TRA-F22x-A
C
ONFIGURATION
Doc: 70-00-0958A V1.0, 20221102
© Vector Controls GmbH, Switzerland
Page 24-34
Subject to change without notice
www.vectorcontrols.com
V
ECTOR
5.8
Control settings
5.8.1
Parameter 4xx overview
Par/
Addr
Description
Data type / value
Default
R/
W
P400
Heating mode
on/off valve: Switching differential (
X
H
)
3-position valve: Proportional band (
X
pH
)
Modulating valve: Proportional band (
X
pH
)
See P203 for valve type
Multiplier: 10
0.1…10.0 °C
2.0 °C
R/
W
P401
Cooling mode
on/off valve: Switching differential (
X
C
)
3-position valve: Proportional band (
X
pC
)
Modulating valve: Proportional band (
X
pC
)
See P203 for valve type
Multiplier: 10
0.1…10.0 °C
1.0 °C
R/
W
P402
Integral time
Note: For floor heating and chilled ceiling the
integral action is 60 times slower
0 = Integral disabled
10 … 1200 sec
Floor heating: 10 … 1200 min
300 sec
Floor h.:
60 min
R/
W
P403
Dead zone half span (in Comfort mode for
cooling and heating application [P200 = 6])
Multiplier: 10
0.1…5.0 °C
1.0 °C
R/
W
5.8.2
Proportional control (proportional band or switching differential)
The proportional control function calculates the output based on the difference between temperature set point and measured
room temperature. The proportional band (P-band) defines the difference between temperature set point and input required
to produce a 100% output. For example: a heating control sequence and a 2.0 °C P-band value will produce a 100% output
when the input temperature is 2.0 °C below temperature set point.
Proportional band (P-band) is the inverted proportional gain. Small P-band values lead to a fast reacting controller
(susceptible for oscillation). Large P-band values lead to a slow reacting controller.
5.8.3
Integral control (integral time)
The integral time is the time required to obtain the same manipulated variable as for the proportional action when using
only an integral action. The shorter the integral time, the stronger the correction is of the integral action.
𝑜𝑢𝑡(𝑡) =
1
𝑋
𝐻/𝐶
(𝑒(𝑡) +
1
𝑇
𝐼
∫ 𝑒(𝜏)𝑑𝜏
𝑡
0
)
𝑜𝑢𝑡(𝑡) = 𝐶𝑜𝑛𝑡𝑟𝑜𝑙 𝑂𝑢𝑡𝑝𝑢𝑡 (ℎ𝑒𝑎𝑡 𝑜𝑟 𝑐𝑜𝑜𝑙)
𝑒(𝑡) = 𝑠𝑒𝑡𝑝𝑜𝑖𝑛𝑡(𝑡) − 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒(𝑡)
𝑋
𝐻/𝐶
= 𝑝𝑟𝑜𝑝𝑜𝑟𝑡𝑖𝑜𝑛𝑎𝑙 𝑏𝑎𝑛𝑑 𝑜𝑟 𝑠𝑤𝑖𝑡𝑐ℎ𝑖𝑛𝑔 𝑑𝑖𝑓𝑓𝑒𝑟𝑒𝑛𝑡𝑖𝑎𝑙 (ℎ𝑒𝑎𝑡 𝑜𝑟 𝑐𝑜𝑜𝑙)
𝑇
𝐼
= 𝑖𝑛𝑡𝑒𝑔𝑟𝑎𝑙 𝑡𝑖𝑚𝑒
The integral time can be set between 10 and 1200 seconds (20 minutes). The default value is 300 seconds (5 minutes).
For room temperature control the integral time should be chosen above 120 seconds (2 minutes), since the temperature
change needs in minimum several minutes to take place after heating or cooling valve was changed.
