Watlow Series D8 - Manual (Page 5)

Series D8 User’s Guide Table of Contents
Doc. 0600-3120-2000 Watlow Anafaze iii
PV Retransmit Object 72
Ratio Object 73
Cascade Object 74
Global Object 75
4 Operation and Setup 77
General Navigation Map 77
Keypad 79
Displays 80
Loop Display 80
Alarm Displays 81
Job Display 83
Changing the Set Point 84
How to Manually Change the Set Point 84
Other Methods of Changing the Set Point 84
Changing the Control Mode and Output Power 85
Accessing and Navigating the Setup Menus 86
How to Access the Setup Menus 86
How to Edit a Setup Parameter 86
Setting Up Closed-Loop Control 87
Feedback 87
Control Algorithm 87
Control Output Signal Forms 87
Heat and Cool Outputs 87
How to Set Up Closed-Loop Control 88
Setting Up a Process Input 88
Input Scaling 88
Input Scaling Example: 4 to 20 mA Sensor 89
Input Scaling Example: 0 to 5 Vdc Sensor 90
Autotuning 91
How Does Autotuning Work? 91
Prerequisites 92
How to Autotune a Loop 92
Setting Up Alarms 93
Failed Sensor Alarms 93
Process Alarms 95
Global Alarm 97
Setting Up Process Variable Retransmit 97
How to Set Up Process Variable Retransmit 98
Process Variable Retransmit Example: Data Logging 98
Setting Up Cascade Control 100
How the Secondary Set Point is Determined 100
Proportional-Only Control on the Primary Loop 101
How To Set Up Cascade Control 102
Cascade Control Example: Water Tank 102
Setting Up Ratio Control 104
How to Set Up Ratio Control 105
Ratio Control Example: Diluting KOH 105
Setting Up Differential Control 106
How to Set Up Differential Control 107
Differential Control Example: Thermoforming 107
Setting Up Remote Analog Set Point 107
How to Set Up a Remote Analog Set Point 108
Remote Analog Set Point Example: Changing a Set Point with a PLC 108