59
Using ON/OFF Control Section 3-7
Setting the SP
Operating Procedure In this example, the set point is set to 200.0. The set value (i.e., the SP) is
shown at the bottom of the display.
Setting the Hysteresis
Operating Procedure Set the hysteresis to 2.0°C.
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. Use the U and D Keys to set onof.
5. To return to the operation level, press the O Key for at least one second.
Next, set the set point value.
in-t
5
Input Type
cntl
pid
PID
•
ON/OFF
cntl
onoff
PID
•
ON/OFF
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 200.0.)
The new set value can be saved by pressing the M Key, or it will go into
effect after two seconds have elapsed. (The new set point will be reflected
in the current bank.)
Next, set the hysteresis.
C
25.0
100.0
PV/SP
C
25.0
200.0
Operation Level
1. Press the O Key to move from the operation level to the adjustment level.
Adjustment Level
2. The Adjustment Level Display parameter will be displayed in the adjust-
ment level.
3. Select the Hysteresis (Heating) parameter by pressing the M Key.
4. Press the U and D Keys to set the hysteresis (2.0 in this example). Ei-
ther press the M Key or wait for at least two seconds after setting the hys-
teresis value to confirm the setting.
5. To return to the operation level, press the O Key.
C
25.0
200.0
PV/SP
1.adj
Adjustment
Level Display
hys
1.0
Hysteresis
(Heating)
C
hys
2.0
C