Specifications

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Allen-Bradley ControlLogix Ethernet Driver Help

ControlNet™ Gateway Setup

ControlNet Gateway provides a means of communicating with PLC-5C series PLCs on ControlNet with the Allen-

Bradley ControlLogix® Ethernet Driver.

Requirements

Ethernet/IP Interface Module.

1756-CNB or 1756-CNBR Interface Module.

PLC-5C series PLC on ControlNet network.

Note: ControlNet Gateway models do not support automatic tag database generation.

ControlNet Gateway Device ID

The device ID specifies the device IP address in addition to the ControlNet parameters necessary for making a

connection. Device IDs are specified as the following:

Designator

Type*

Description Formats Range

IP/Host

Name

N/A IP Address or host name. Decimal 0-255

1 Port ID Port to backplane. Decimal 1

Optional

Routing Path

Multiple Link,

port pairs

Specifies a way out of the Ethernet/IP communication

module and must equal 1 (port to the backplane).

Decimal *

CNBSlot Link Address Slot Number of the 1756-CNB/CNBR interface module. Decimal 0-255

CNB Channel Port ID The ControlNet channel to use. Alpha A and

ControlNet

Node ID

Link Address ControlNet node ID of target PLC in decimal format.** Decimal 0-99

*For more information, refer to Connection Path Specification.

**For more information, refer to "Node ID Octal Addressing" below.

Example

123.123.123.123,1,2.A.3

This equates to an Ethernet/IP of 123.123.123.123. The ControlNet card resides in slot 2: use ControlNet

channel A and addressing target ControlNet Node ID 3.

Node ID Octal Addressing

The ControlNet node ID is specified in Octal format in the PLC and requires a conversion to Decimal format for use

in the ControlNet Gateway device ID. The node ID can be located in RSWho within RSLinx. It is displayed in Octal

format.

Example

CN node 10 (octal) in RSWho = CN node 8 (decimal) in ControlNet Gateway device ID.

It is important to verify communications with the proper controller. In the example above, if 10 was entered as

the ControlNet node ID in the ControlNet Gateway device ID, communications takes place with Node 12 (octal

equivalent of 10 decimal), not Node 10 (octal). If Node 12 (octal) does not exist, the CNB module returns DF1 STS

0x02. This means that the link layer could not guarantee delivery of the packet. In short, the ControlNet node

could not be located on the ControlNet network.

Note 1: For more information on supplementing a device ID with a routing path to remote ControlNet node, refer

to Communications Routing.

Note 2: For more information on communications parameters, refer to ENI DF1/DH+/ControlNet Gateway

Communications Parameters.

Ethernet/IP Gateway Setup

Ethernet/IP Gateway provides a means of communicating with MicroLogix, SLC 500, and PLC-5 series PLC on

Ethernet/IP with the Allen-Bradley ControlLogix Ethernet Driver.

Requirements