Troubleshooting and Maintenance, Status LED | Eaton Electrical D77A

Intelligent Technologies (IT.) D77A I/O Module Products

Troubleshooting and Maintenance

Status LED

The status LED is located on the upper left of the D77A I/O module as pictured in Figure 1,

Module Component Location. The LED’s status changes depending on the state of the I/O module.

Table 26: Status LED

State

LED Behavior

No Power

OFF

Power-Up Routine

OFF – CRC corrupt

Off-Line, OK (mostly off)

On-Line (mostly on)

Faulted (50%)

Identify device (burst)

Undiscovered

Fault Codes

Table 27: Analog 10 Fault Codes

0 x 41 (65)	Analog input over range.

0 x 42 (66)	Analog input under range.

0 x 44 (68)	Analog input open.

0 x 45 (69)	Analog input shorted.

MN05002001E

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Eaton Electrical D77A user manual Troubleshooting and Maintenance, Status LED, Fault Codes, State LED Behavior

Contents

D77A-AI8D77A-AI8AQ8 Intelligent Technologies IT D77A I/O Module ProductsPage Important Notice Please Read Table of Contents List of Tables List of FiguresPage Hazardous High Voltage SafetyDefinitions and Symbols Avis Aviso General Safety All Modules IntroductionDiscrete Input Modules Discrete Output Modules Analog Input Modules Discrete Combination ModulesAnalog Output Modules Approval Certifications Catalog Numbering System D77A a Q 16 Physical Description Specifications Surge Suppression Dimensional DataPower Requirements Device Default I/O Data Environmental SpecificationsCategory Description Specification Bit Byte Type I/O Description Module SummaryVoltage Part Number Catalog Number D77A-AI8 D77A-AI16 Input SpecificationsAC Input Module Specifications Catalog Number D77A-DI8 D77A-DI16 DC Input Module Specifications D77A-NI4 Catalog Number Voltage Input Current Loop Input Analog Input Module Specifications See D77A-NI4 Analog Input Module Specifications on Bit Resolution Equations Catalog Number D77A-AQ8 D77A-AQ16 Output SpecificationsAC Output Module Specifications Catalog Number D77A-DQ8 D77A-DQ16 DC Output Module Specifications Catalog Number D77A-RQ8 D77A-RQ16 Relay Output Module Specifications D77A-NI4 Catalog Number Voltage Output Current Loop Output Analog Output Module Specifications Analog Output Curves for 14 Bit Resolution Catalog Number DC Sink/Source Input DC Mosfet Sink Output Special I/O SpecificationsCombination Module Specifications Catalog Number DC Sink/Source Input Relay Output D77A-DI8RQ8 Catalog Number AC Input AC Output D77A-AI8AQ8 Catalog Number AC Input Relay Output D77A-AI8RQ8 Typical Application Out-of-box Default OperationTheory of Operation Discrete Input Module Operation Function Discrete Combination Module Operation ADC CPU Filter Setting Total Update Time CPU DAC Setting Group ID Installation Module Preparation Installation Without Backplane Installing the Module Installation With Backplane Do not rock the module onto the DIN rail Interconnects/Connections QCPort Connections Pre-manufactured QCPort Interconnect Cables O Property Configuration Symbol Definition Field Wiring MOV AC Inputs AC Input Wiring DC Inputs DC Input Wiring Analog Inputs Analog Input Wiring AC Outputs AC Output Wiring DC Outputs DC Output Wiring Relay Outputs Relay Output Wiring Analog Outputs Analog Output Wiring Combination I/O Combination I/O Wiring Fault Codes Troubleshooting and MaintenanceStatus LED State LED Behavior Communication Troubleshooting Hints TroubleshootingRenewal Parts Explanation of LED Duty Cycle States Status LED Description Explanation Problem SolutionCommunication Hints Data Parameters Appendix aSize Description Byte Bit Sign Bit = True = False + Mode Description Active/Passive Configuration Parameters 0x8006 32774 Slave Address Timer will not decrement Analog Data Registers IT. Publications and SupportPublications Publication Description Company Information