Rockwell Automation 1785-KA5P/B DHP COMM. ADAPATER MOD. User Manual

Page 30

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Communicating through the 1785ĆKA5

Communication Adapter Module

Chapter 3

3-2

For example:

In Figure 3.1, the DH+ LINK_IDs for all three 1785-KA5 modules must
be set to 1 (the DH+ LINK_ID.)

Figure 3.1

IP addressing

DH+ (LINK_ID = 1)

DH485 (LINK_ID = 3)

DH485 (LINK_ID = 2)

1785 -KA5

1785 -KA5

19199

1785 -KA5

DH485 (LINK_ID = 4)

5

5

DH+ LINK_ID 1,

station 2

DH485 LINK_ID 2,

station 10

DH485 LINK_ID 3,

station 11

DH+ LINK_ID 1,

station 3

DH+ LINK_ID 1,

station 4

DH485 LINK_ID 4,

station 12

Important: The following LINK_ID addresses are reserved:

This LINK_ID address

Is reserved for the

LINK_ID = 0

local network. When a station does not know its own LINK_ID, it can

specify 0 until it determines the value (from a router, for example)

LINK_ID = FFFFh

internet broadcast address. When using this address, the STATION

fields must also be all ones. The broadcast address is only permitted

in the destination field. The broadcast packet is routed to all internet

addresses

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