Rockwell Automation Publication 1734-UM013N-EN-P - September 2017 175
Get I/O Diagnostic Status from Modules in Logix Systems Appendix B
Table 19 - 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 Under 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 test 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 that 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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