Omron E5EK PROGRAMMABLE TYPE User Manual page 67

J ON/OFF control
F Hysteresis
• ON/OFF control is selected by the "PID/ON/OFF" parameter (expan-
sion mode). When this parameter is set to [
trol is selected, and when set to [
The "ON/OFF control" parameter is factory-set to [
• During position-proportional control, ON/OFF control cannot be se-
lected.
• In ON/OFF control, hysteresis is provided in the program when
switching between ON and OFF to stabilize operation. The hysteresis
width provided during ON/OFF control is simply referred to as "hys-
teresis." Control output (heat) and control output (cool) functions are
set in the "hysteresis (heat)" and "hysteresis (cool)" parameters, re-
spectively.
• In standard control (heating or cooling control), hysteresis can be set
only for the heating side.
ON
OFF
• In heating and cooling control, a dead band can be set. So, 3-position
control is made possible.
Hysteresis (heat)
ON
Heating
side
OFF
4.1 Selecting the Control Method
], ON/OFF control is selected.
Hysteresis (heat)
PV
Set point
Dead band
Hysteresis (cool)
Cooling side
Set point
], advanced PID con-
].
PV
4--5