Maintenance
Contents of this chapter
This chapter contains information for the maintenance and decommissioning of the safety
function.
Safety circuit maintenance
After the operation of the safety circuit is tested at start-up, it does not need any scheduled
maintenance during its specified lifetime.
It is a good practice to check the operation of the safety function when other maintenance
routines are carried out on the machinery. Include this check in the routine maintenance
program of the machinery that the drive runs.
If you change any wiring or component after the start-up, replace the FSO or FSE-31 module,
modify FSO module parameters, or restore parameters to their factory default values:
•
Use only ABB-approved spare parts.
•
Register the change to the change log for the safety circuit.
•
Test the safety function again after the change. Do the start-up and acceptance test of
the safety function.
•
Document the tests and store the report into the logbook of the machine.
Proof test interval
After the operation of the safety function is validated at start-up, the operation of the safety
function must be ensured by periodic proof testing. In high demand mode of operation, the
maximum proof test interval is 20 years. In low demand mode of operation, the maximum
proof test interval is 2 or 5 years (high or low demand as defined in IEC 61508, EN/IEC
62061 and EN ISO 13849-1). Regardless of the mode of operation, it is a good practice to
check the operation of the safety function at least once a year by doing the start-up and
acceptance test of the safety function.
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