Modbus Port X Commands - ProSoft Technology CompactLogix MVI69E-MBS User Manual

MVI69E-MBS ♦ CompactLogix™ Platform
Modbus Serial Enhanced Communication Module

6.2.4 Modbus Port x Commands

This section defines the Modbus master command list specifications for MBS P
and MBS P
ORT
In the ProSoft Configuration Builder tree view, double-click the M
C icon.
OMMANDS
In order to interface the MVI69E-MBS with Modbus slave devices, you must create a
command list. The commands in the list specify the slave device to be addressed, the
function to be performed (read or write), the data area in the device to interface with and
the registers in the internal database to be associated with the device data.
The Master command list supports up to 100 commands. The command list is
processed from top (Command #0) to bottom.
Read commands are executed without condition. You can set write commands to
execute only if the data in the write command changes (Conditional Enable). If the
register data values in the command have not changed since the command was last
issued, the command is not executed. You can use this feature to optimize network
performance.
The MVI69E-MBS Master supports several data read and write commands. When a
command is configured, the type of data (bit, 16-bit integer, 32-bit float, etc), and the
level of Modbus support in the slave equipment needs to be considered.
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2.
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ORT
P
ODBUS ORT X
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