Rockwell Automation Publication 1734-UM013J-EN-P - July 2014 159
Get I/O Diagnostic Status from Modules in Logix Systems Appendix B
Table 16 - Fault Code Definitions for 1734-IE4S Modules
Fault Code Description Definition Recommended Action
2 Signal Over Range Exceeded configured range Check field wiring and/or power
3 Signal Under Range Below configured range Check field wiring and/or power
4 Signal Test Failure Undefined error for IE4S
If the problem persists, replace module
5 Dual Channel Discrepancy Exceeded tolerance between dual channels Check field sensors to determine cause of discrepancy
6 Error in other Dual Channel
Input
Partner channel faulted Troubleshoot partner channel fault
100 Sensor Supply Overcurrent Exceeded specification Check field wiring and sensor power draw
101 Sensor Undercurrent Too little current drawn from sensor power Check field wiring and sensor power draw
102 ADC CPU Timing Fault ADC missed a clock, failed a sync, or watchdog
(combination flag)
If the problem persists, replace module
103 3.3V Undervoltage 3.3V supply voltage was detected too low If the problem persists, replace module
104 3.3V Overvoltage 3.3V supply voltage was detected too high If the problem persists, replace module
105 CPU Fault ADC failed register, instruction, or flag diagnostic If the problem persists, replace module
106 Flash Fault FLASH test detected bit errors If the problem persists, replace module
107 RAM fault RAM test detected bit errors If the problem persists, replace module
108 Single Channel
Discrepancy
Dual measurements of single channel disagree If the problem persists, replace module
109 Tach Dual Low Both channels LO at same time Check sensor signal timing
110 Undefined Error Undefined error If the problem persists, replace module
111 Flash Enable Fault ADC's nonvolatile memory drawing too much current
(micro jumped to nonvolatile for some reason)
If the problem persists, replace module
112 Serial Pattern Fault Serial communication pattern errors detected Check field wiring for proper grounding/shielding
Verify that the temperature within the enclosure is not excessive
If the problem persists, replace module
113 Channel Uniqueness Fault Pulse testing of ADC multiplexor revealed improper
channel
If the problem persists, replace module
114 Watchdog Fault ADC watchdog timed out If the problem persists, replace module
115 Sync Timeout Fault ADC conversion out of sync If the problem persists, replace module
116 Missing Clock fault ADC detected a missing clock If the problem persists, replace module
117 SCI Tx fault Serial communication bit errors detected Check field wiring for proper grounding/shielding
Verify temperature within enclosure is not excessive
If the problem persists, replace module
118 ADC fault ADC test pattern failure If the problem persists, replace module
119 ADC neighbor 1.8V fault ADC detected out-of-range voltage on its partner If the problem persists, replace module
120 ADC channel config
mismatch
Dual ADCs are not configured the same If the problem persists, replace module
121 SPI sequence number
mismatch
Serial communication state machines are out of sync If the problem persists, replace module
122 Runtime 3.3V over/under
error
3.3V supply voltage was detected too high or too low If the problem persists, replace module
125 Field I/O power is missing 24V power is not within specification Check field power supply and wiring
126 Startup 3.3V over/under
error
OV-UV detector failed startup test If the problem persists, replace module
127 Sensor power/input wiring
error
Sensor power to input signal violation detected Check field wiring
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