Function Description
Operating Manual PNOZ m EF 4AI
1004650-EN-02
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}
Working range (R2 … R3)
Default: 3.8 … 20.5 mA
(valid measuring range, upper and lower range limit)
}
Upper failure information range
(
R4 … 25 mA)
Default: 21 … 25 mA
(e.g. short circuit or transducer error)
}
Hysteresis (R1 … R2, R3 … R4)
–
Upper hysteresis R3 ... R4:
The numerical value is invalid, when R4 is exceeded.
The numerical value is valid again when R3 is undershot.
–
Lower hysteresis R1 … R2:
The numerical value is invalid, when R1 is undershot.
The numerical value is valid again when R2 is exceeded.
Example: Numerical value undershoots the working range
mA
t
R1
R4
R2
R3
0
1
Failure information
Failure information
Hysteresis
Hysteresis
Workspace
Numerical value
valid
