ABB AC500-S Safety User Manual page 166

Configuration and programming
System configuration and programming > Checking of program and system configuration
5.
The SVT checklist has one data checksum for the whole document file and a data checksum for
each safety device in the safety project.
You can use the data checksums to verify whether the safety project has changed. If all of the
data checksums in the SVT checklist are identical, there are no changes in the safety project
and you do not need to repeat the manual checks.
For large safety projects, you can use suitable software tool to compare two textual versions of
the SVT checklist to locate any differences.
4.3.7.1.3 How to verify the SVT checklist
Carefully read through the SVT checklist and mark the corresponding checkbox for each section
and question in the SVT checklist, if the result of your verification is positive.
166
If working with password protected CODESYS Safety projects, Automation Builder will
Ä "An unauthorized access to safety CPU and safety program is
request for password
protected by three passwords: " on page 128.
ð When SVT runs, the Automation Builder user interface is disabled. For large safety
projects this can take several minutes.
When the SVT run is complete, Automation Builder shows a message to indicate that
the SVT verification is done.
The message shows the path and name of the SVT checklist. The file name contains
the name of the AC500-S safety CPU application node as well as the date and time of
the SVT run. The date is in ISO format (YYYY-MM-DD) and the time in hours-minutes-
seconds (hh-mm-ss) format.
NOTICE!
You can run SVT as often as you want to verify your safety project. We recom-
mend that you archive the SVT checklists for final project revisions that are
taken into use. You can then use the archived SVT checklists as a reference
when you verify changes to your safety projects. An archived and verified SVT
checklist allows you to skip sections and safety devices that you have already
verified, if the data checksums did not change.
You can also skip the manual checks for sections that have identical data
checksums to the previous validated version of the SVT checklist. You only
need to do the manual checks for sections in the SVT checklist that have a dif-
ferent data checksum.
NOTICE!
The excerpts from an SVT checklist in this section are examples only and have
been edited to fit. Your SVT checklist may look different depending on the ver-
sions of Automation Builder and SVT.
3ADR025091M0208, 12, en_US 2020/06/19