Allen-Bradley 1794-OE8H Manual de usuario Pagina 9
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Publication 1797-6.5.1 - April 1999
Chapter
1
About the FLEX Ex Analog Modules
What this Chapter Contains
Read this chapter to familiarize yourself with the 1797-IE8 and 1797-OE8
analog modules.
What the FLEX Ex Analog
I/O Modules Do
The 1797-IE8 module accepts up to 8 analog inputs. The inputs are
non-isolated and will accept current in either of the following two ranges:
4-20mA or 0-20mA. The default input range is 0-20mA. The inputs have
both fixed hardware filters and selectable firmware digital filters.
Similarly, the 1797-OE8 module provides up to 8 analog outputs. The
outputs are nonisolated and will provide current in either of the following
two ranges: 4-20mA or 0-20mA. The default output range is 0-20mA.
Both modules offer:
• local microprocessor intelligence for advanced features
• full functionality without switches or jumpers
• multiple data ranges that can be independently programmed
in channel groups
• lead breakage detection
• overrange/underrange alarms
• remote transmitter alarm
as well as a host of other module features.
For information on: See page:
What the FLEX Ex Analog I/O
Modules Do
1-1
How FLEX Ex Analog Modules
Communicate with Programmable
Controllers
1-2
Physical Features of Your Analog I/O
Module
1-3
Chapter Summary 1-6
- User Manual 1
- Important User Information 2
- Using This Manual 3
- For Additional Information 4
- In Summary 4
- Table of Contents 5
- What the FLEX Ex Analog 9
- I/O Modules Do 9
- How FLEX Ex Analog Modules 10
- Communicate with 10
- Programmable Controllers 10
- Physical Features of Your 11
- Analog I/O Module 11
- Using Alarms on the 11
- 1797-IE8 Module 11
- Overrange Alarm 12
- Underrange Alarm 12
- Data Format Alarm Example 12
- Remote Fault Alarm 13
- Chapter Summary 14
- Analog Module Features 15
- Selecting a 1797-IE8 FLEX Ex 16
- Analog Input Module’s 16
- Operating Features 16
- High Low Error Level 17
- Input Filter Cutoff 17
- Data Format 18
- Data Formats and Error Ranges 20
- FLEX Ex analog I/O modules 20
- Selecting a 1797-OE8 FLEX Ex 21
- Analog Output Module’s 21
- Latch Retry Mode 22
- Global Reset 22
- Analog Digital State 22
- Analog Fault State 23
- Digital Fault State 23
- Fault Alarm 26
- Understanding Image Table 27
- Mapping and Bit/Word 27
- Descriptions 27
- Input Map (Read Words) 28
- Output Map (Write Words) 28
- Where:0 = disabled 29
- Where: ch = channel 30
- Flt Alm = Fault Alarm 30
- Res Flg = Response Flag 30
- What this Chapter Contains 33
- Before You Install Your 33
- Analog Module 33
- Compliance to European 34
- Union Directives 34
- Installation in Zone 1 35
- Electrostatic Charge 35
- Removal and Insertion 35
- Under Power 35
- Installing the Module 36
- Panel/Wall Mounting 39
- Label under here 41
- Connecting Wiring to the 43
- FLEX Ex I/O Analog Modules 43
- Grounding the Module 46
- ControlNet Network 47
- Using Programming Software 48
- About the ControlNet Ex 48
- Communication Over the 49
- FLEX Ex Backplane 49
- I/O Structure 50
- Adapter Status Word 51
- Fault State Data 52
- Device Actions 52
- Communication Fault Behavior 53
- Idle State Behavior 53
- Calibrating Your Module 55
- Tools and Equipment 56
- Using Calibration Module 56
- Command Words 56
- Calibrating Your Module 5-3 57
- 5-4 Calibrating Your Module 58
- Calibrating Your Module 5-5 59
- 10 23456789101112131415 60
- Calibrating Your Module 5-7 61
- Calibrating the 1797-OE8 62
- Calibrating Your Module 5-9 63
- Evaluate the Application 65
- Select Protection Method(s) 66
- Match Field Devices 67
- Cable_length 68
- Optimize Power Distribution 70
- Safe Area 71
- Hazardous Area 71
- Troubleshooting the FLEX Ex 73
- Analog I/O Modules 73
- Specifications 75
- I/O Entity Parameters 76
- 1797-OE8 Specifications 77
- Using RIO 79
- Using the PLC-5C Processor 80
- I-2 Index 82
- Allen-Bradley 83
- Publication Problem Report 83
- BUSINESS REPLY MAIL 84
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