ProSoft Technology ControlLogix inRAx MVI56E-MNETR User Manual page 62

Configuring the MVI56E-MNETR Module
User Manual
Reg Count
Regs: 1 to 125
Coils: 1 to 800
This parameter specifies the number of 16-bit registers or binary bits to be
transferred by the command.
Functions 5 and 6 ignore this field as they apply only to a single data point.
For functions 1, 2, and 15, this parameter sets the number of bits (inputs or
coils) to be transferred by the command.
For functions 3, 4, and 16, this parameter sets the number of registers to be
transferred by the command.
Swap Code
N
ONE
S W
WAP ORDS
S W
WAP ORDS
S B
WAP YTES
This parameter defines if and how the order of bytes in data received or sent is to
be rearranged. This option exists to allow for the fact that different manufacturers
store and transmit multi-byte data in different combinations. This parameter is
helpful when dealing with floating-point or other multi-byte values, as there is no
one standard method of storing these data types. The parameter can be set to
rearrange the byte order of data received or sent into an order more useful or
convenient for other applications. The following table defines the valid Swap
Code values and the effect they have on the byte-order of the data.
Swap Code
N
ONE
S W
WAP ORDS
S W & B
WAP ORDS
S B
WAP YTES
These swap operations affect 4-byte (or 2-word) groups of data. Therefore, data
swapping using these Swap Codes should be done only when using an even
number of words, such as when 32-bit integer or floating-point data is involved.
Node IP Address
xxx.xxx.xxx.xxx
The IP address of the device being addressed by the command.
Page 62 of 175
& B
YTES
Description
No change is made in the byte ordering (1234 = 1234)
The words are swapped (1234=3412)
The words are swapped, then the bytes in each word are swapped
YTES
(1234=4321)
The bytes in each word are swapped (1234=2143)
MVI56E-MNETR ♦ ControlLogix Platform
Modbus TCP/IP Interface Module with Reduced Data Block
ProSoft Technology, Inc.
June 14, 2011