Rockwell Automation 1746-INT4 Thermocouple/mV Isolated Input Module Quick Start - Manual (Page 16)

16 Thermocouple/mV Isolated Input Module
Publication 1746-QS002B-EN-P - July 2002
Troubleshoot the Module
Monitor the status of input channel 0 to determine its configuration setting and
operational status. This is useful for troubleshooting when the flashing channel LED
indicates that an error has been flagged. If the module status LED is off, or if the
channel 0 LED is off or flashing, refer to step 8.
TIP
For more detailed information on these procedures, refer to
Chapter 8 (Module Diagnostics and Troubleshooting) of the
user manual.
Channel 1 Data Word
Channel 2 Data Word
Channel 3 Data Word
Output Image
SLC 500 Controller
Data Files
Bit 15 Bit 0
Word 1
Word 2
Word 3
Address
I:1.4
Input Image
Channel 0 Data Word Word 0
Word 7
(8 words)
Channel 1 Status Word
Channel 2 Status Word
Channel 3 Status Word
Channel 0 Status Word
0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0
Input
T
ype
Data Format
Open Circuit
T
ype
T
emperature Units
Zero (not used)
Channel Status Open Circuit Error Under Range Error Over Range Error Configuration Error
For this example, during normal operation only bit 11 is set.