Using the Modbus/TCP Protocol ION 8000 Series User Guide
Page 104 Chapter 7 - Third Party Protocols
Using the Modbus/TCP Protocol
Modbus/TCP is the newest open Modbus protocol variant (formerly called
MBAP). It defines the packet structure and connection port (port 502) for the
industry standard TCP/IP protocol. The structure of Modbus/TCP is very similar
to the Modbus RTU packet except that it has an extra six-byte header and does not
use the cyclic redundancy check (CRC). Modbus/TCP retains the Modbus RTU
limit of 256 bytes to a packet.
Modbus TCP Communications
You can communicate to the meter using Modbus TCP (formerly called MBAP).
Your meter must have the optional Ethernet port. Connect to socket 502.
NOTE
You cannot form an EtherGate connection to the Modbus TCP network.
Ethernet
Connect to socket 502
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