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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
2.
Activating the controller via Modbus TCP/IP
In the following section you will find an excerpt of the cover sheet of the data point
list of the controller, which is relevant for the setup and use of the Modbus TCP/IP
communication. The complete data point list can be downloaded from the Buderus
website.
The data of the Modbus addresses are listed in decimal format. To convert the ad-
dresses to the Modicon scheme, please refer to the chapter "General information
about the conversion of the Modbus address scheme". When using the data points,
please make sure that you select the correct register types and carry out any neces-
sary conversions of the received values. The conversions are necessary to transfer
decimal places.
The Modbus TCP/IP server of the controller supports the following nine Modbus
function codes and data types:
Function Name
Function Code
Read Coils
01
Read Discrete Inputs
02
Read Multiple Holding Register
03
Read Input Registers
04
Write Single Coil
05
Write Single Holding Register
06
Write Multiple Coils
15
Write Multiple Holding Registers
16
Read/Write Multiple Registers
23
Data Type
Description
Coils
Read- and Writeable, 1 Bit
Discrete Inputs
Readable, 1 Bit
Input Registers
Readable, 16 Bit
Holding Registers
Read- and Writeable, 16 Bit
Note:
Currently the data types Coils and Discrete Inputs are not used by the con-
troller. Therefore the function codes 01, 02, 05 and 15 have no relevance for
the control of the controller.
