Endress+Hauser Proline Prosonic Flow P 500 Functional Safety Manual page 20

Use in protective systems
NOTICE
Once the SIL device has been locked, the process-related parameters are write protected,
and thereby locked, for security reasons.
It is still possible to read the parameters. When SIL locking is enabled, restrictions apply on all
communication options, such as the service interface, HART protocol and WirelessHART
protocol, local display and WLAN.
‣
Follow the specified locking sequence.
1. Ensure preconditions are met.

2. In the Setup menu → Advanced setup submenu, select the SIL confirmation wizard.
3. Select the Set write protection parameter.
4. Enter the SIL locking code 7452.
 The device first checks the preconditions listed under item 1.
NOTICE
If these preconditions are not met, the message "SIL preparation = failed" appears on the
display along with the parameter that failed to meet the preconditions under 1.
The SIL confirmation sequence is not continued.
‣
Check preconditions.
If the preconditions are met, the message SIL preparation = finished appears on the display.
Once the preconditions have been met, the device automatically switches the following
parameters to safety-oriented settings:
20
Current output 1
Current span
= 4...20 mA or
= 4...20 mA NAMUR or
= 4...20 mA US
Setup
Failure mode
= Min. or
= Max.
Proline Prosonic Flow P 500 HART
Low flow cut off
Assign
process variable
= Volume flow
= Off
Endress+Hauser
A0043165-EN