Rockwell Automation 1785 PLC-5 User Manual Page 53
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- Table of contents
- TROUBLESHOOTING
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Instruction Set
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Instruction Description
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CMP
If the expression is true, this input instruction is true. The CMP instruction can perform these
operations: equal (=), less than (<), less than or equal (<=), greater than (>), greater than or
equal (>=), not equal (<>). Complex expressions (up to 80 characters) are valid with Enhanced
and ControlNet PLC–5 processors only.
Limit Test
LIM
If the Test value (N7:15) is >= the Low Limit (N7:10) and <= the High Limit (N7:20), this
instruction is true.
COMPARE
Expression
N7:5 = N7:10
CMP
LIMIT TEST (CIRC)
Low limit N7:10
3
Test N7:1 5
4
High limit N7:20
22
LIM
Low Limit Test High Limit LIM
0010T
–5510T
51110F
1000T
10 5 –5 F
10 11 5 T
- Quick Reference 1
- Conventions 4
- Front Panel – Enhanced 5
- PLC-5 Processors 5
- Hardware Components 6
- Front Panel – Ethernet 7
- ControlNet PLC-5 Processors 8
- Front Panel – Classic 9
- Comparison Chart for 10
- PLC-5 Family Processors 10
- Processor Comparison 1-7 11
- Any mix of I/O 11
- Processor Comparison 1-8 12
- Any mix of I/O 12
- Processor Comparison 1-9 13
- Processors 14
- Power Supply Modules 1-11 15
- Power Supplies 1-12 16
- Front Panel Keyswitch 17
- Processor Status File 18
- Processor Status File 1-15 19
- Processor Status File 1-16 20
- Processor Status File 1-17 21
- Processor Status File 1-18 22
- Processor Status File 1-19 23
- Processor Status File 1-20 24
- Processor Status File 1-21 25
- Processor Status File 1-22 26
- Processor Status File 1-23 27
- S:25 Reserved 28
- Processor Status File 1-25 29
- Processor Status File 1-26 30
- Processor Status File 1-27 31
- Processor Status File 1-28 32
- I/O Status File Format 33
- I/O Status File 1-30 34
- I/O Status File 1-31 35
- Addressing Data Table Files 37
- Data Table Files 2-2 38
- Data Table Files 2-3 39
- PLC-5 Memory 39
- Data Table 39
- Program Files 40
- I/O Image Addressing 41
- Logical Addressing 42
- Addressing 43
- N[N7:0] file number 43
- N7:[C5:7.ACC] element number 43
- B3:/[I:017] bit number 43
- I/O Addressing Modes 44
- Addressing Concept Summary 44
- Status Bits 3-1 45
- Relay Instructions 46
- Relay 3-3 47
- Relay 3-4 48
- Timer Instructions 49
- Timer 3-6 50
- Counter Instructions 51
- Counter 3-8 52
- Compare Instructions 53
- Compare 3-10 54
- Compare 3-11 55
- Compute Instructions 56
- Compute 3-13 57
- Compute 3-14 58
- Compute 3-15 59
- Compute 3-16 60
- Compute 3-17 61
- Compute 3-18 62
- Compute 3-19 63
- Compute 3-20 64
- Compute 3-21 65
- Logical Instructions 66
- Logical 3-23 67
- Conversion Instructions 68
- Conversion 3-25 69
- Bit Modify and Move 3-26 70
- Bit Modify and Move 3-27 71
- File Instructions 72
- File Instructions 3-29 73
- Diagnostic Instructions 74
- Diagnostic 3-31 75
- Shift Register Instructions 76
- Shift Register 3-33 77
- Shift Register 3-34 78
- Sequencer Instructions 79
- Program Control Instructions 80
- Program Control 3-37 81
- Program Control 3-38 82
- Program Control 3-39 83
- Program Control 3-40 84
- Processor and Message 3-41 85
- Processor and Message 3-42 86
- Block and 87
- ControlNet 87
- Transfer Instructions 87
- Block Transfer 3-44 88
- Block Transfer 3-45 89
- Block Transfer 3-46 90
- ASCII Instructions 91
- ASCII Instructions 3-48 92
- ASCII Instructions 3-49 93
- ASCII Instructions 3-50 94
- ASCII Instructions 3-51 95
- ASCII Instructions 3-52 96
- Pressed in at bottom 100
- Open (OFF) 100
- Pressed in at top 100
- Closed (ON) 100
- Complementary I/O 4-5 101
- To select: Set switch: To: 103
- Switch Settings 103
- Side View 104
- Ethernet Configuration 106
- NET ADDRESS 107
- Network address 01 107
- Switch Assembly 108
- Classic PLC-5 109
- Switch Assembly 2 4-15 111
- Remote I/O Rack Number 112
- Scanner Module, or VME System 112
- Switch Assembly 2 113
- I/O Rack Number 4-18 114
- (8-word groups) 115
- I/O Rack Number 4-20 116
- I/O Rack Number 4-22 118
- General Problems 5-1 121
- Enhanced, Ethernet 121
- General Problems 5-2 122
- Communication Channel 5-3 123
- Communication Channel 5-4 124
- Communication Channel 5-5 125
- Communication Channel 5-6 126
- Ethernet 5-7 127
- Ethernet PLC-5 127
- Status Indicators 128
- ControlNet 5-9 129
- ControlNet PLC-5 129
- ControlNet 5-10 130
- ControlNet 5-11 131
- General Problems 5-12 132
- General Problems 5-13 133
- Adapter Mode 5-14 134
- Scanner Mode 5-15 135
- Scanner Mode 5-16 136
- I/O RACK 137
- A B 148
- Extended Local I/O 5-29 149
- 1771 I/O ControlNet 149
- Extended Local I/O 5-30 150
- ControlNet I/O Status 150
- Extended Local I/O 5-31 151
- Extended Local I/O 5-32 152
- Extended Local I/O 5-33 153
- Extended Local I/O 5-34 154
- Error Messages 155
- Extended Local I/O 5-36 156
- ControlNet Errors 156
- Extended Local I/O 5-37 157
- Extended Local I/O 5-38 158
- Extended Local I/O 5-39 159
- Extended Local I/O 5-40 160
- Extended Local I/O 5-41 161
- Extended Local I/O 5-42 162
- Extended Local I/O 5-43 163
- Extended Local I/O 5-44 164
- Troubleshooting 165
- Additional Major Fault Codes 166
- ControlNet processor 166
- Extended Local I/O 5-47 167
- Fault Codes 167
- Extended Local I/O 5-48 168
- Extended Local I/O 5-49 169
- Extended Local I/O 5-50 170
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