Rockwell Automation 1771-IXHR , D17716.5.80 HIGH RESOL.THERMOCOUPLE - Manual (Page 46)

Troubleshooting
Chapter 8
8Ć3
Word Explanation Bit
Word 1
(cont)
04 The module's ambient temperature is below 0 o C. Temperature readings will
be inaccurate.
05 The module's ambient temperature is above 60 o C. Temperature readings will
be inaccurate.
06 Not used
07 EEPROM calibration constants could not be read. The module will continue to
operate but readings may be inaccurate.
08-15 Not used
Status Reported in Words 2 and 3
Design your program to monitor over/under range bits, and to take appropriate
action depending on your application requirements. You may also want to
monitor these bits while troubleshooting with your industrial terminal.
Bits 00–07 and 08–15 each represent an input for channels 1–8, respectively.
For example, bit 04 represents input channel 5. The module sets a bit (1) to
indicate it has detected an out of range condition. Refer to Table 8.C.
Table 8.C
Status Reported in Words 2 and 3
Word Bit Condition
2 00-07 Inputs underrange. Bit 00 is channel 1, bit 07 is channel 8. If input connections and
voltages are correct, this status may indicate failed channel communications with
the microprocessor. If all channels are underrange, this indicates a possible dc/dc
converter failure or a blown fuse.
08-15 Inputs overrange. Bit 08 is channel 1, bit 15 is channel 8. If input connections and
voltages are correct, this status may indicate a failed thermocouple functional
analog block (TC FAB).
3 00-07 Corresponding channel input value is below the alarm value that you entered for
that channel.
08-15 Corresponding channel input value has exceeded the alarm value that you entered
for that channel.