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STEP 5 Operations
S5-100U
Generating a Data Block
STL
Explanation
Example
Generate a data block with 128 data
words without the aid of a pro-
grammer.
L
KF + 127
G
DB
5
The constant fixed-point number
+127 is loaded into ACCU 1. At
the same time, the old contents
of ACCU 1 are shifted to ACCU 2.
Data block 5 is generated with a
length of 128 data words (0000)
in the RAM of the PLC and
entered in the block address list.
The next time the “G DB5”
operation is processed, it has no
effect if the contents of
ACCU 1 are not 0.
Deleting a Data Block
STL
Explanation
Example
Delete a data block that is no longer
needed.
L
KF + 0
G
DB
5
The constant fixed-point number
+0 is loaded into ACCU 1. At the
same time, the old contents of
ACCU 1 are shifted to ACCU 2.
Data block 5, which must be in
the RAM of the PLC, is declared
invalid and removed from the
block address list.
8-36
EWA 4NEB 812 6120-02b
Содержание SIMATIC S5-100U
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Страница 505: ...B Dimension Drawings EWA 4NEB 812 6120 02b ...
Страница 515: ...C Active and Passive Faults in Automation Equipment EWA 4NEB 812 6120 02b ...
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Страница 523: ...D Information for Ordering Accessories EWA 4NEB 812 6120 02b ...
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Страница 531: ...E Reference Materials EWA 4NEB 812 6120 02b ...
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Страница 535: ...F Siemens Addresses Worldwide EWA 4NEB 812 6120 02b ...
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Страница 543: ...Index EWA 4NEB 812 6120 02b ...
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