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Omron E5CN User Manual

Omron E5CN
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52
Determining PID Constants (AT, ST, Manual Setup) Section 3-8
100% AT
Operation will be as shown in the following diagram, regardless of the devia-
tion (DV) at the start of AT execution. To shorten the AT execution time, select
100% AT.
Note The Limit Cycle MV Amplitude parameter is disabled.
Operating Procedure This procedure executes 40%AT.
3-8-2 ST (Self-tuning)
ST (self-tuning) is a function that finds PID constants by using step response
tuning (SRT) when Controller operation begins or when the set point is
changed.
Once the PID constants have been calculated, ST is not executed when the
next control operation is started as long as the set point remains unchanged.
ST (self-tuning) is enabled when the ST parameter is set to ON in the initial
setting level.
When the ST function is in operation, be sure to turn the power supply of the
load connected to the control output ON simultaneously with or before starting
Controller operation.
When executing self-tuning, turn ON power for the load (e.g., heater) at the
same time as or before supplying power to the Digital Temperature Controller.
If power is turned ON for the Digital Temperature Controller before turning ON
power for the load, self-tuning will not be performed properly and optimum
control will not be achieved.
SP
PV
AT started AT ended
Time
Limit Cycle MV
Amplitude 100%
Adjustment Level
1. Press the O Key to move from the operation level to the adjustment level.
2. Press the U Key to select at-1. The No. 1 display for AT Execute/Cancel
will flash during AT execution.
3. off will be displayed when AT ends.
Operation Level
4. To return to the operation level, press the O Key.
at
off
AT Execute/
Cancel
at
at-1
at
off
C
25
0
PV
st

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Omron E5CN Specifications

General IconGeneral
CommunicationRS-485 (optional)
MountingPanel Mount
Control MethodON/OFF
Input TypeThermocouple, RTD
Supply Voltage100 to 240 VAC
Output TypeRelay, Voltage (for driving SSR), Current
Display Type7-segment LED
Size48 x 48 mm
Control OutputRelay, Voltage (for driving SSR), Current
Alarm Output1 or 2 outputs
Dimensions48 x 48 x 78 mm
Ambient Operating Temperature-10 to 55°C
Protection RatingIP66

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