176461 User Manual.book

Communications Instruction

Example 2 - Passthru via DH485 Channel 0 of the SLC 5/04

Processor

TERM

COM

SHLD

CHS GND

TX TX

TX PWR

DC SOURCE

CABLE

EXTERNAL

TERM

COM

SHLD

CHS GND

TX TX

TX PWR

DC SOURCE

CABLE

EXTERNAL

25-37

MicroLogix 1500 Programmable Controllers User Manual

MicroLogix 1500 Processor (Device D) to SLC 5/04 Processor (Device A) via an SLC 5/04 Processor (Device C)

(Passthru using Channel 0 DH485)

25-38

Channel is set to 0 since the originating command is initiated by a MicroLogix 1500 processor on the DH485 network.

Local Bridge Node Address is set to 1 since this is the DH485 node address used by the passthru SLC 5/04 processor.

Remote Bridge Node Address is set to 0 (not used) because communication is from one remote-capable device to another remote-capable device.

Remote Station Address is the SLC 5/04 processor at node address 1.

Remote Bridge Link ID is the link ID of the remote DH+ network with both

SLC 5/04 processors (Channel 1, Link ID 2).

Note:

Important:

Data Table Addresses, the Size in Elements and Message Timeout are all user-specified.

Set the MicroLogix 1500’s Link ID in the channel configuration screen.

Communications Instruction

MicroLogix 1500 Processor (Device D) to PLC–5 (Device B) via an SLC 5/04

Processor

(Passthru using Channel 0 DH485)

Channel is set to 0 since the originating command is initiated by an MicroLogix 1500 processor on the DH485 network.

Local Bridge Node Address is set to 1 since this is the DH485 node address used by the passthru SLC 5/04 processor.

Remote Bridge Node Address is set to 0 (not used) because communication is from one Internet–capable device to another remote-capable device.

Remote Station Address is the PLC-5 processor at node address 3.

Remote Bridge Link ID is the link ID of the remote DH+ network with the SLC 5/04 processor (Channel 1, Link ID 2) and PLC-5 processor (Channel 1A, Link ID 2).

Note:

Important:

Data Table Addresses, the Size in Elements and Message Timeout are all user-specified.

Set the MicroLogix 1500’s Link ID in the channel configuration screen.

25-39