49
Using ON/OFF Control Section 3-7
Parameters
3-7-2 Settings
To execute ON/OFF control, set the Set Point, PID ON/OFF, and Hysteresis
parameters.
Setting the PID ON/OFF Parameter
Operating Procedure Confirm that the PID ON/OFF parameter is set to onof in the initial setting
level.
Setting the SP
Operating Procedure In this example, the set point is set to 200. The set value (i.e., the SP) is
shown at the bottom of the display.
Symbol Parameter: level Application
s-hc
cntl
orev
c-db
hys
chys
Standard or Heating/Cooling: Initial setting level
PID ON/OFF: Initial setting level
Direct/Reverse Operation: Initial setting level
Dead Band: Adjustment level
Hysteresis (Heating): Adjustment level
Hysteresis (Cooling): Adjustment level
Specifying control method
Specifying control method
Specifying control method
Heating/cooling control
ON/OFF control
ON/OFF control
Operation Level
1. Press the O Key for at least three seconds to move from the operation
level to the initial setting level.
Initial Setting Level
2. The Input Type parameter is displayed in the initial setting level.
3. Select the PID ON/OFF parameter by pressing the M Key.
4. Check that the set value is onof (i.e., the default).
5. To return to the operation level, press the O Key for at least one second.
Next, set the set point value.
C
25
100
P
Operation Level
1. Select the Process Value/Set Point parameter in the operation level.
2. Use the U and D Keys to set the SP. (In this example, it is set to 200.)
The new set value can be saved by pressing the M Key, or it will go into
effect after two seconds have elapsed.
Next, set the hysteresis.
C
25
100
PV/SP
C
25
200