Siemens SIMATIC S5-95U - Section 3

Figures
3.1 Node in a Computer Link with 3964(R) Transmission Protocol . . . . . . . . . . 3 - 1
3.2 Pin Assignments S5-95U (TTY Active) - any
Communication Partner (TTY Passive) . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 3
3.3 Pin Assignments of S5-95U (TTY Passive) - any
Communication Partner (TTY Active) . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 4
3.4 Pin Assignments of the S5-95U (TTY Active) - CP 523 (TTY Passive) . . . . 3 - 4
3.5 Functional Model of a Computer Link . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 5
3.6 Structure of the Coordination Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 7
3.7 DB1 with Default Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 10
3.8 Access to Parameterization Data in a Computer Link . . . . . . . . . . . . . . . . 3 - 12
3.9 Program Structure of a Computer Link . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 15
3.10 Example of an 11-Bit Character Frame . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 19
3.11 Error-Free Communication During Sending . . . . . . . . . . . . . . . . . . . . . . . 3 - 21
3.12 Error-Free Communication During Receiving . . . . . . . . . . . . . . . . . . . . . . 3 - 22
3.13 Incorrect Data Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 23
3.14 Solving an Initialization Conflict . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 24
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Tables
3.1 Error Messages in the ”Send” Coordination Byte . . . . . . . . . . . . . . . . . . 3 - 8
3.2 Error Messages in the ”Receive” Coordination Byte . . . . . . . . . . . . . . . . 3 - 9
3.3 Computer Link, DB1 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 11
3.4 Meanings of the Mode Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 12
3.5 Meanings of the Types of Parity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 13
3.6 Character Frames and Sequence of Bits Transmitted in a Computer Link
(Depending on Data Format) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 13
3.7 Character Delay Time Depending on the Transmission Rate
in a Computer Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 14
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EWA 4NEB 812 6095-02