Using Controller Tags MVI69E-MBTCP ♦ CompactLogix Platform
User Manual Modbus TCP/IP Enhanced Communication Module
Page 78 of 150 ProSoft Technology, Inc.
June 28, 2017
For example, if you expand MBTCP.DATA, you see that it contains two UDTs,
ReadData and WriteData. Both of these are 600-element integer arrays by
default.
Notice that these UDTs are the data types used to declare the
MBTCP.DATA.ReadData and MBTCP.DATA.WriteData controller tag arrays.
The UDTs are commented in the DESCRIPTION column.
Tip: If more than 600 words of Read or Write Data are needed, the MBTCP.DATA.ReadData and
MBTCP.DATA.WriteData controller tag arrays can be expanded. Simply edit the size of the
ReadData or WriteData integer array in the Data Type column of the MBTCPDATA UDT. In the
example below, the ReadData array size has been changed to 2000. Save and download the
ladder program for this change to take effect.
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