Siemens SIMATIC S5-115U, Руководство пользователя

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12 Communications Capabilities
12.1 Data Interchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 1
12.1.1 Interprocessor Communication Flags . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 1
12.1.2 Page Frame Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 7
12.2 SINEC L1 Local Area Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 7
12.2.1 Principle of Operation of the SINEC L1 Local Area Network . . . . . . . 12- 8
12.2.2 Coordinating Data Interchange in the Control Program . . . . . . . . . 12- 9
12.2.3 Assigning Parameters to the S5-115U for Data Interchange . . . . . . 12- 12
12.3 Point-to-Point Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 16
12.3.1 Connecting a Communications Partner . . . . . . . . . . . . . . . . . . . . . . . . 12- 17
12.3.2 Setting Parameters and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 18
12.4 ASCII Driver (for CPU 943/944 with Two Serial Interfaces Only) . . . 12- 20
12.4.1 Data Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 21
12.4.2 Coordination Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 23
12.4.3 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 24
12.4.4 ASCII Parameter Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 26
12.4.5 Assigning Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 29
12.4.6 Sample Program for ASCII Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 30
12.5 Communications Link Using the 3964/3964R Communications
Protocol (for CPU 944 with Two Serial Ports Only)
. . . . . . . . . . . . . . . 12- 38
12.5.1 Data Interchange over the SI 2 Interface . . . . . . . . . . . . . . . . . . . . . . . 12- 40
12.5.2 Assigning a Mode Number (System Data Word 55, EA6E
H
) . . . . . . . 12- 41
12.5.3 Assigning the Driver Number for a Communications Link . . . . . . . . 12- 42
12.5.4 Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 42
12.5.5 Sample Program for Transmitting Data . . . . . . . . . . . . . . . . . . . . . . . . 12- 53
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EWA 4NEB 811 6130-02b