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428
Analog I/O Units
Section 7-4
1 to 5 V
The 1- to 5-V range corresponds to the hexadecimal values 0000 to 1770 (0
to 6000). The entire data range is FED4 to 189C (
−
300 to 6300). Inputs
between 0.8 and 1 V are expressed as two’s complements. If the input falls
below 0.8 V, open-circuit detection will activate and converted data will be
8000.
0 to 20 mA
The 0- to 20-mA range corresponds to the hexadecimal values 0000 to 1770
(0 to 6000). The entire data range is FED4 to 189C (
−
300 to 6300). A negative
voltage is expressed as a two’s complement.
4 to 20 mA
The 4- to 20-mA range corresponds to the hexadecimal values 0000 to 1770
(0 to 6000). The entire data range is FED4 to 189C (
−
300 to 6300). Inputs
between 3.2 and 4 mA are expressed as two’s complements. If the input falls
below 3.2 mA, open-circuit detection will activate and converted data will be
8000.
1 V
5 V 5.2 V
0.8 V
FED4 (
−
300)
189C (6300)
1770 (6000)
0000 (0)
Converted Data
Hexadecimal (Decimal)
0 mA
20 mA 21 mA
−
1 mA
FED4 (
−
300)
189C (6300)
1770 (6000)
0000 (0)
Converted Data
Hexadecimal (Decimal)
4 mA
20 mA 20.8 mA
3.2 mA
FED4 (
−
300)
189C (6300)
1770 (6000)
0000 (0)
0 mA
Converted Data
Hexadecimal (Decimal)
Содержание CP1L - 12-2007
Страница 3: ...iv...
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Страница 13: ...xiv TABLE OF CONTENTS...
Страница 21: ...xxii...
Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 428: ...395 Clock Section 6 9...
Страница 429: ...396 Clock Section 6 9...
Страница 523: ...488 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...496 Replacing User serviceable Parts Section 10 2...
Страница 563: ...528 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...576 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...603 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...604 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...634 Index...
Страница 671: ...636 Revision History...