Allen-Bradley MicroLogix 1200 Reference Manual page 320

21-20 Communications Instructions
Publication 1762-RM001C-EN-P
Remote Bridge Address
This variable defines the remote node address of the bridge device. In this
example, the remote bridge address is set to zero, because the target
device, SLC 5/04 at node 63 (octal) is a remote-capable device. If the
target device is remote-capable, the remote bridge address is not required.
If the target device is not remote-capable (SLC 500, SLC 5/01, SLC 5/02,
and MicroLogix 1000 Series A, B and C), the remote bridge address is
required.
Remote Station Address
This variable is the final destination address of the message instruction. In
this example, integer file 50 elements 0 to 4 of the SLC 5/04 on Link ID
100 at node 63 (octal) receives data from the MicroLogix 1500 controller at
node 12 on Link ID 1.
Remote Bridge Link ID
This variable is a user-assigned value that defines the remote network as a
number. This number must be used by any device initiating remote
messaging to that network. In the example, any controller on Link ID 1
sending data to a device on Link ID 100 must use the remote bridge link
ID of the passthru device. In this example, the SLC 5/04 on Link ID1,
node 17 is the passthru device.
Passthru Link ID
Set the Passthru Link ID in the General tab on the Channel Configuration
screen. The Link ID value is a user-defined number between 1 and
65,535. All devices that can initiate remote messages and are connected to
the local network must have the same number for this variable.