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EN_User_documentation_Instructions_for_controlling_the_Logamatic_5000_controller_series_via_Modbus_TCP_I
P_20210203.docx | 10.02.2021
Note:
With the values from the above example, a temperature-controlled heat re-
quest with X °C, which is to work as a lead boiler, is sent to a boiler. For a
system with FM-CM, the guide boiler function must be enabled.
X in °C corresponds to your desired flow temperature.
2.6.2
Power-controlled heat request via Modbus TCP/IP from and in-
cluding version 1.3.X
To be able to send a power request via Modbus, you must first configure the control-
ler accordingly (see chapter "Information on parameters 'Heat request via Modbus'
and 'Internal heat request'").
Then you can write to the following Modbus registers:
Register
Value of Register
Operation Mode
(Holding Register 402)
1
Flow Temperature Set point
(Holding Register 400)
X in %
Leading Boiler
(Holding Register 405; Bit
0
)
1
Temperature controlled operation
(Holding Register 405; Bit
2
)
0
Power controlled operation
(Holding Register 405; Bit
3
)
1
Note:
With the values from the above example, a power-controlled heat request
with X %, which is to work as a lead boiler, is sent to a boiler. In the case of a
system with FM-CM, it is mandatory to enable the guide boiler function.
You can only use the output-guided control if you have deactivated the inter-
nal heat request.
X in % corresponds to your desired output..
2.6.3
Information on 'Heat request via Modbus' and 'Internal heat re-
quest' parameters
You can use the following parameters of the controller to define how a heat or power
request can be generated at the controller. The parameters for configuring the be-
havior can be found in the Service menu > Heat generation > Strategy data > Basic
settings. Depending on the parameterization, this may have an effect on the control.
