Siemens SIMATIC S5 CP 523 Manual page 189

Serial i/o module
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Table of Contents

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1
System Overview
2
Technical Description
3
Hardware Installation
4
Notes on Operation
5
Address Assignment
6
Print Mode
7
Communications Mode
8
Using the "SEND" and "RECEIVE" Function Blocks
8.1
Using "SEND" FB 200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1
8.1.1
Calling "SEND" FB 200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 2
8.1.2
Setting "SEND" FB 200 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 3
8.1.3
Structure of the Status Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 4
8.1.4
Schematic of the Principle of Operation of "SEND" FB 200
8.1.5
Flowchart of "SEND" FB 200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 6
8.1.6
Flags in "SEND" FB 200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 10
8.2
Using "RECEIVE" FB 201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 21
8.2.1
Calling and Setting "RECEIVE" FB 201 Parameters . . . . . . . . . . . . . . . 8 - 21
8.2.2
Structure of the Status Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 22
8.2.3
Schematic Representation of the Method of Operation
of "RECEIVE" FB 201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 22
8.2.4
Flowchart of "RECEIVE" FB 201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 24
8.2.5
Flags in "RECEIVE" FB 201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 28
8.2.6
Execution Times for FB 200 and 201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 37
EWA 4NEB 811 6044-02a
. . . . . . . 8 - 5

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