5 Implementation of Modbus TCP
5.10 Diagnostic messages of the modules
96
XI/ON: XNE-GWBR-2ETH-MB
10/2011 MN05002008Z-EN
www.eaton.com
5.10.2
Analog input modules
• XN-1AI-I(0/4...20MA)
• XN-2AI-I(0/4...20MA)
Table 39:
XN-1AI-I
(0/4...20MA)
Diagnosis byte
Bit
Diagnosis
n (channel 1)
0
Measurement value range error:
Indication of overcurrent or undercurrent of 1 % of the set
current range.
– Current 0…20 mA:
– Overcurrent: I
max
(I > 20.2 mA);
– Undercurrent is not detected.
– Current 4…20 mA:
– Overcurrent: I
max
(I > 20.2 mA);
– Undercurrent: I
min
(I < 3.8 mA)
1
Wire break:
– Indication of a wire break in the signal cable for operating
mode 4…20 mA with a threshold of 3 mA.
Table 40:
XN-2AI-I
(0/4...20MA)
Diagnosis byte
Bit
Diagnosis
n (channel 1)
0
Measurement value range error:
Indication of overcurrent or undercurrent of 1 % of the set
current range.
– Current 0…20 mA:
– Overcurrent: I
max
(I > 20.2 mA);
– Undercurrent is not detected.
– Current 4…20 mA:
– Overcurrent: I
max
(I > 20.2 mA);
– Undercurrent: I
min
(I < 3.8 mA)
1
Wire break:
– Indication of a wire break in the signal cable for operating
mode 4…20 mA with a threshold of 3 mA.
n + 1 (channel 2) 0
Measurement value range error:
Indication of overcurrent or undercurrent of 1 % of the set
current range.
– Current 0…20 mA:
– Overcurrent: I
max
(I > 20.2 mA);
– Undercurrent is not detected.
– Current 4…20 mA:
– Overcurrent: I
max
(I > 20.2 mA);
– Undercurrent: I
min
(I < 3.8 mA)
1
Wire break:
– Indication of a wire break in the signal cable for operating
mode 4…20 mA with a threshold of 3 mA.