Integrated Blocks And Their Functions - Siemens SIMATIC S5-90U System Manual

9

Integrated Blocks and Their Functions

9.1 Integrated Organization Blocks (OBs)
9.1.1 Cyclic Program Execution (OB1) . . . . . . . . . . . . . . . . . . . . . . . . .
9.1.2 Interrupt-Driven Program Execution (OB3)
9.1.3 Time-Controlled Program Execution (OB13; for S5-95U only) . . . . .
9.1.4 Restart Processing (OB21, OB22) . . . . . . . . . . . . . . . . . . . . . . . .
9.1.5 Retriggering the Scan Time (OB31; for S5-95U only)
9.1.6 Procedure after Battery Failure (OB34; for S5-95U only)
9.1.7 OB251 PID Algorithm (for S5-95U only) . . . . . . . . . . . . . . . . . . . .
9.2 Integrated Function Blocks (FBs) . . . . . . . . . . . . . . . . . . . . . . . . .
9.2.1 Code Converter : B4 - FB240 -
9.2.2 Code Converter : 16 - FB 241-
9.2.3 Multiplier : 16 - FB242 -
9.2.4 Divider : 16 - FB243 -
9.2.5 Reading of Analog Values (FB250)
9.2.6 Output of Analog Values (FB251)
9.3 Integrated Sequence Block 2 (SB2) . . . . . . . . . . . . . . . . . . . . . . .
9.4 Integrated Data Block 1 (DB1)
9.4.1 Parameter Blocks
9.4.2 Rules to Observe When Generating DB1
9.4.3 Transferring DB1 Parameters to the Programmable Controller
9.4.4 Procedure for Parameterizing the PLC . . . . . . . . . . . . . . . . . . . . .
9.4.5 How to Recognize and Correct Parameter Errors
EWA 4NEB 812 6115-02b
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