Settings - Omron E5AN-H User Manual

Using ON/OFF Control
Hysteresis
Three-position
Control
3-7-2

Settings

Setting the PID ON/OFF Parameter
Operating Procedure
Operation Level
PV
C
25.0
100.0
58
• With ON/OFF control, hysteresis is used to stabilize operation when
switching between ON and OFF. The control output (heating) and control
output (cooling) functions are set in the Hysteresis (Heating) and Hystere-
sis (Cooling) parameters, respectively.
• In standard control (heating or cooling control), the setting of the Hystere-
sis (Heating) parameter in the adjustment level is used as the hysteresis
regardless of whether the control type is heating control or cooling con-
trol.
Reverse operation
Hysteresis (heating)
ON
OFF
Set point
• In heating/cooling control, a dead band (an area where both control out-
puts are 0) can be set to either the heating or cooling side. This makes it
possible to use 3-position control.
Reverse operation
Hysteresis (heating)
ON
Heating
side
OFF
Parameters
Symbol Parameter: level
s-hc
Standard or Heating/Cooling: Initial setting level
cntl
PID ON/OFF: Initial setting level
orev
Direct/Reverse Operation: Initial setting level
c-db
Dead Band: Adjustment level
hys
Hysteresis (Heating): Adjustment level
chys
Hysteresis (Cooling): Adjustment level
To execute ON/OFF control, set the Set Point, PID ON/OFF, and Hysteresis
parameters.
The following example shows how to change the PID ON/OFF parameter to
onof in the initial setting level.
1. Press the O Key for at least three seconds to move from the operation
level to the initial setting level.
PV
Dead band
Hysteresis (cooling)
Cooling
side
Set point
Section 3-7
PV
Application
Specifying control method
Specifying control method
Specifying control method
Heating/cooling control
ON/OFF control
ON/OFF control