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4 Basic Operation
E5@C Digital Temperature Controllers User’s Manual (H174)
4-9 Determining PID Constants (AT, ST, Manual Setup)
4
4-9-3 RT (Robust Tuning) (Used for AT or ST.)
RT Features
• Even when hunting occurs for PID constants when AT or ST is executed in normal mode, it is less
likely to occur when AT or ST is executed in RT mode.
• When the temperature (PV) falls short of the set point for the PID constants when using AT or ST
in normal mode, executing AT or ST in RT mode tends to improve performance.
• When the manipulated variable (MV) is saturated, the amount of overshooting may be somewhat
higher in comparison to PID control based on AT or ST in normal mode.
This procedure selects RT mode.
Operating Procedure
1
Press the M Key several times in the Advanced Function
Setting Level to display rt (RT: robust tuning).
Advanced Function Setting
Level
2
Press the U or D Key to select on (RT ON).
The default is off.
Temperature
Temperature
Much hunting occurs.
Set value
Set value
Start of control
Start of control
Time
Time
Hunting is reduced.
Temperature
Temperature
Set value
Set value
Start of control Start of control
Time
Time
off
rt
on
rt