Rockwell Automation PicoTM Controller 1760 Manual de usuario Pagina 31
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Publication 1760-UM001A-EN-P
Installation 2-13
Figure 2.6 20 mA Sensors
.
Connect 4 to 20 mA (0 to 20 mA) sensors using an external 500Ω resistor, as
shown above. The resultant impedance to the sensor is then approximately 478
Ω.
The following values result (Based on V = R x I = 478Ω x 10 mA = 4.8V dc):
• 4 mA = 1.9V dc
• 10 mA = 4.8V dc
• 20 mA = 9.5V dc
Connecting Outputs
The Q output terminals function as isolated contacts, as shown below.
Relay coils are controlled via the corresponding output relays Q1 to Q4 or Q1 to
Q6. You can use the signal states of the output relays as make or break contacts in
the Pico program to provide additional logic conditions.
The relay outputs are used to switch loads such as fluorescent tubes, filament bulbs,
contactors, relays or motors. Check the technical thresholds and output data before
installing such devices (see Relay Outputs on page A-5).
+24V
1A
0V
500Ω
4 to 20 mA
24V dc
+24 V COM I2 I3 I4 I5 I6 I7 I8I1
Inputs x 24V dc (I7,I8 0 to 10V)
Q1
Q1
12
Q1
- Pico™ Controller 1
- Important User 2
- Information 2
- Table of Contents 3
- Chapter 3 4
- Chapter 4 4
- Drawing a Circuit Diagram 4
- Chapter 5 5
- Saving and Loading Circuit 5
- Chapter 6 5
- Pico System Settings 5
- Table of Contents iv 6
- Table of Contents v 7
- Table of Contents vi 8
- Who Should Use this 9
- Purpose of this Manual 9
- Common Techniques 10
- Used in this Manual 10
- Rockwell Automation 10
- System Overview 11
- Hardware Versions 12
- Operating Principles 13
- LED Indicators 14
- Circuit Diagram 15
- Parameters 15
- Figure 1.6 System Menu 17
- WINTER TIME 18
- DAY : MO 18
- TIME: 01:25 18
- Installation 19
- Mounting 20
- Wiring Terminals 21
- Connecting the 22
- Incoming Power 22
- Using Surge 23
- Suppressors 23
- Connecting the Inputs 25
- L1 L2 I2 I3 I4 I5 I6 I7 I8I1 26
- 120/240V ac 26
- Inputs x 120/240V ac 26
- Increasing the Input Current 27
- Connecting DC Inputs 28
- Connecting Analog Inputs 28
- Installation 2-11 29
- Ω, e.g. 1K Ω 30
- Connecting Outputs 31
- Connecting Relay 32
- Commissioning 33
- Operating Modes 34
- Creating a Circuit 35
- Diagram (Program) 35
- Circuit Diagram Display 36
- Commissioning 3-5 37
- Wiring Inside of Your Program 38
- I1-I2-----{ Q 1 38
- I1-I2-------{Q1 38
- Commissioning 3-7 39
- Deleting a Circuit Diagram 40
- Fast Circuit Diagram Entry 40
- DELETE PROG 40
- Pico Operation 41
- Button Operation 42
- Opening the Parameter Display 42
- Contacts 43
- Memory Module 45
- PicoSoft 45
- Working with Contacts 46
- I1-Q4-I3 48
- I2-I4-{Q2 48
- I1-Q4-I3-{M1 48
- I2-I4-M1-{Q2 48
- Deleting a Circuit Connection 49
- Example 1 49
- Example 2 50
- Coil Functions 51
- I2---------{Q4 51
- Rules for Wiring Relay Coils 52
- Function Relay Types 54
- Hard-Wiring with Relays 55
- Using Circuit Diagram Forms 55
- Comment: 56
- Timing Relays 59
- Figure 4.5 Timing Diagram 62
- Timing Relays, Single Pulse 63
- Timing Relays, Flashing 63
- Counter Relays 64
- Programming a Counter Relay 65
- Determining Counter Frequency 66
- Parameters for Counters 66
- Time Switch 67
- Example 3 69
- Example 4 69
- Example 5 70
- Example 6 70
- Programming a Time Switch 70
- Analog Comparators 71
- Figure 4.13 Timing Diagram: 72
- ---------SQ3 73
- Pico text 74
- LCD Display 75
- Variables 75
- Function 75
- Text Entry 76
- Character Set 76
- Examples 76
- Example Programs 79
- I1-I2-I3-{Q1 79
- I1-I2-I3-{Q2 79
- Motor Start/Stop Circuit 81
- I1----------SQ1 81
- I2----------RQ1 81
- Pulse Value Reset 83
- Interface to Memory 89
- Module and 89
- Programming Cable 89
- Loading or Storing Programs 91
- Connecting Pico to the PC 93
- If You Have Trouble 93
- INVALID PROG 93
- Deleting 98
- Changing the Menu 99
- Language 99
- Changing Parameters 99
- Publication 1760-UM001A-EN-P 100
- Setting the Time 102
- Changing Between 102
- Winter/Summer Time 102
- (Daylight Saving Time) 102
- Activating Debounce 103
- (Input Delay) 103
- Activating and 104
- Deactivating P-Buttons 104
- Setting the Start-Up Behavior 105
- Possible Faults 106
- Retention 107
- Setting Retention 108
- Deleting Retentive 108
- Actual Values 108
- Transfer Retentive 109
- Behavior 109
- Retentive Auxiliary 110
- Relays (Markers) 110
- Impulse Relay 111
- M8-M14------{Q2 111
- I3------SM14 111
- M9---------RM14 111
- 7-6 Retention 112
- U = Supply voltage 112
- S/R Function 113
- Retentive Timing Relays 114
- Coil Function 115
- I1 Motor Enable 115
- Q2 Motor 115
- T8 Delay time 115
- Retention 7-11 117
- Time setting for T6, T7 117
- I1 Start lubrication 118
- Q1 Oil valve 118
- T8 Oil time 118
- Q1 Valve 119
- Retentive Up/Down 120
- Counters C7, C8 120
- Retention 7-15 121
- Lubricant 122
- 7-18 Retention 124
- Inside Pico 125
- Example: Do Not Wire Backward 126
- Determining Cycle Time 127
- I1---------TT1 128
- T1------{Q1 128
- T1------TT2 128
- T2------{Q2 128
- 1760-L18AWA Cycle Time 129
- Delay Times for Inputs 131
- -L12AWA-ND, -L18AWA) 132
- Inside Pico 8-9 133
- 8-10 Inside Pico 134
- Troubleshooting 135
- Possible Situations 136
- When Creating Circuit 136
- Diagrams 136
- Troubleshooting 9-3 137
- 9-4 Troubleshooting 138
- DC Simulator 139
- Installation Guidelines 140
- Specifications 141
- Electrical 142
- Power Supply 143
- 1760-L12BWB and -L12BWB-NC 144
- Relay Outputs 145
- φ= 0.4, 250V ac 146
- ≤ 150 ms, 24V dc 146
- ≤ 150 ms 24V DC 146
- Cycle Time 147
- Dimensions 148
- Circuit Diagram Form 149
- Timing relays 150
- Up/down counters 150
- Analog comparators 150
- Timing switches 150
- Glossary 151
- Glossary 2 152
- 2 Index 154
- Index 3 155
- Backwards 156
- XOR circuit 156
- Back Cover 158
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