Allen-Bradley GuardPLC 1753, Safety Reference Manual

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Publication 1753-RM002C-EN-P - September 2008 81
GuardPLC Controller Operating System Chapter 7
Forcing
Forcing is only permissible after consulting the approving board
responsible for site approval. During forcing, the person in charge
must ensure sufficient safety technical monitoring of the process by
other technical and structural measures.
The following forcing options are possible.
•
Forcing can be prohibited by configuration. If it is prohibited,
the PES no longer accepts force values defined specifically by
the application. In this case, new force values can be set only
after re-enabling the force system.
•
A Select All can be effected via the Force Editor in RSLogix
Guard PLUS! software. All displayed signals should be verified in
the controller.
•
All forced inputs or outputs can be reset by a STOP force
command in the Force Editor in RSLogix Guard PLUS! software.
All individual force values and switches are held in their current
state. Once you restart forcing, they become active again.
More information about forcing can be found in the Using RSLogix
Guard Plus! Software with GuardPLC Controllers Programming
Manual, publication 1753-PM001.
General information about forcing can be found in the TÜV document
Maintenance Override. To access the document on the Internet, see
these websites.
•
TÜV-Product-Service, http://www.tuvglobal.com
•
TÜV-Rheinland, http://www.tuv-fs.com
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