ProSoft Technology PLX8X-MNET-61850 - Manual (Page 49)

PLX8x-MNET-61850 ♦ Communication Gateway ProSoft 61850 Configuration Manager
Modbus TCP/IP to IEC 61850 User Manual
ProSoft Technology, Inc. Page 49 of 228
May 14, 2014
For Generic Modbus devices, the Length field can be edited for both read and
write commands.
Swap
If MB Func is a Write, then this parameter defines if the data to be sent to the
server needs to be ordered differently before it is sent out. If MB Func is a Read,
then this parameter defines if the data received from the server is to be ordered
differently than that received from the server device before being stored in the
gateway’s memory database. This parameter is helpful when dealing with
floating-point or other multi-register values, as there is no standard method of
storage of these data types in Modbus devices. This parameter can be set to
reorder the four bytes of each two-register data group received. This can be in
useful when passing data to other applications. The available options are:
 N
O S WAP (Default): No Change is made in the byte ordering. Order: 1-2-3-4.
 S
WAP W ORD : The words are swapped. Order: 3-4-1-2
 S
WAP W ORD AND B YTE : The words are swapped then the bytes in each word
are swapped. Order: 4-3-2-1
 S
WAP B YTES : The bytes in each word are swapped. The words should be
swapped only when using an even number of words. Order 2-1-4-3