English (GB)
19
Fig. 9 Hunting (repeated activation-deactivation cycles)
Changing the controller type
1. Select "Type:" with the [Up] and [Down] buttons. Confirm with
[OK].
2. Select "PID", "2-P" or "None" with the [Up] and [Down]
buttons. Confirm with [OK].
– "None" deactivates the controller.
Changing the proportional part of the PID controller
1. Select "Kp [%]:" with the [Up] and [Down] buttons. Confirm
with [OK].
2. Change the proportional part value with the [Up], [Down],
[Left] and [Right] buttons. Confirm with [OK].
Changing the integral part of the PID controller
1. Select "Ti [s]:" with the [Up] and [Down] buttons. Confirm with
[OK].
2. Change the integral part value with the [Up], [Down], [Left]
and [Right] buttons. Confirm with [OK].
Disabling the integral part of the PID controller
1. Select "Ti [s]:" with the [Up] and [Down] buttons. Confirm with
[OK].
2. Press the [Function] button and confirm with [OK] again to
disable "Ti [s]:".
– The displayed value is "++++++.++".
Changing the derivative part of the PID controller
1. Select "Td [s]:" with the [Up] and [Down] buttons. Confirm with
[OK].
2. Change the derivative part with the [Up], [Down], [Left] and
[Right] buttons. Confirm with [OK].
Disabling the derivative part of the PID controller
1. Select "Td [s]:" with the [Up] and [Down] buttons. Confirm with
[OK].
2. Press the [Function] button and confirm with [OK] again to
disable "Td [s]:".
– The displayed value is "0.00".
Disturbance control
The function of disturbance control (compound-loop control) is
defined by following equation:
Controller output value with disturbance control = controller
output value * Source value * "D. factor:".
Example:
• The controller output value is 50 %
• The source is the analog input with 1.2 mA
• The disturbance factor is 0.5
The new controller output is:
Controller output value with disturbance control = 50 [%] * 1.2
[mA] * 0.5 [1/mA] = 30 [%]
Assigning the disturbance control to an input (parameter)
1. Select "Disturb.:" with the [Up] and [Down] buttons. Confirm
with [OK].
2. Change the input for disturbance control with the [Up] and
[Down] buttons. Confirm with [OK].
Changing the disturbance factor
1. Select "D. factor:" with the [Up] and [Down] buttons. Confirm
with [OK].
2. Change the disturbance factor with the [Up], [Down], [Left]
and [Right] buttons. Confirm with [OK].
Changing the direction of the controller
1. Select "Direction:" with the [Up] and [Down] buttons. Confirm
with [OK].
2. Select "up" or "down" with the [Up] and [Down] buttons.
Confirm with [OK].
Changing the level of the deadband
1. Select "Deadband:" with the [Up] and [Down] buttons. Confirm
with [OK].
2. Change the value for the level of the deadband with the [Up],
[Down], [Left] and [Right] buttons. Confirm with [OK].
9.5.3 Settings ... 2-P
"Kp [%]:" The proportional part of the PID controller with a
range of 0 to 100 %
"Ti [s]:" The integral part of the PID controller with a range
of 1 to 3000 seconds.
"Td [s]:" The derivative part of the PID controller with a
range of 0 to 1000 seconds.
"Disturb.:" Defines the source of the disturbance control.
"D. factor:" The disturbance factor is a multiplicative factor
"Direction:" Direction of the controller:
•"up": The controller increases the controller
output, if the setpoint is above the parameter,
and decreases the controller output, if the
setpoint is below the parameter.
•"down": The controller decreases the controller
output, if the setpoint is above the parameter,
and increases the controller output, if the
setpoint is below the parameter.
"Deadband:" A dead band is defined to avoid repeated
activation-deactivation cycles (Hunting).
TM06 5960 0316
Output: Deadband:
Heating
output
Cooling
output
Target value
PV
0
∨ C2 settings
► Type: 2-P
Hysteresis: 0.05
Disturb.: DI 1
D. factor: 50.0
Direction: up
"Type:" Controller type: "PID" or "2-P"
"Hysteresis:" Hysteresis for the 2-P-controller. The switching
points for the controller are:
Setpoint ± Hysteresis
"Disturb.:" Defines the source of the disturbance control.
"D. factor:" The disturbance factor is a multiplicative factor
"Direction:" Direction of the controller:
•"up": The controller increases the controller
output, if the setpoint is above the parameter,
and decreases the controller output, if the
setpoint is below the parameter.
•"down": The controller decreases the controller
output, if the setpoint is above the parameter,
and increases the controller output, if the
setpoint is below the parameter.