ABB SafeMove2, Applications Manual, Page: 99 / 238

4.6.4 Pre-logic and post-logic
Configuring combinatory logic
The combinatory logic has two layers:
• Pre-logic - executed before the safety application
• Post-logic - executed after the safety application
The user defines logic diagrams by writing statements. The combinatory logic
operators can be grouped into logical operators, arithmetic operators, and complex
operators.
For more detailed information including rules and limitations, see Safe I/O system
rules and limitations on page 108 .
Creating statements
Operators can be combined into complex statements.
Global signals can automatically be created from the statements by clicking Create
signals .
xx1600000054
Note
Signals between blocks are created internally and will not be available to the
user. For example the signal between the
OR and the AND block in the above
picture.
Tip
First use the button Create signals to automatically create global signals from
the statement, then use cut and paste to move signals to safe inputs or outputs.
Continues on next page
Application manual - Functional safety and SafeMove2 99
3HAC052610-001 Revision: P
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4 The Visual SafeMove user interface in RobotStudio
4.6.4 Pre-logic and post-logic