Table 4-13 Procedure For Starting Tune (Demand) Tuning - Honeywell DC33XB User Manual

Starting TUNE (Demand Tuning)
After TUNE has been enabled use the following procedure to start tuning.

Table 4-13 Procedure for Starting TUNE (Demand) Tuning

Step
Set the setpoint to the desired value.
1
Switch to Automatic mode by pressing the Manual/Auto key.
2
Initiate Tuning by:
3
• pressing the
• pressing the Lower Display and
• using the digital input, if configured.
Aborting Tuning
If it is necessary to stop or abort the tuning process, press the MANUAL/AUTO key
and the controller will return to manual mode. You can also disable TUNE in the
ACCUTUNE Set Up group.
Tune for Duplex (Heat/Cool)
TUNE can be done for applications using duplex (heat/cool) control. During tuning,
Accutune requires that setpoint 1 will cause a Heating demand, and then the
calculated tuning parameters will be automatically entered as PID set 1. Likewise, it
requires that tuning at local setpoint 2 will cause a Cooling demand, and then the
cooling parameters will be entered as PID set 2.
The tuning sequence will cycle the controller's output two full cycles between the
high output limit and 50% for HEAT or between 50% and the low output limit for
COOL while allowing only a small process variable change above and below the
setpoint during each cycle.
Configuring TUNE for Duplex (Heat/Cool)
To configure this item, refer to Section 3 – Configuration.
12/00
Action
key when the lower display prompt = TUNE-OFF,
UDC3300 Basic Model: DC33XB User Manual
keys simultaneously, or
Operation
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