Prosoft-technology 5201-MNET-ASCII Instrukcja Użytkownika Pobierz pdf (Strona 28)

Modbus TCP/IP Protocol Configuration MNET ♦ ProLinx Gateway

Driver Manual Modbus TCP/IP Interface Module

Page 28 of 78 ProSoft Technology, Inc.

September 1, 2010

2.5.7 Swap Code

NONE

WAP WORDS

WAP WORDS & BYTES

WAP BYTES

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 that do other

manufacturers. 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. This parameter can be set to rearrange the byte order of data received or

sent into 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 Description

None No Change is made in the byte ordering (1234 = 1234)

Swap Words The words are swapped (1234=3412)

Swap Words & Bytes The words are swapped then the bytes in each word are swapped

(1234=4321)

Swap Bytes The bytes in each word are swapped (1234=2143)

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.

2.5.8 Node IP Address

xxx.xxx.xxx.xxx

The IP address of the device being addressed by the command.

2.5.9 Service Port

502 or other supported ports on server

Use a value of 502 when addressing Modbus TCP/IP servers that are compatible

with the Schneider Electric MBAP specifications (this will be most devices). If a

server implementation supports another service port, enter the value here.

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