Rockwell-automation 1771-OFE/B Analog Output Module User Manual Manuel d'utilisateur Page 32
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- DEPANNAGE
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
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Scaling is the conversion of unscaled data to engineering units--such
as gallons/minute, degrees centigrade, and pounds/square inch. You
can use the scaling feature to send the data for each channel to the
module in an optional scaled value representing actual engineering
units. This value is scaled by the module to a proportional binary
value before it is used by the corresponding channel. The resolution
of this data is one part in 4095.
The scaling feature is implemented by entering scaling values in the
data format selected in words 6 through 13 of the BTW.
Scaling Value Polarity
Bits 04 to 11 (04 to 13 octal) of the configuration word (word 5) in
the write block designate positive or negative scaling values
(Figure 3.2). By setting the appropriate negative scaling bit in word
5, you can scale negative data or enable a negative scaling value.
The sign bits are ignored if a corresponding channel is not scaled.
Figure 3.2
Location of Scaling Value Polarity Bits in the Block Transfer Write
Configuration Word
Word/Dec. Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Word/Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
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Maximum and Minimum Scaling Values
Words 6-13 of the write block transfer contain maximum and
minimum scaling values for each channel. Word 6 corresponds to
Channel 1 scale minimum, word 7 to Channel 1 scale maximum,
word 8 to Channel 2 scale minimum, and so on (Figure 3.3).
The maximum and minimum scaling values are the upper and lower
limits for output data. The module’s microprocessor reads these
values and automatically scales output data from the write block
transfer.
Scaling
- 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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