Watlow Series D8 - Manual (Page 102)

Chapter 4: Operation and Setup Series D8 User’s Guide
84 Watlow Anafaze Doc. 0600-3120-2000
Changing the Set Point
How to Manually Change the Set Point
Start at the loop display and follow these steps:
1. Press p to choose the appropriate loop.
2. Press .. The Set point parameter should appear. If noth-
ing happens, the keypad may be locked; see Keypad
Lock on page 129. Also, the Set point parameter is not
available if cascade control or ratio control is enabled on
the loop.
3. Press > or < to adjust the set point value.
4. Press , to save the value and return to the loop display,
or
press p to save the value and switch to the set
point for another loop, or press x to cancel changes.
5. On the loop display, the new set point value is shown on
the second line.
Other Methods of Changing the Set Point
You can use other methods to change the set point:
•
Cascade Control:
Use the output of one loop to adjust
the set point of another loop. See Setting Up Cascade
Control on page 100.
•
Ratio Control:
Use the process variable of one loop,
multiplied by a ratio, as the set point of another loop. See
Setting Up Ratio Control on page 104.
•
Differential Control:
Use the process variable of one
loop, plus an offset value, as the set point of another loop.
See Setting Up Differential Control on page 106.
•
Remote Analog Set Point:
Use an external device such
as a PLC to control the set point. See Setting Up Remote
Analog Set Point on page 107.
•
Communications:
Use a computer program or operator
interface panel to change the set point. See Chapter 3:
Communicating by DeviceNet.
01 925 ˚Cc 0
1000manh100
Set Point