Siemens Simatic S7-300 CPU 31xC Series User Manual

Table of contents
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
xiii
Table 10-8 BF2/ BUSF LED is lit.............................................................................................................. 10-17
Table 10-9 BF2/ BUSF LED flashes on a PROFINET IO controller ........................................................ 10-17
Table 10-10 Event detection of CPU 31x#2 operating as DP master ........................................................ 10-20
Table 10-11 Evaluating RUN to STOP transitions of the DP slave in the DP master................................ 10-20
Table 10-12 Reading out diagnostic data in the master system, using STEP 5 and STEP 7 ................... 10-21
Table 10-13 Event recognition of CPUs 31x-2 operating in DP slave mode ............................................. 10-24
Table 10-14 Evaluating RUN#STOP transitions in the DP Master/DP Slave............................................. 10-25
Table 10-15 Structure of Station Status 1 (Byte 0) .................................................................................... 10-28
Table 10-16 Structure of Station Status 2 (Byte 1) .................................................................................... 10-28
Table 10-17 Structure of Station Status 3 (Byte 2) .................................................................................... 10-29
Table 10-18 Structure of the Master PROFIBUS address (byte 3)............................................................ 10-29
Table 10-19 Structure of the manufacturer ID (byte 4 and 5) .................................................................... 10-29
Table A-1 System startup after specific events .......................................................................................... A-1
Table A-2 Mains voltage .............................................................................................................................A-2
Table A-3 Protection against external electrical interference..................................................................... A-2
Table A-4 Protection against external electrical interference..................................................................... A-2
Table A-5 Coupling mechanisms................................................................................................................A-4
Table A-1 Key to example 1 .....................................................................................................................A-10
Table A-2 Cable routing inside buildings ..................................................................................................A-16
Table A-3 High#voltage protection of cables with the help of surge protection equipment ...................... A-21
Table A-4 Surge-protection components for lightning protection zones 1 <-> 2......................................A-24
Table A-5 Surge-protection components for lightning protection zones 2 <-> 3......................................A-25
Table A-6 Example of a circuit conforming to lightning protection requirements (legend to previous figure)
.................................................................................................................................................A-27

Siemens Simatic S7-300 CPU 31xC Series Specifications

General

Series	S7-300 CPU 31xC
Power Supply	24 V DC
Communication Interfaces	MPI, PROFIBUS DP
Programming Languages	LAD, STL, FBD, SCL
Operating Temperature	0°C to +60°C
Memory	48 KB - 512 KB
Dimensions	40 x 125 x 130 mm (varies by model)