Rockwell Automation T8094 8000 Series TMR System Safety Manual - Manual (Page 79)

SAFETY MANUAL
D oc N umber T8094
I ssue 27 – June 2013
Page 58 of 103
4.2.3 Override Requirements Checklist
Description Reference
Are the effects of overriding fully understood,
particularly where the override action will affect
independent parts of an application?
3.9
Has a method of enabling, or more importantly
removing, the overrides for the system as
whole, or individual sub-systems, been
provided?
3.9
Have programming or procedural measures
been defined to ensure that no more than a
single override may be applied to a given safety-
related process unit?
3.9
Have indication of the presence of override
conditions and recording their application and
removal been defined?
3.9
Is there an alternative method of removing an
override?
3.9
Are there programming or procedural measures
to limit the period of override?
3.9