Rockwell-automation 1771-OFE/B Analog Output Module User Manual Manuel d'utilisateur Page 58
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Channel Calibration
1. Disconnect your analog device wires from the module’s field
wiring arm.
Important: If you have a spare or unused field wiring arm, you may
want to temporarily switch it with the module’s present
field wiring arm. You can use this spare arm for test
purposes in order to avoid disconnecting your analog
device wires.
Important: The accuracy of this calibration procedure is dependent
upon the precision of your load resistors. We suggest
using resistors with a tolerance of 0.01%. You should
be able to attain voltage readings to +
2mV. (If you use
resistors of a value different from 250 ohms, you should
be able to attain voltage readings of +
0.05% of V out.)
If you require greater accuracy, you need to use load
resistors with tolerances less than 0.01%.
Use load resistors with values of 250 ohms. For greater accuracy,
you can use a resistor that more closely approximates your actual
device load.
2. Attach a resistor with a value of 250 ohms across Channel 1 (the
top two screws) of the field wiring arm.
3. Attach three more 250 ohm resistors across the remaining three
channels on the field wiring arm just as you did in step 2
(Figure 6.4).
Figure 6.4
Resistor Placement on Field Wiring Arm
!!" !
- 1
- 1
- Important User Information 2
- 3
- SOC-2 Summary of Changes 4
- Manual's Purpose 5
- Audience 5
- Vocabulary 5
- Manual Organization 5
- Related Products 6
- Product Compatibility 6
- Related Publications 6
- 7
- Chapter 4 8
- Chapter 5 8
- Chapter 6 8
- Chapter 7 8
- Specifications 9
- Block Transfer with 9
- MiniĆPLCĆ2 and PLCĆ2/20 9
- Processors 9
- Table of Contents 10
- Overview of the Analog Output 11
- How Analog Modules 13
- Communicate with 13
- Programmable Controllers 13
- Accuracy 13
- Chapter Summary 13
- 15
- Calculating Power 16
- Requirements 16
- Determine Module 17
- Location in the I/O Chassis 17
- Setting Module 17
- Configuration Jumpers 17
- • the module faults 19
- Install the Keying Bands 21
- Install the Module and Field 22
- Wiring Arm 22
- Connect the Wiring 23
- Ground the Chassis and 24
- Interpreting the Indicator 25
- Configuring Your Output 27
- Configuration Word 29
- Default Configuration 30
- Data Format 30
- Scaling Value Polarity 32
- Figure 3.3 33
- Procedure for Configuring 35
- Your Module 35
- 37
- Block Transfer 38
- Programming Ć PLCĆ2 38
- Family Processors Only 38
- PLC-2 Family Example Program 39
- Table 4.A 40
- Data Table Map 40
- Data Table MAP (128Ćword) 40
- Table 4.B 41
- PLCĆ2 Family Data Table Word 41
- Programming Ć PLCĆ3 42
- Figure 4.4 43
- Programming Ć PLCĆ5 44
- Other Programming 46
- Considerations 46
- Timer/Counter 48
- Accumulated Values 48
- System Expansion 49
- Recommendations Ć PLCĆ2 49
- Processors Only 49
- 51
- Calibrating Your Output 53
- Voltage Output Version 54
- (1771ĆOFE1) 54
- Figure 6.1 55
- Figure 6.2 55
- Figure 6.3 56
- Current Output Version 57
- (1771ĆOFE2) 57
- Channel Calibration 58
- Figure 6.5 59
- Figure 6.6 60
- Location of Resistor Pots 60
- Table 6.C 60
- Resistor Pots 60
- (1771ĆOFE3) 61
- Figure 6.7 62
- Diagnostics and 65
- Troubleshooting 65
- Read Block Transfer 66
- Status Words 66
- 69
- Appendix 71
- Rungs 2 and 3 72
- Rung Summary 72
- Setting the Block Length 73
- (Multiple GET Instructions 73
- Data Table Formats 75
- SignedĆmagnitude Binary 76
- Two's Complement Binary 77
- Table of Contents 80
- AllenĆBradley 81
- Publication Problem Report 81
- BUSINESS REPLY MAIL 82
- Support Services 83
- Worldwide representation 84
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