Monitoring channel status bits, Monitoring channel status bits -8 – Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module User Manual User Manual
Page 80
Publication 1746-UM003A-EN-P
5-8 Ladder Programming Examples
Table 5.1 Data Table (Class 3)
Monitoring Channel Status
Bits
The following illustration shows how to monitor the open- and short-circuit
error bits of each channel and set an alarm in the processor if one of the RTDs
or resistance-input devices (such as a potentiometer) opens or shorts. An
open-circuit error can occur if the RTD or resistance-input device breaks or
one of the RTD or resistance-input device wires get cut or disconnected from
the terminal block. A short-circuit condition applies only to RTD input.
Address
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
N10:0
0
0
1
0
1
0
0
0
0
0
1
1
1
1
1
0
N10:1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N10:2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N10:3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N10:4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N10:5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N10:6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N10:7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N10:8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
N10:9
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
0