The following applies: in a system of coupled controllers which are hydraulically supplied by
a primary controller all controllers (primary and secondary controllers) must be adjusted to
the same
Register no. for the “demand registers“. A controller which is configured to receive
a demand in register no. 5 will not process a demand sent to register no. 6.
The primary controller compares the received requested demands and its own requested de-
mands and supplies the system with the required flow temperature – if necessary increased
by the value of the
Set point boost of primary exchanger control parameter.
Note!
Overheating may occur in the heating circuits of the primary controller without control valve.
Primary controller:
Functions
WE
Configuration
Device bus
0
32
CO7 -> F01 - 1
Device bus address
Receive external demand
0
5
CO7 -> F15 - 1
Register no. / 5 to 64
Parameter
WE
Parameter level / Range of values
Set point boost of primary exchanger control
5 °C
PA1 / 0 to 50 °C
Secondary controller:
Functions
WE
Configuration
Device bus
0
CO7 -> F01 - 1; device bus address
Send flow set point RK1
0
CO7 -> F10 - 1*
Send flow set point RK2
0
CO7 -> F11 - 1*
Send flow set point TW
0
CO7 -> F13 - 1*
Send max. flow set point
0
CO7 -> F14 - 1*
5
* Register no. / 5 to 64
Note!
The register number specifies the location where the flow set points are saved in the primary
controller. As a result, the register no. set in the secondary controller for CO7 -> F10 to F14
must be the same as the register no. adjusted under CO7 -> F15 in the primary controller.
EB 5576 EN
81
System-wide functions
