ProSoft Technology MVI56E-MNETCR - Manual (Page 42)

Start Here MVI56E-MNETCR ♦ ControlLogix Platform
User Manual Modbus TCP/IP Multi Client Enhanced Communications Module for Remote Chassis
Page 42 of 159 ProSoft Technology, Inc.
June 14, 2011
Adjusting the Input and Output Array Sizes (Optional)
The module internal database is divided into two user-configurable areas:
Read Data
Write Data
The Read Data area is moved from the module to the processor, while the Write
Data area is moved from the processor to the module.
The MVI56E-MNETCR Add-On Instruction rung is configured for 600 registers of
Read Data and 600 registers of Write Data,
which is sufficient for most
applications. However, you can configure the sizes of these data areas to meet
the needs of your application.
1 In ProSoft Configuration Builder, expand the Module icon in the tree view and
double-click M ODULE to open an Edit window. Change the R EAD R EGISTER
C OUNT to contain the number of words for your Read Data area.
Important: Because the module pages data in blocks of 200 registers at a time, you must
configure your user data in multiples of 200 registers.
2 To modify the WriteData array, follow the above steps, substituting WriteData
for ReadData. Also, make sure that the ReadData and WriteData arrays do
not overlap in the module memory. For example, if your application requires
2000 words of WriteData starting at register 0, then your Read Register Start
parameter must be set to a value of 2000 or greater in ProSoft Configuration
Builder.
3 Save and download the sample configuration to the module.
It is unnecessary to manually edit the ReadData and WriteData user-defined data
types in the ladder logic, as these are automatically updated to match the
changed array sizes in ProSoft Configuration Builder.