4.1 Selecting the Control Method
E5EK
4--3
• Use the position-proportional type controller for position-propor-
tional control.
• On a position-proportional type controller, control output 1 is used
for open output, and control output 2 is used for close output. Accord-
ingly, control outputs 1 and 2 cannot be used as output assignments.
Special output units are already set on p osition-proportional type
controllers.
• On a position-proportional type controller, the following functions are
disabled.
ST
MV limiter
P and PD control
40% AT
LBA
HBA
ON/OFF control
• Thetraveltimeisfactory-setto“30seconds.”
• To change the travel time, either set in the “travel time” parameter
(option mode), or execute motor calibration in the “motor calibra-
tion” parameter (option mode).
• The valve opening can be monitored when a potentiometer is con-
nected to the controller. However, be sure to execute motor calibra-
tion after connecting the potentiometer.
• Open, close or hold can be selected as output at stop or PV error. Set
these outputs in the “manipulated variable at stop” or “manipulated
variable at PV error” parameters (level 2 mode).
• Set the dead band in the “position-proportional dead band” parame-
ter (level 1 mode).
• Set the open/close hysteresis in the “open/close hysteresis” parameter
(level 1 mode).
Open/close hysteresis
Dead band
MV--Valve opening
100%0-100%
OFF
ON
JPosition-propor-
tional control
F Travel time
F Valve opening
monitor
F Manipu lated vari-
able at sto p/PV
error
F Other functions
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