11-16
11-5 Diagnostic addresses for DP masters and DP slaves ..................................11-20
11-6 Structure of slave diagnostic data .................................................................11-24
11-7 Structure of the ID-specific diagnostics for CPU 31x-2.................................11-27
11-8 Structure of the module status ......................................................................11-28
11-9 Structure of the interrupt status.....................................................................11-29
11-10 Bytes y+4 to y+7 for a diagnostic interrupt
(operating status change by intelligent slave)...............................................11-30
11-11 Bytes y+4 to y+7 for the diagnostic interrupt (SFB 75) .................................11-31
12-1 Possible paths of electromagnetic interference ..............................................12-3
12-2 Example of an EMC compatible cabinet installation .......................................12-9
12-3 Example of EMC compatible wall-mounting .................................................12-11
12-4 Mounting cable shielding...............................................................................12-13
12-5 Equipotential bonding....................................................................................12-14
12-6 Lightning protection zones of a building........................................................12-20
12-7 Sample circuit for networked S7-300 PLCs ..................................................12-26
12-8 EMERGENCY-OFF relay contact in the output circuit..................................12-28
12-9 Circuit for coils operated with DC voltage .....................................................12-29
12-10 Circuit for coils operated with AC voltage .....................................................12-29
S7-300 Programmable Controller Hardware and Installation
A5E00105492-02
Contents
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