Rockwell-automation 1746-NI8 SLC 500 Analog Input Modules User Manual Instrukcja Użytkownika Strona 50
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Oceniono. / 5. Na podstawie oceny klientów
5–9
Channel Configuration, Data, and Status
Publication
17466.8 - April 1997
Scaled-for-PID to “Real” Units
Situation: A
transducer is being used to measure temperature.
The 4–20 mA signal is proportional to 100–500°C (212–932°F).
The channel data word is in scaled-for-PID format.
The channel data = 5500.
Find:
“Real” units equivalent in
°F.
Equation:
Real Units EquivalentS
LOW
(
S
HIGH
S
LOW
)
channel data value
full scale default PID value
where: S
LOW
= 212
°F
S
HIGH
= 932
°F
channel data word = 5500
full scale PID default value (from table on page 5–6) = 16383
Solution:
RealUnitsEquivalent212°F
(
932°F212°F
)
5500
16383
453.71°F
Proportional Counts to “Real” Units
Situation: A
transducer is being used to measure pressure.
The –10V dc to +10V dc signal is proportional to 0 to 200 psi.
The channel data word is in proportional counts data format.
The channel data = 21567.
Find:
“Real” units equivalent in psi.
Equation:
Real Units EquivalentS
LOW
(
S
HIGH
S
LOW
)
data value
proportional count low default value
proportional count full scale default value
where: S
LOW
= 0 psi
S
HIGH
= 200 psi
channel data = 21567
proportional count low default value (from table on page 5–6) = –32768
proportional count full scale default value (from table on page 5–6) = 65535
Solution: Real Units Equivalent0 psi
200 psi0 psi
21567
-32678
(
65535
)
165.55 psi
- SLC 500t 1
- Input Module 1
- AllenBradley 1
- Important User 2
- Information 2
- Table of Contents 3
- Table of Contentsii 4
- Table of Contents iii 5
- Table of Contentsiv 6
- Who Should Use this 7
- Purpose of this Manual 7
- Contents of this Manual 8
- Related Documentation 9
- Common Techniques Used in 10
- AllenBradley Support 10
- Overview 11
- Hardware Features 12
- System Overview 13
- (shown for one channel) 14
- Quick Start 15
- Procedures 16
- sensor cable 17
- 1011 00000000 18
- Program the configuration 19
- 0000 00000000 20
- 1011 00000000000 21
- Installation and Wiring 22
- Module Location in Chassis 23
- Compliance to European 24
- Union Directives 24
- Module Installation and 25
- Module Installation Procedure 26
- Terminal Wiring 27
- Publication 28
- 17466.8 - April 1997 28
- Input Devices 30
- Preliminary Operating 32
- Considerations 32
- Class 1 and Class 3 33
- Interface 33
- Module Addressing 33
- Class 3 Memory Map 34
- O : 4 . 2 35
- I : 4 . 10 35
- Module Update Time 36
- Channel TurnOn, TurnOff 37
- Response to Slot Disabling 37
- Channel Filter Frequency 38
- Selection 38
- Channel Configuration, Data 42
- Channel Configuration 43
- Procedure 43
- Channel Data Word 46
- Scaling the 47
- Scaling Examples 49
- " TIP 49
- Channel Status Checking 52
- 10 V dc 53
- Input Type Status (Bits 0-2) 54
- Channel Status (Bit 11) 54
- Open Circuit Error (Bit 12) 55
- OverRange Error (Bit 13) 55
- UnderRange Error (Bit 14) 55
- Configuration Error (Bit 15) 55
- 1100 00110100 56
- Interfacing to the PID 58
- Instruction 58
- Monitoring Channel Status 59
- Bits (Class 3 Mode Only) 59
- Module Diagnostics and 60
- Troubleshooting 60
- LED Indicators 61
- Module Status LED (Green) 63
- Troubleshooting Flowchart 64
- Replacement Parts 65
- Contacting AllenBradley 65
- Application Examples 66
- Program Listing 68
- Data File 68
- Supplementary Example 69
- 1112131415 71
- 910 8 67450123 71
- Bit Number 71
- Specifications 76
- TTL:Chap 77
- +85°C (-40°F to +185°F) 77
- Configuration Worksheet 78
- Converting from 1746NI4 to 79
- 1746NI8 79
- 1100 01111000 81
- 1100 01100000 81
- Two's Complement Binary 82
- Glossary 84
- GlossaryG–2 85
- Glossary G–3 86
- Worldwide representation 91
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