Bosch Buderus Control 8000 Series - Page 31

User Documentation
31|33
© All rights with Robert Bosch GmbH, also for the case of protected rights applications
EN_User_documentation_Instructions_for_controlling_the_Logamatic_5000_controller_series_via_Modbus_TCP_I
P_20210203.docx | 10.02.2021
Register
type
Address
Data point
Name
Data
Type
Value Range
Meaning
Holding Re-
gister
2
System tempera-
ture Temperature
specification in °C
int
0 to 100
(the maximum
temperature de-
pends on the
System)
Setpoint of the system sup-
ply temperature. This set-
point only applies explicitly
if the "Heat request only via
Modbus" mode is deac-
tivated.
Holding Re-
gister
36
Flow temperature
set point in °C
int
0 to 100
(the maximum
temperature de-
pends on the
type of boiler)
Setpoint of the current
boiler flow temperature.
This setpoint is valid as an
exclusive setpoint if the
"Heat request only via Mod-
bus" mode is enabled.
Holding Re-
gister
37
Set point power
in %
int
0 to 100
Set point of the current
boiler output.
Note:
 It is recommended to perform a firmware update of the controller and to use
the control from version 1.3.X (see chapter "Control of the controller via Mod-
bus TCP/IP").
 If you perform a firmware update on the controller you are already using, you
can still use the subsequent control via Modbus TCP/IP by activating the use
of old Modbus addresses (see chapter "Necessary settings at the control-
ler").
 Data type Integer (int) corresponds to 16 bits (Bit0 to Bit15), see chapter
"Data types and register width".
 The addresses specified here refer to the fact that the controller is configured
as a master. If you use the controller as slave, please refer to chapter "Con-
trol via Modbus TCP/IP in the controller network".Temperaturgeführte Wär-
meanforderung über Modbus TCP/IP bis einschließlich Version 1.2.7.X
To be able to send a heat request via Modbus, you must first configure the controller
accordingly.
Depending on which mode you have selected for the "Heat request only via Mod-
bus" parameter, you must send a different address for the flow temperature setpoint
value.
Note: To make a heat request via Modbus The "System temperature temperature
specification" register is only relevant if the "Heat request only via Modbus" mode is
deactivated. If the "Heat request only via Modbus" mode is activated, the "Setpoint
flow temperature" register must be used for the temperature specification.
Variant "Heat request only via Modbus" deactivated: