Endress+Hauser NRF81, Руководство по эксплуатации

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Tankside Monitor NRF81 Commissioning
Hauser 61
9.2.3 Configuration of the 4-20mA inputs
D
E
F
C
B
A
1
1
1
1 3
2
2 4
1
HR
CDI
WP
on
SIM
2
2
3
3
4
4
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
POWER
i
B
B1-3 B4-8
1 2 3 4 5 6 7 8
C
1 2 3 4 5 6 7 8
C1-3 C4-8
A0032464
 27 Possible locations of the Analog I/O modules, which can be used as a 4-20mA input. The order code of the
device determines which of these modules is actually present →  20.
For each Analog I/O module to which a 4-20mA device is connected, proceed as follows:
1. Make sure the 4-20mA devices are connected as defined by the terminal assignment
→  26.
2. Navigate to the submenu of the respective Analog I/O module: Setup → Advanced
setup → Input/output → Analog I/O X1-3
3. Go to the Operating mode parameter (→  138) and select 4..20mA input or
HART 4..20mA input .
4. Go to the Process variable parameter (→  144) and specify which process variable
is transmitted by the connected device.
5. Go to the Analog input 0% value parameter (→  144) and define which value of
the process variable corresponds to an input current of 4 mA (see diagram below).
6. Go to the Analog input 100% value parameter (→  144) and define which value
of the process variable corresponds to an input current of 20 mA (see diagram
below).
7. Go to the Process value parameter (→  145) and check whether the indicated
value matches the actual value of the process variable.
4mA
1
20mA
0% 2 100%
I [mA]
A0029264
 28 Scaling of the 4-20mA input to the process variable
1 Input value in mA
2 Process value
The Analog I/O submenu contains additional parameters for a more detailed
configuration of the Analog Input. For a description refer to : →  138