Current Transmitter; Fault Current - Siemens SITRANS P 7MF4013 Instruction Manual

4.8

Current Transmitter

The transmitter can be switched to constant current operation for test purposes. In
this case the current no longer corresponds to the process variable. A "C" appears
in the mode display of the digital indicator.
Symbol
C
Table 2
4.9

Fault current

The value of the fault current (Figure 17, p. 95) can be set with this function. A low
(<4 mA) and a high (>20 mA) fault current is available. The fault current signals a
hardware error. In this case "Error" appears in the digital indicator (see Chapter
3.2.3, p. 89). See also NAMUR recommendation NE 43 "Standardization of signal
level for failure information of digital transmitters with analog output signal" of
18.01.94. A detailed list is available through SIMATIC PDM or the HART® Commu-
nicator.
I
A
[mA]
23
22,8
20,5
20
4,0
3,84
3,6
3,55
1. Linear dynamic rang
2. Lower limit of the dynamic range (default value)
3. Upper limit of the dynamic range (default value)
4. Lower fault current value (default value)
5. Upper fault current value (default value)
6. Recommended adjustment range for lower fault current range and lower dynamic range limit
7. Recommended adjustment range for upper fault current range and upper dynamic range limit
Figure 17 Current limits
SITRANS P, MS series
C79000-B5674-C40-04
Constant current mode
Meaning of the mode display
über HART programmierbarer oberer Fehleranzeigebereich
7.
1.
2.
0 %
Range
Functions/Operation via HART®
Explanations
5.
3.
6. 4.
p [%]
100 %
95