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Vega NB-13 / User Manual
13
Revision 06 of 24 January 2022
packets, and the corresponding response packets from the ModBus device are displayed in the
Configurator's log completely without any transformations.
Function, Address, Read count - supports configuring up to 10 independent read
operations of a ModBus device. For each read operation, you can set the start address of the
read, the function, and the number of registers to be read. If the "None" function is selected,
then the reading of the corresponding address is not performed. If the function 0x01, 0x02
(read bits) is selected, then the "Read count" field sets the number of read bits (from 1 to 64 bits).
If the function 0x03, 0x04 (reading 16-bit registers) is selected, then the "Read count" field sets
the number of registers to be read (from 1 to 4 registers).
Read data - the field contains data read from the ModBus device. The data is displayed
in cells with the name: A, B, C, D, E, F, G, H. Each cell displays a byte in HEX format. If fewer
bytes are read, then unused cells are darkened and "00" is displayed in them.
Format and Value - fields are used for visual display of the read data in the required
format in the Configurator. In the ModBus JSON message sent to the server, the data is
presented in its original form (HEX) without any transformation, in the same sequence as
transmitted in the packet on the RS line. See
The sequence of actions for configuring ModBus:
1. Specify settings on the “Settings” tab of the Configurator.
Specify the "Collect data" operation mode (ModBus works only in this mode). Specify
connection settings and server settings. Specify the RS interface settings in accordance with
the documentation for the connected ModBus device.
2. Enter the settings on the “ModBus Settings” tab of the Configurator.
Enable ModBus, set the "Function", "Address" and "Read count" parameters.
3. Press the button "Apply settings".