E5AZ-R3HMLD datasheet(57/64 Pages) OMRON

57 / 64 page

E5EZ-PRR

Adjustment

To adjust the PID constants, run AT.

Settings for position

proportional control

When position proportional control is selected, "Closed/Floating", "Motor calibra-

tion", "Travel time", "Position proportional dead band", "Open/Close hysteresis",

"Operation at potentiometer input error", and "PV dead band" can be used.

Closed/Floating

•

Closed control

Control whereby a potentiometer is connected to feed back the amount of

opening of the valve.

•

Floating control

Control without feedback of the amount of opening of the valve. Control is

possible without connecting a potentiometer.

Motor calibration and travel time

Run "Motor calibration" when a potentiometer is connected for closed control or

floating control that monitors the amount of valve opening.

This will also automatically set the "Travel time", which is the amount of time from

when the valve is completely open to when the valve is completely closed.

When performing floating control without a potentiometer, it is necessary to man-

ually set the "Travel time". Set the travel time to the amount of time from when

the valve is completely open to when the valve is completely closed.

Position proportional dead band and

Open/Close hysteresis

The valve output hold interval (the duration of ON/OFF switching of open output

and closed output) is set in "Position proportional dead band", and the hysteresis

is set in "Open/Close hysteresis".

The relation to valve opening is shown below.

PV dead band

When the present value is inside the PV dead band, this function is used to per-

form control for PV = SP and stop unnecessary output when the PV is close to

the SP.

Operation at potentiometer input error Use this setting to select whether to stop control or switch to floating control and

continue when a potentiometer error occurs during closed control.

Dead band

−100%

OFF

100%

Open/close hysteresis

MV-Valve opening

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