Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 106)

Publication 900-UM007D-EN-E - January 2011
3-36 Configuration & Basic Operation
In this example, the ST stable range will be configured to 20
°C.
EXAMPLE
Operation Procedure
1. Select the ST Stable Range parameter by pressing the
M key in the
Advanced Setting function group. To move to this function group, refer
to page 4-31, To Move to the Advanced Setting Function Group.
Figure 3.68
2. Set to 20
°C (deviation) using the U key. Note: The default is 15°C.
Figure 3.69
Note: Ensure the value is loaded into controller memory by waiting 2 seconds
or pressing the
O
key.
RT (Robust Tuning)
Figure 3.70
When Auto-Tuning (AT) or Self-Tuning (ST) is executed with Robust-Tuning
(RT) selected, PID constants are automatically configured by the controller
that make it difficult for control performance to degenerate even when control
object characteristics are frequently changing.
RT is configured in the Advanced Setting function group when the PID
control mode is selected.
The RT mode cannot be selected when an analog input is configured.
Selecting the RT mode in the following cases will help to prevent the
occurrence of hunting by the MV.
• When the set point temperature is often changed and varies in a wide
range
C st-b
1%0
ST stable
range
C st-b
2*0
r t