4.3.2.2. Modbus datapoint definitions

Location:
<WorkspaceDirectory>\DataFiles\xio.Modbus.DatapointDefinitions.dat
The Modbus interface provides the opportunity to read and write Modbus datapoints. The current version of the NETx BMS Core Server 2.0 support the handling of Modbus discrete inputs, coils, holding registers, and input registers. For more information see Section 4.9.3.
The encoding of Modbus datapoint types is vendor-specific. To be able to deal with the different vendor-specific encoding, configuration parameters to set the swapping of Words, Double Words, and Bits are available. These parameters can be defined for each device and for each datapoint. Furthermore, it is possible to specify the endianess that is used within the device (cf. Section 4.3.2.1).
Note that using the correct encoding settings is at utmost importance. If these parameters are incorrect, the corresponding values of the Modbus datapoints are interpreted, stored, and displayed in a wrong way. Furthermore, it has to be considered that these parameters are affecting each other. To choose the correct parameters please refer to the manual and datasheet of the used Modbus devices.
The structure of the Modbus datapoint definition file is as follows:
' Modbus datapoint configuration file
' DeviceName;ModbusType;Address;SubDataType;Size;Description;PollingInterval;Persistent;Historical;Synchronize; Wordswap;DWordswap;Bitswap
ModbusController1;discrete input;12416;bool;1;DI 1;10;F;F;F;F;T;F
ModbusController1;coil;12417;bool;1;DO 1;10;F;F;F;;;;;
ModbusController1;input register;12418;uint16;1;AI 1;10;F;F;F;F;;;;;
ModbusController1;holding register;12419;uint16;1;AO 1;10;F;F;F;F;;;;;
Each line – except comment lines that start with ' – defines a single Modbus datapoint.