4 - 21
4 Basic Operation
E5@C-T Digital Temperature Controllers User’s Manual (H185)
4-5 Selecting PID Control or ON/OFF Control (Not Supported for
Position-proportional Models.)
4
4-5 Selecting PID Control or ON/OFF
Control (Not Supported for
Position-proportional Models.)
Two control methods are supported: 2-PID control and ON/OFF control. Switching between 2-PID con-
trol and ON/OFF control is executed by means of the PID ON/OFF parameter in the initial setting level.
When this parameter is set to pid, 2-PID control is selected, and when set to onof, ON/OFF control, is
selected. The default is pid.
z 2-PID Control
PID control is set by AT (auto-tuning) or manual setting.
For PID control, set the PID constants in the Proportional Band (p), Integral Time (i), and Derivative
Time (d) parameters.
For heating and cooling control, also set the Proportional Band (Cooling) (c-p), Integral Time
(Cooling) (c-i), and Derivative Time (Cooling) (c-d).
z ON/OFF Control
In ON/OFF control, the control output is turned ON when the process value is lower than the current
set point, and the control output is turned OFF when the process value is higher than the current set
point (reverse operation).
z Related Parameters
Setting the Control Method
Set the control method to 2-PID control. The default is 2-PID control.
Parameter name Display Setting range Default Level
PID ON/OFF cntl pid: 2-PID control
onof: ON/OFF
pid Initial Setting Level
Operating Procedure
1
Press the M Key several times in the Initial Setting Level to
display the PID ON/OFF parameter.
Initial Setting Level
2
Press the U or D Key to select pid (2-PID control).
The default is pid (2-PID control).
pid
cntl
PID ON/OFF
pid
cntl
To Next Page
Loading...
Need help?
General
