User`s guide

Series D8 User’s Guide Chapter 4: Operation and Setup
Doc. 0600-3120-2000 Watlow Anafaze 85
Changing the Control Mode and Output Power
The D8 has four control modes:
• Off: Outputs are at 0%.
• Automatic: The controller automatically adjusts the out-
put power according to the set point, process variables
and other control parameters.
• Manual: You set the output power level.
• Autotune: The controller calculates the best PID settings
for optimum control. For more information, see Autotun-
ing on page 91.
To change the control mode and output power level, start at
the loop display and do the following:
1. Press p to choose the appropriate loop.
2. Press . twice. The Mode parameter should appear. (If
nothing happens, the keypad may be locked; see Keypad
Lock on page 129).
NOTE! If the heat and cool outputs are disabled on
this loop, the Mode parameter is not avail-
able. Instead, this message appears:
3. Press > or < to choose a control mode. If you make a
change and want to cancel it, press x.
4. Press . to save the new value.
5. If you chose manual mode, then the next parameter is the
Heat output or Cool output parameter. Use these param-
eters to set the heat and cool output power levels, then
press . to save.
6. You should be back at the loop display. The control
mode is shown on the second line of the loop display; see
Table 4.1 on page 80.
l01 Mode r
outputs disabled