Watlow 8LS Controller Manuel d'utilisateur Page 65
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Setup
8LS User’s Guide 57
Low RDG Display
Selectable range: 0-9999.
The low input reading is referenced to 60mV and is calculated using this
equation:
Linear Input Scaling Example:
Problem:
You want to connect a pressure sensor to be able to read pressure
directly in PSI. The sensor has an output of 4-20mA over a range of
100-400PSI. The 4-20mA is converted to 12-60mV. How will you set
the input scaling?
Solution:
1. Set the High PV to 400 and enter the units as P, S, and I.
2. Calculate the High RDG and enter it:
3. Set the Low PV to 100 and enter the units as P, S, and I.
4. Calculate the Low RDG and enter it:
1234 56 78
LOOP PROCESS UNITS
ALARM
SETPOINT
STATUS
OUTPUT%
1 LO RDG
? 0
LOW RDG = (1000)
(Sensor output @ Low PV)
60 mV
*
High RDG = 1000
(60 mV)
(60 mV)
*
Sensor output @ high PV
Full scale 8LS input
=1000
Low RDG = 1000
(12 mV)
(60 mV)
*
Sensor output @ low PV
Full scale 8LS input
=200
- User’s Guide 1
- Warranty 2
- Contents 3
- Using the 8LS 37 4
- Setup 45 4
- Tuning and Control 75 5
- Troubleshooting 85 6
- Appendix A: Ramp Soak 89 6
- Appendix B: 8LS-CP 105 7
- Appendix C: 8LS Cascade 121 7
- Glossary 123 7
- System Diagram 10
- 4 8LS User’s Guide 12
- Overview 12
- Introduction 13
- Installation 17
- Read This Before Installation 18
- Mounting The 8LS 19
- 12 8LS User’s Guide 20
- External Wiring 21
- General Wiring Requirements 21
- Cable Recommendations 23
- Noise Suppression 24
- 130 VAC ratin 25
- RTB Connections 27
- Analog Inputs 28
- Common Mode Voltage 28
- Normal Mode Voltage 28
- Grounding 28
- Input Scaling 29
- Resistor Installation 30
- Voltage Inputs 31
- Milliamp Inputs 31
- Thermocouple Inputs 31
- RTD Inputs 32
- Pulse Input 33
- Carbon Probe Input 33
- Control Outputs 35
- Pid Control Relay Outputs 36
- Primary Analog Outputs 37
- CPU Dip Switch 39
- RS-232 Connections 41
- RS-485 Description 42
- RS-485 Connections 43
- Using the 8LS 45
- Ramp/Soak 47
- Man/Auto 47
- Displays 48
- Single Loop Display 49
- Scanning Display 49
- Alarm Display 49
- SP ? 25 51
- 6 = AUTO 51
- SET? TUNE 51
- 6 SET MAN 52
- How to enter the Setup menus? 53
- How to edit a menu? 53
- (T/C & RTDs) 54
- 1 1 1 1 1 1 1 1 54
- GLOBALS? 55
- Save as Job 56
- Restore a Job 56
- Set Alarm Delay 56
- Set R/S Time Base 57
- Lock Panel 57
- Power Up Output Status 57
- CONTRLLR 58
- ADDR? 1 58
- COMM ERR 58
- CHK? BCC 58
- Communication Baud Rate 59
- Communication Protocol 59
- AC Line Frequency 59
- EPROM Version 60
- 1 SETUP 61
- INPUT? 61
- 1 INPUT 62
- TYPE? J 62
- 1 INPUT 63
- SMPLT? 1 63
- 1 INPUT 63
- UNIT = F 63
- Linear Scaling Menus 64
- High PV Display 64
- High RDG Display 64
- Low PV Display 64
- 1 LO RDG 65
- 1 OFFSET 66
- 1 SETUP 67
- CONTROL ? 67
- Heat/Cool PB 68
- Heat/Cool TI 68
- Heat/Cool TD 68
- Heat/Cool Output Filter 68
- 1 CONTROL 69
- SPR? 10 69
- OUTPUTS? 70
- 1 OUTPUTS 71
- CT ? 10 71
- ACT ?REV 72
- LIM ? 100 72
- LTM ? C 73
- NLO ?OFF 73
- 1 HT OUT? 74
- TERM BLK 74
- Setup Alarms 75
- Alarm Types 76
- Global Alarms 76
- Process Alarms 76
- High Process Alarm Setpoint 77
- High Process Alarm Status 77
- Deviation Band Alarm 78
- Deviation Band Alarm Status 78
- Low Process Alarm Setpoint 79
- Low Process Alarm Status 79
- Alarm Deadband 80
- Alarm Delay 80
- INS = 1 1 1 1 81
- TEST OUT 82
- NR = 1 82
- DIG OUT 82
- NR01? OFF 82
- Tuning and Control 83
- Control Modes 84
- Digital Output Control Forms 86
- Time Proportioning (TP) 86
- Output Digital Filter 87
- Reverse and Direct Action 87
- Integral Term (TI) Settings 89
- Derivative Term (TD) Settings 89
- Proportional Band Only (P) 90
- PI with Derivative (PID) 90
- 8LS User’s Guide 83 91
- 84 8LS User’s Guide 92
- Troubleshooting 93
- Computer Supervised Systems 94
- Communications Problems 95
- Serial Interface 95
- 88 8LS User’s Guide 96
- Appendix A: Ramp Soak 97
- Configuring Ramp/Soak 98
- Setting the R/S Time Base 99
- Editing R/S Parameters 99
- Choosing a Profile to Edit 99
- R/S PRO 100
- COPY? H 100
- A OUTTOL 100
- T? 1:00 100
- Editing the Ready Setpoint 101
- Editing a Segment 102
- Setting Segment Time 102
- A SEG 01 103
- SP? OFF 103
- EVENTS? 103
- Editing Event Outputs 104
- Changing Event States 104
- Editing Segment Triggers 104
- 1234 56 78 105
- Setting Segment Tolerance 106
- Ending a Profile 106
- Repeating a Profile 106
- 1 SELECT 107
- PROF? 0 107
- 1A00/20S 108
- SET? RUN 108
- 3 73 F 109
- 73 S 0 109
- Bar graph display 110
- Ramp/Soak Key Displays 110
- How long has the profile run? 110
- CYC 1/1 111
- SET?HOLD 111
- RESET? A 112
- Appendix B: 8LS-CP 113
- System Configuration 114
- Specifications 116
- CP Control 117
- Applications 118
- Carbon Probe 119
- Probe Burn Off 120
- Burn Off Function 121
- 1 INPUTS 122
- TYPE? K 122
- 2 INPUTS 122
- TYPE? CP 122
- CO+CO2% and % of Hydrogen 123
- Engineering Units 123
- 2 OFFSET 124
- ? 0 ºF 124
- 2 CP 124
- BURNOFF? 124
- Burn Off Time Interval 125
- Burn Off start Input 125
- Burn Off Time Period 126
- 2CP GAS 127
- OUTPN? 0 127
- 2 HIT %CP 127
- . 25 M 0 127
- 120 8LS User’s Guide 128
- Appendix C: 8LS Cascade 129
- Choosing the Primary Loop 130
- Glossary 131
- 132 8LS User’s Guide 140
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