Omron E5AR - MANUAL 2 User Manual

Section 3 Typical Control Examples
3-12
Typical Control
Examples
■ Settings for position proportional control
When position proportional control is selected, "Closed/Floating",
"Motor calibration", "Travel time", "Position proportional dead band",
"Open / Close hysterisis", "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 manually 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 hysterisis
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 hysterisis".
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 perform 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.
0
Dead band
-100%
OFF
ON
100%
MV - Valve opening
Open / close hysteresis
In the event that a break occurs in the O or C wires of the
potentiometer, potentiometer errors may not be detect-
able, thus this function (stop control or switch to floating
control) does not operate.
Important

Omron E5AR - MANUAL 2 Specifications

General

Brand	Omron
Model	E5AR - MANUAL 2
Category	Controller
Language	English