Position-Proportional Control; On/Off Control - Omron E5EK PROGRAMMABLE TYPE User Manual

CHAPTER 4 APPLIED OPERATION
J Position-propor-
tional control
8
Open
7
6
Close
5
O
17
W
16
C
15
Potentiometer
F Travel time
F Valve opening
monitor
F Manipulated vari-
able at reset/PV
error
F Other functions
4--4
• Use the position-proportional type controller for position-proportion-
al control.
• On a position-proportional type controller, control output 1 is used
for open output, and control output 2 is used for closed output. Ac-
cordingly, control outputs 1 and 2 cannot be used as output assign-
ments. Special output units are already set on position-proportional
type controllers.
• On a position-proportional type controller, the following functions are
disabled:
MV limitter
P and PD control
40% AT
LBA
HBA

ON/OFF control

• 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).
• Default is "30:30 seconds."
• 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, closed or hold can be selected as output at reset or PV error. Set
these outputs in the "MV at reset" or "MV at PV error" parameters
(level 2 mode).
• Set the dead band in the "position-proportional dead band" parame-
ter (level 1 mode). Default is "2.0:2.0%".
• Set the open/close hysteresis in the "open/close hysteresis" parameter
(level 2 mode).
ON
OFF
-100%
Open/close hysteresis
Dead band
MV-Valve opening
0 100%