Spectrum-controls 1769sc-IF8u User Manual download pdf (Page 80)

70 Compact IO

™

Universal Input Modules

Negative Decimal

Values

In two’s complement notation, the far left position is always 1 for negative

values. The equivalent decimal value of the binary number is obtained by

subtracting the value of the far left position, 32768, from the sum of the

values of the other positions. In the figure below (all positions are 1), the

value is 32767 - 32768 = -1. For example:

1111 1000 0010 0011 = (2

) - 2

(16384+8192+4096+2048+32+2+1) - 32768 = 30755 - 32768 = -2013

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 125 126

NIVERSAL 1
Important Notes 3
Table of Contents 5
Conventions Used in 10
This Manual 10
Input Type Ohm s 11
2 Compact IO 12
Universal Input module 12
Univ ersa l 13
Do Not Remove RTB Un der 13
Power Unless Area is Non 13
Haza rdou s 13
Calibration 15
6 Compact IO 16
Chapter 1: Module Overview 7 17
8 Compact IO 18
Before You Begin 19
Required Tools and 19
Equipment 19
What You Need To Do 19
12 Compact IO 22
Chapter 3 22
(Installation and Wiring) 22
Junctions 23
16 Compact IO 26
Compliance to 27
European 27
Union Directives 27
Power Requirements 28
Considerations 28
System Assembly 30
Mounting 32
Replacing a Single 34
Module within a 34
26 Compact IO 36
28 Compact IO 38
(1.63 to 0.65 mm) 38
Cold Junction 40
Compensation 40
32 Compact IO 42
34 Compact IO 44
36 Compact IO 46
38 Compact IO 48
Bit 1514131211109876543210 49
40 Compact IO 50
42 Compact IO 52
44 Compact IO 54
46 Compact IO 56
48 Compact IO 58
50 Compact IO 60
52 Compact IO 62
54 Compact IO 64
56 Compact IO 66
Chapter 5 67
Module Operation 68
Operation 68
Power-up 68
Diagnostics 68
Channel Diagnostics 69
Module Error 71
Definition Table 71
Error Codes 72
Module Inhibit 73
Function 73
64 Compact IO 74
Electrical Specifications 75
1769sc-IF8U 75
66 Compact IO 76
68 Compact IO 78
70 Compact IO 80
Universal Input Modules 80
74 Compact IO 84
76 Compact IO 86
78 Compact IO 88
80 Compact IO 90
82 Compact IO 92
84 Compact IO 94
86 Compact IO 96
ReferencesReferences 98
References 98
90 Compact IO 100
Universal Input Module 100
92 Compact IO 102
94 Compact IO 104
102 Compact IO 112
104 Compact IO 114
106 Compact IO 116
108 Compact IO 118
110 Compact IO 120
112 Compact IO 122
114 Compact IO 124
Getting Technical 125
Assistance 125
Declaration of 125
Conformity 125

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