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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
ix
9-3 Possible causes for the CPU memory reset request .................................9-13
9-4 Procedure for resetting the CPU memory..................................................9-14
9-5 Operations in the CPU during a memory reset..........................................9-16
9-6 Software requirements ...............................................................................9-23
9-7 DP address areas of the CPUs ..................................................................9-23
9-8 Event recognition by CPUs 31x-2 DP acting as the DP master ................9-25
9-9 Event recognition by CPUs 31x-2 DP acting as DP slave .........................9-28
9-10 Configuration example for the address areas in transfer memory.............9-30
10-1 Backup of the operating system on MC .....................................................10-2
10-2 Updating the operating system with MC/MMC...........................................10-3
11-1 The differences between forcing and controlling variables........................11-3
11-2 Status and error displays ...........................................................................11-7
11-3 Evaluation of the SF LED (software error).................................................11-8
11-4 Evaluation of the SF LED (hardware error)................................................11-9
11-5 The BUSF, BUSF1 and BUSF2 LEDs .....................................................11-10
11-6 The BUSF LED lights up. .........................................................................11-11
11-7 The BUSF LED flashes ............................................................................11-11
11-8 Event recognition by CPUs 31x-2 as the DP master ...............................11-14
11-9 Evaluation in the DP master of RUN to STOP transitions
by the DP slave ........................................................................................11-14
11-10 Reading the diagnostic information using STEP 5 and
STEP 7 in the masters system.................................................................11-16
11-11 Event recognition by CPUs 31x-2 acting as the DP slave .......................11-19
11-12 Evaluation of RUN to STOP transitions in the DP master/DP slave........11-20
11-13 Structure of station status 1 (byte 0) ........................................................11-23
11-14 Structure of station status 2 (byte 1) ........................................................11-23
11-15 Structure of station status 3 (byte 2) ........................................................11-24
11-16 Structure of the master PROFIBUS address (byte 3)..............................11-24
11-17 Structure of the vendor ID (byte 4, 5).......................................................11-24
12-1 Starting the system after specific events....................................................12-1
12-2 Mains voltage .............................................................................................12-2
12-3 Protection against external electrical interference .....................................12-2
12-4 Protection against external electrical interference .....................................12-2
12-5 Coupling mechanisms................................................................................12-4
12-6 Key to example 1........................................................................................12-9
12-7 Routing cables inside buildings................................................................12-14
12-8 High-voltage protection of cables with surge voltage protection
components..............................................................................................12-20
12-9 Surge voltage protection components for lightning protection
zones 1 <-> 2 ...........................................................................................12-22
12-10 Surge voltage protection components for lightning protection
zones 2 <-> 3 ...........................................................................................12-23
12-11 Example of a lightning-protected structure (key to figure above) ............12-25
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