Result
The device is in the "Functional Safety enabled" device mode.
● The "SIL" symbol is displayed.
● The "DSABL" command appears (Disable Functional Safety).
● All parameters are protected against changes.
● When a safety-related error is detected on the device, the device changes to "Safety critical
error" device mode (Page 168).
See also
Troubleshooting Functional Security (Page 190)
10.2.2
Enabling Functional Safety over remote operation
Requirement
● You have documented the device identification:
– During installation, you have read and documented the product name and the serial
number on the rating plate of the device.
– You have defined and documented a long tag (Page 143).
● You have checked the settings of the safety-related parameters.
Safety-related parameters (Page 159)
● You have selected one of the following characteristic curves using the "Application"
parameter [05]:
– Linear, proportional to pressure
– Linear, proportional to level
– Volume flow: two step linear, square root.
– Mass flow: two step linear, square root.
● You have enabled the "User PIN" parameter [27].
The user PIN you use is not the preset user PIN (2457).
Functional Safety
10.2 Enabling Functional Safety
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA
163