GE RX3i - Page 185

Chapter 9. Modbus/TCP Client
172 PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual GFK-2224Q
PACSystems Modbus Client Endian Conversion Example
The following example table shows the Endian conversion behavior for the PACSystems Modbus Client:
Memory
Location /
Type
Memory value
example
Transfer
Direction
Memory
Location /
Type
Resulting Value After
Transfer Notes
Client Bit
%M16-%M1 =
0x4321

Server Word %R1 = 0x4321
End-to-end bytes
un-swapped
Server Bit
%M16-%M1 =
0x4321

Client Word %R1 = 0x4321
End-to-end bytes
un-swapped
Client Word %R1 = 0x4321

Server Bit %M16-%M1 = 0x4321
End-to-end bytes
un-swapped
Server
Word
%R1 = 0x4321

Client Bit %M16-%M1 = 0x4321
End-to-end bytes
un-swapped