Micropilot FMR60/62/67
18 Endress+Hauser
The following parameters affect the safety function. If the settings differ from the permitted values
mentioned, the SIL/WHG confirmation is canceled automatically, and the device cannot be locked
neither in increased safety mode nor in expert mode.
Parameter Parameter name
Setup → Advanced setup → Current output 1 Assign current output
Failure mode = Min. or Max.
Expert → Output → Current output 1
Assign current output
Start-up mode = Min. or Max.
Expert → Communication → Output Assign PV
• Those parameters which are not mentioned do not affect the safety function and can be
configured to any meaningful values. The visibility of the parameters mentioned in the
operating menu depends in part on the user role, the SW options ordered and on the
configuration of other parameters.
• In the SIL mode, the device must not be operated in HART-Multidrop mode, as otherwise the
current output will assume a fixed value. For this reason, only the following setting is
permitted in the SIL mode and in the combined SIL/WHG mode when in increased safety
mode: Expert → Communication → Configuration → HART address = 0. In pure WHG mode,
HART Multidrop is permitted in the expert mode as long as the HART signal is evaluated in
an external switching unit (e.g. Tank Side Monitor NRF590) that complies with the approval
principles as per WHG.
Unlocking a SIL device
When SIL locking is active on a device, the device is protected against unauthorized operation by
means of a locking code and, as an additional option, by means of a hardware write protection
switch. The device must be unlocked in order to change the configuration, to perform proof tests as
per test sequence B→ 21, test sequence C→ 22 or test sequence D→ 23 , as well as to
reset self-holding diagnostic messages.
L
CAUTION
Unlocking the device deactivates diagnostic functions, and the device may not be able to carry
out its safety function when unlocked.
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Therefore, independent measures must be taken to ensure that there is no risk of danger while
the device is unlocked.
To unlock, proceed as follows:
1. Check the position of the hardware write protection switch (dip switch marked "WP" on main
electronics), and set this switch to "Off".
2. Select the sequence Setup → Advanced setup → Deactivate SIL/WHG and enter the relevant
locking code for the Reset write protection parameter (WHG: 7450; SIL: 7452; SIL and WHG:
7454).
The "End of sequence" message indicates that the device was successfully unlocked.
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