8.4.3.13 Pressure monitoring 'U.\\PRES'
U. PRES - Activate pressure monitoring
Requirement: The parameter "XDIAG (Page 162)" is set to "On1", "On2" or "On3".
Possible settings: ● OFF
● On
Purpose: Activates or deactivates all pressure-based diagnostics.
Factory setting: On
U1.PUNIT - Pressure unit
Possible settings: bar / psi / MPa
Purpose: Defines the pressure unit for all pressure-based diagnostic param‐
eters.
Factory setting: bar
U2.PZLIM - Low limit of the supply pressure (PZLIM)
Possible settings: 1.4 to 7.0 (bar)
20.30 … 101.52 psi
0.140 ... 0.700 MPa
Purpose: Defines the minimum required supply pressure.
When the value is undershot, the message "18 (Page 234)" ap‐
pears on the display in "Automatic" and "Manual" modes.
Factory setting: 1.4
U3.PZHYS - Hysteresis of the low limit of the supply pressure
Possible settings: 0.2 to 1.0 (bar)
2.90 … 14.50 psi
0.020 ... 0.100 MPa
Purpose: Defines the hysteresis of the low limit of the supply pressure
(U2.PZLIM).
The error message 18 (Page 234) in the "Automatic" and "Manual"
modes is deleted when the value of the supply pressure PZ is
"PZHYS" larger than the value assigned in "U2.PZLIM". The control
becomes active again if the configured fault reaction was "HOLd".
Factory setting: 0.2
Parameter assignment
8.4 Description of parameters
SIPART PS2 with 4 to 20 mA/HART
188 Operating Instructions, 11/2019, A5E00074631-AE
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