System Operations; Set Operations - Siemens SIMATIC S5-95F Manual

S5-95F
8.3

System Operations

System operations and supplementary operations have the following limitations:
• You can program them only in function blocks.
• You can program them only in the STL method of representation.
Since system operations access system data, only users with very profound system knowledge
should use them.
8.3.1

Set Operations

Like the supplementary bit operations, these set operations can change individual bits. Table 8-26
provides an overview of the set operations.
Operation Operand
SU
RU
ID
RS
Processing Set Operations
Execution of set operations does not depend on the RLO.
EWA 4NEB 812 6210-02
Table 8-26. Overview of Set Operations
Set bit unconditionally
A specific bit is set to "1" in the system data area.
Reset bit unconditionally
A specific bit is set to "0" in the system data area.
Parameter
Meaning
0.0 to 255.15
STEP 5 Operations
8-63