Fb Function
WE
Anl
Comments
Function block parameters
/ Range of values (default setting)
06 Reverse control
ON
Not
1, 3, 6
Co4 -> Fb06 = ON: Reverse control
Co4 -> Fb06 = OFF: Set-back operation
Function block parameters:
Activate priority in case of deviation / 0 to 30 °C (0 °C)
07 Time until reverse
control
ON
Not
1, 2,
3, 6
Co4 -> Fb07 = ON: Reverse control after 2 minutes
Co4 -> Fb07 = OFF: Reverse control after 10 minutes
08 Thermal
disinfection
OFF
Not
1, 3, 6
Co4 -> Fb08 = ON:
Function block parameters:
Day of the week /0 = daily, 1 = Monday, 2, …, 7 (3 =
Wednesday)
Disinfection temperature / 60 to 90 °C (70 °C)
Charging boost / 0 to 30 °C (5 °C)
Start time / 00:00 to 23:30 h (00:00 h)
Stop time / 00:00 to 23:30 h (04:00 h)
09 Three-point step-
ping control
for DHW heating
ON
Not
1, 2,
3, 6
Co4 -> Fb09 = ON:
Function block parameters:
K
P
(proportional gain) / 0.1 to 50.0 (0.5)
T
N
(reset time) / 1 to 999 s (200 s)
T
Y
(valve transit time) / 15 to 240 s (120 s)
10 Storage tank
system
OFF
Not
1, 3, 6
Co4 -> Fb10 = ON: DHW heating in storage tank system
11 Mixing valve
always active
OFF
Not
1, 3, 6
Co4 -> Fb11 = ON: Heating maintained to prevent circulation
losses
12 Public holiday and
vacation data
apply to DHW
circuit
OFF
Not
1, 3, 6
Co4 -> Fb12 = ON:
Function block parameter:
Data for heating circuit / 1 to 3 (1)
13 Condensate
accumulation
control
7, 8
Co4 -> Fb13 = ON:
Function block parameter:
Maximum system deviation / 2 to 10 °C (2 °C)
For all other systems (Anl) enter under Co5 -> Fb07
14 Continuous-action
control
DHW heating
OFF
Not
1, 3, 6
Co4 -> Fb14 = ON: Continuous-action control 0 to 10 V
Function block parameters:
K
P
(proportional gain) / 0.1 to 50.0 (0.5)
T
N
(reset time) / 1 to 999 s (200 s)
T
V
(derivative-action time) / 0 to 999 s (0 s)
Fb Function block, WE Default setting
100
EB 5179 EN
Appendix
