Rockwell Automation 1785-KA5P/B DHP COMM. ADAPATER MOD. - Manual (Page 32)

Communicating through the 1785ĆKA5
Communication Adapter Module
Chapter 3
3-4
This section explains:
router mode addressing
how the 1785-KA5 operates as a router
Router Mode Addressing
A DH+ device wishing to send an internet packet to a DH485 device must
set the internet destination address (LINK_ID, STATION) to the:
LINK_ID of the DH485 network
STATION address to the DH485 device
How the 1785ĆKA5 Module Operates as a Router
The 1785-KA5 module operates as a router when attached DH485 stations
fully implement IP protocol (if they do not, it acts as a gateway) DH485
stations that implement IP can initiate commands, as well as send reply
messages.
Important: SLC 5/01, SLC 5/02 and fixed controllers do not support IP.
To communicate with one of these processors, use the 1785-KA5 module
as a gateway.
When the 1785-KA5 module receives an internet packet, it acts as an
intermediate station and passes the packet along in the correct direction.
Unlike the gateway process, no packet conversion is necessary because
stations on both sides of the 1785-KA5 “speak the same language.”
1785ĆKA5 Router
Communication