S5-90U/S5-95U
Introduction to STEP 5
Block Structure
Each block consists of the following parts.
•
Block header specifying the block type, number, and length.
The programmer generates the block header when it transforms the block.
•
Block body with the STEP 5 program or data.
Absolute
byte
addresses
(in ascending
order)
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a
Synchronization
pattern
Block length
in words
Library number
Block type
Block number
Programmer ID
Figure 7-2. Structure of a Block Header
Programming
Program your blocks as follows (does not apply to data blocks).
1.
Specify the block type (e.g., PB).
2.
Specify the block number (e.g., 27).
3.
Enter the control program statements.
4.
Terminate the block with the ”BE” statement.
EWA 4NEB 812 6115-02b
7-7
Содержание SIMATIC S5-90U
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