Endress+Hauser Proservo NMS80 Functional Safety Manual page 16

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Carry out function test.
6.
For MIN and MAX monitoring, at least one level/current input value above (MAX
monitoring) or below (MIN monitoring) the switch point must be approached.
For range monitoring, 5 level values/current input values which cover the entire measuring
range should be approached. In doing so, check that the safety-related signal (current output/
relay contact) responds correctly in each case.
Confirm that the function test has been successful.
7.
Confirm function test = Yes.
Set write protection = Enter the locking code again (SIL: 7452). Check the locking status
8.
after performing SIL locking.
Navigate to: Setup → Advanced setup
Locking status = SIL locked must be confirmed by selecting "".
As an option, hardware locking can also be activated (via the dip switch marked "WP" on the
9.
main electronics).
Proservo NMS80/81/83
Endress+Hauser