Maintenance; Contents Of This Chapter; Safety Circuit Maintenance; Proof Test Interval - ABB ACS880 User Manual

Maintenance

Contents of this chapter

This chapter contains information for the maintenance and decommissioning of the safety
function.

Safety circuit maintenance

After the safety function is validated, it must be maintained by periodic proof testing.
If you change the wiring or a component after the start-up, replace a power unit or its circuit
boards, replace the FSO 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.
• If parameters were restored to the factory default values: Set the parameters related
to the safety function.
• Do the validation test of the safety function.
• Document the tests and store the report into the logbook of the machine.

Proof test interval

Proof tests are used to detect failures in the safety function. To do a proof test, use the
validation test procedure given in this manual.
Periodic proof testing of the safety function is necessary to maintain the required SIL/PL-level.
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, IEC/EN 62061 and EN ISO 13849-1). Regardless of the
mode of operation, it is a good practice to do the proof test for the safety function at least
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