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).
TM
06 596
0 031
6
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.
