Heating Control - Control Value Type - ABB IP Touch 7 Manual

2.21.7 Heating control — Control value type
Options:
The actuation of the control valve is determined by the selection of the controller type.
– 2-Point 1 Bit, Off/On: The 2-point control is the simplest type of control. The controller
switches on when the room temperature drops below a certain level (setpoint temperature
value minus hysteresis) and switches off when a particular value (setpoint temperature
value plus hysteresis) is exceeded. The switch-on and switch-off commands are transmitted
as 1-bit commands.
– 2-Point 1 Byte, 0/100%: This is another two-point control as described above. In this case,
however, the switch-on and switch-off commands are transmitted as 1-byte values (0% /
100%).
– PI continuous, 0-100%: The PI controller adjusts its output value between 0% and 100% to
match the difference between the actual value and the setpoint value and enables a precise
regulation of the room temperature to the setpoint value. It sends the control value to the
bus as a 1-byte value (0% - 100%). To reduce the bus load, the control value is only
transmitted if it has changed by a predefined percentage in relation to the previous sent
value. The control value can also be transmitted cyclically.
– PI PWM, On/Off: This also is a PI controller. Here, the output is a 1-bit command. For this to
occur, the calculated control value is converted into a pulse-interval signal.
– Fan coil: The fan coil controller operates like the PI continuous controller. In addition, it
allows the separate activation of the fan in the fan coil unit (e.g. fan speed levels 1 - 3).
Note
Only available when the "Device function" parameter is set either on "Single
device" or "Master device". In case of controller functions with an additional
stage, this parameter is displayed twice.
Note
The following controller parameters are only available when parameter
"Controller function" is set on "Heating" and parameter "Control value type" on
"2-point 1 bit, On/Off" or "2-point 1 byte, 0/100%".
Product manual 2CKA001473B5023
Control elements and application parameter
2-point 1 bit, Off/On
2-point 1 byte, (0/100%)
PI continuous, 0-100%
PI PWM, On/Off
Fan coil
Application "Internal RTC"
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