Device Editor Modbus Data Type Define in a Xenta 5/7/9xx


  • Vista Workstation displays a data point as a signed integer data type that reads from a modbus device, but the modbus point is defined as unsigned integer data type in Device Editor.
  • When a modbus point's raw value is greater than 32768, Vista Workstation displays a negative value.

Product Line

TAC Vista


  • Xenta Servers Ver 5.1.4 or previous
  • Xenta 511, 527, 555, 701, 711, 721, 731, 913
  • Device Editor


Xenta Servers will read Modbus data as 16-bit signed data, whether the modbus point is defined as 16bit SIGNED or 16bit UNSIGNED in the Device Template.


Upgrade Xenta Servers firmware to 5.1.5 or above;

Upgrade Vista software environment to 5.1.5 or above.

include  Vista Server, Xbuilder, Device Template, Menta