Configuring With Other Scada Software; Change Max Block Read Length - Digi SkyCloud Z4500 Series User Manual

Modbus TCP Client for Automation Control
Parameter

Configuring with other SCADA software

VT SCADA
SCADA software is a common use for the Modbus TCP Client. Instructions for an example application
created with VT Scada are provided below. More information for creating VT Scada applications is
available at VTScada.com/help.
VT Scada reads several addresses at once through a strategy called coalescing. Coalescing may cause
issues in situations where a 16 bit integer follows either a floating point value or a 32 bit integer. To
solve these issues, several changes must be made to the VT Scada configuration to prevent issues
when reading and writing.

Change max block read length

1. Right-click your application in the VT Scada application viewer menu.
2. Select the edit properties menu. At the bottom right of your screen, click the Advanced Mode
button.
Welcome to Digi SkyCloud
Description
integers. When set to "1" (swap 32 bit read order), the second register is returned
as the first. Some configurations may see incorrect values for 32 bit integers.
Changing this value to "1" may resolve the issue.
Configuring with other SCADA software
138