10.2 Enabling Functional Safety
You enable or disable Functional Safety with the "Functional Safety" wizard.
The wizard is available via the device with a display and via remote operation (e.g. with the
"Device > Functional Safety" menu command in SIMATIC PDM).
For a device without display, enable Functional Security via remote operation.
You have the following options for enabling Functional Safety:
1. Enable Functional Safety after validation of safety-related parameters and fail-safe
behavior (recommended).
2. Enabling Functional Safety after validation of safety-related parameters and without
validation of fail-safe behavior (recommended).
3. Enable Functional Safety without validation.
See also
Checklist for Functional Safety (Page 248)
10.2.1 Enabling Functional Safety over device with display
Requirement
● You have checked the settings of the safety-related parameters.
Safety-related parameters (Page 159)
Note
The main line of the display has a measured value display with a maximum of five digits.
● To completely display the measured values for upper range value [S3] and lower range
value [S4] by means of the maximum five digits available, set the pressure units
(Page 102)correspondingly.
● You have selected one of the following characteristic curves using the "Application"
parameter [05]:
– Linear, proportional to pressure (PRESS).
– Linear, proportional to level (LEVEL).
– Proportional to flow rate, two-step linear up to the application point (VSLN2 or MSLN2).
● 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)
160 Operating Instructions, 06/2018, A5E44852162-AA
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