Lenze E82xVxxxKxxxxx - Manual (Page 498)

Safety engineering
Functional test
Important notes
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498 EDS82EV903 EN 3.0
14.4 Functional test
14.4.1 Important notes
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Danger!
Unexpected start−up of the machine possible
The "Safe torque off" safety function provides protection against an
unexpected start−up of the drive and therefore is an important item within the
safety concept for a machine. It has to be ensured that this function works
correctly.
Possible consequences:
ƒ Death, severe injury, or damage to material assets, when the safety function
fails.
Protective measures:
After the installation and at regular intervals, the operator has to check the
function of the "Safe torque off" circuit.
ƒ When doing this, check both disconnecting paths separately with regard to
their disconnection capability.
ƒ The functional test can be carried out manually or automatically via the PLC.
ƒ Basically the inspection interval depends on the application and the
corresponding risk analysis, as well as on the system as a whole. It should
not exceed 1 year.
ƒ If the functional test shows impermissible states,
– the drive or the machine has to be shut down immediately.
– commissioning is not permitted until the safety function operates
correctly.