Rockwell-automation 1771-N SERIES High Resolution Analog Module User M Manuel d'utilisateur Page 78
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7–2 Troubleshooting
Publication 1771ĆUM127B-EN-P - December 2002
Table 7.A shows indications, probable causes and recommended
actions to correct common faults which may occur.
Table 7.A
Troubleshooting Chart
Indication Probable Cause Recommended Action
Both indicators are OFF
No power to module
Check power to I/O chassis.
Recycle as necessary.
Both indicators are OFF
Possible short on the module
LED driver failure
Microprocessor, oscillator or EPROM failure
RUN/FLT indicator ON red
If immediately after power-up, indicates RAM or
EPROM failure.
Replace module.
RUN/FLT indicator ON red
If during operation, indicates possible
microprocessor or backplane interface failure.
Internal fuse bad
RUN/FLT indicator is
flashing green
Power-up diagnostics successfully completed.
Normal operation.
RUN/FLT indicator is solid green Initial block transfer write successfully completed
CAL/COM indicator is green
(solid or flashing)
Normal operation None required
CAL/COM indicator is green and
RUN/FLT indicator is green but
module data is wrong (for
example, with cable off, input
channel data values are at
minimum scale values)
Internal module problem Replace module
Design your program to monitor module and channel status 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. The module sets a bit
(1) to indicate it has detected one or more of the following module
conditions as shown in Table 7.B.
The module sets a bit (1) to indicate it has detected one or more of
the following input channel conditions (Table 7.D), or output channel
conditions (Table 7.C).
Troubleshooting with
the Indicators
Status Reported by
the Module
- User Manual 1
- Important User Information 2
- ATTENTION 3
- Using this Manual 5
- Related Products 6
- Product Compatibility 6
- Related Publications 7
- Using this ManualP–4 8
- Table of Contents 9
- Chapter 4 10
- Configuring the Module 10
- Table of Contents toc-iii 11
- Table of Contentstoc-iv 12
- Table of Contents toc-v 13
- Table of Contentstoc-vi 14
- Overview of the High 15
- Resolution Isolated 15
- Analog Modules 15
- Features of the High 16
- Analog Series Modules 16
- Refer to 17
- Appendix 17
- Installing the Module 19
- Determine Module 20
- Location in the I/O Chassis 20
- Install the Analog Module 20
- Install the Module in the 21
- Chassis and Connect the 21
- Connecting Wiring 23
- • R = return 26
- • I = input 26
- • O = output 26
- • S = shield 26
- Connecting 4ĆWire 27
- Sourcing Input Analog 28
- Making Your Own Cables 29
- Grounding the Field 30
- Interpreting the 31
- Indicator Lights 31
- Chapter Summary 31
- 2–14 Installing the Module 32
- Communicating With Your 33
- Analog Module 33
- PLCĆ2 Programming 34
- PLCĆ3 Program Example 34
- PLCĆ5 and PLCĆ5/250 35
- Program Example 35
- Module Scan Time 36
- Programming Samples 36
- Setting Up the Data 39
- Table File 39
- Default Configurations 42
- Module Level 43
- Programming Features 43
- Real Time Sampling 45
- Output Channel 46
- Clamping 49
- Alarm Enable 50
- Reset State 50
- Input Channel 51
- Alarm Deadband 52
- Thermocouple Type 54
- Configuration Block for a 55
- Block Transfer Write 55
- Module Status and Input Data 61
- Block Transfer Read 62
- Data Format 62
- Data Header 63
- Input Status Data 64
- Output Status Data 66
- Module Calibration 69
- Calibrating Your Module 70
- Manual Calibration 71
- Figure 6.1 73
- Termination Panel 73
- Output Channel Calibration 75
- Troubleshooting 77
- Troubleshooting with 78
- Status Reported by 78
- Specifications 81
- Grounding Guidelines." 82
- Temperature Specifications 83
- SpecificationsA–6 86
- Important: If you require 60 87
- SpecificationsA–8 88
- Word/Dec. Bit 101
- Word/Octal Bit 101
- Transfer Read Configurations 105
- Series Modules 105
- CSA Hazardous Location 183
- Rockwell Automation Support 188
- Documentation Feedback 188
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