User Manual

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 1514131211109876543210
N10:0 0010100000111110
N10:1 0000000000000000
N10:2 0000000000000000
N10:3 0000000000000000
N10:4 0000000000000000
N10:5 0000000000000000
N10:6 0000000000000000
N10:7 0000000000000000
N10:8 0000000000000011
N10:9 0000000000110010