Siemens Simatic S7-300 CP 341 - Page 14

Table of contents
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
14 Manual, 09/2008, A5E02191071-01
Figures
Figure 1-1 Positions of the module elements on the CP 341 communication processor. ........................... 20
Figure 1-2 Bus connector ............................................................................................................................ 21
Figure 2-1 10-bit character frame ................................................................................................................ 31
Figure 2-2 Character delay time.................................................................................................................. 32
Figure 2-3 Position of the supplied protocols of the CP 341 in the reference model . ................................. 35
Figure 2-4 Block Checksum ........................................................................................................................ 39
Figure 2-5 Data traffic when sending with the 3964(R) procedure. ............................................................. 40
Figure 2-6 Data traffic when receiving with the 3964(R) procedure. ........................................................... 42
Figure 2-7 Data traffic when erroneous data is received............................................................................. 44
Figure 2-8 Data traffic in the event of an initialization conflict ..................................................................... 45
Figure 2-9 Flow diagram of the start-up of the 3964(R) Procedure . ........................................................... 46
Figure 2-10 Flow Diagram of Sending with the 3964(R) Procedure . ............................................................ 47
Figure 2-11 Flow Diagram for Receiving with the 3964(R) Procedure (Part 1). ............................................ 48
Figure 2-12 Flow diagram for receiving with the 3964(R) procedure (Part 2). .............................................. 49
Figure 2-13 Data traffic when sending with a response message frame . ..................................................... 53
Figure 2-14 Sequence of a continuation SEND message frame with a continuation response message
frame .......................................................................................................................................... 55
Figure 2-15 Data traffic when fetching with a response message frame . ..................................................... 56
Figure 2-16 Sequence of a continuation FETCH message frame with a continuation response
message frame .......................................................................................................................... 58
Figure 2-17 Quasi-full-duplex mode .............................................................................................................. 59
Figure 2-18 Flow diagram of data transmission with the RK 512 when CPU requests are made . ............... 60
Figure 2-19 Flow diagram of data transmission with the RK 512 when partner requests are made . ........... 61
Figure 2-20 Flowchart of a send operation.................................................................................................... 63
Figure 2-21 Flow diagram for receiving with end criterion "Expiration of character delay time" . .................. 65
Figure 2-22 Flow diagram for receiving with end criterion "End-of-text character" . ...................................... 67
Figure 2-23 Flow diagram for receiving with end criterion "Fixed message frame length" . .......................... 69
Figure 2-24 Timing diagram of automatic control of the RS 232C accompanying signals . .......................... 73
Figure 2-25 Flow chart of printout.................................................................................................................. 77
Figure 2-26 Wiring of the receiver at the X27 (RS 422) interface (3964(R) procedure) . .............................. 84
Figure 2-27 Wiring of the receiver at the X27 (RS 422/485) interface (ASCII driver) . .................................. 93
Figure 2-28 Schematic structure of the format string .................................................................................... 99
Figure 2-29 Schematic structure of a conversion statement. ...................................................................... 100
Figure 2-30 Schematic structure of control statements. .............................................................................. 106
Figure 4-1 Connection terminal ................................................................................................................. 113
Figure 6-1 Time sequence chart of FB 8 P_SND_RK . .............................................................................. 135
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