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7.3 Query the Instantaneous Values via Modbus RTU
(COM1/COM2)
The DLU can provide the instantaneous values including their status (see status overview
table 7
: status word) as Modbus RTU slave via COM1 or COM2 (server).
The instantaneous values are represented as 4-byte floating point values (FLOAT according
to IEEE754) and the measured value status as unsigned 16-bit values (U16). During
transmission, the most significant byte is started ("big endian" format).
A document with the description of the available register addresses is automatically
generated during the configuration with the PC program "ThiesDeviceUtility" (when saving
the configuration). The following figure shows an example of this register description.
Figure 42: Modbus register addresses of the instantaneous values example