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Allen-Bradley ControlLogix Ethernet Driver Help

Node ID Octal Addressing

The DH+ Node ID is specified in Octal format in the PLC and requires a conversion to Decimal format for use in the DH+ Gateway Device ID. The Node ID can be located in RSWho within RSLinx. It is displayed in Octal format.

Example DH+ Node 10 (octal) in RSWho = DH+ Node 8 (decimal) in DH+ Gateway Device ID.

It is important to verify communications with the proper controller. In the example above, if 10 was entered as the DH+ Node ID in the DH+ Gateway Device ID, then communications would take place with Node 12 (octal equivalent of 10 decimal) and not Node 10 (octal). If Node 12 (octal) does not exist, then the DHRIO module would return DF1 STS 0x02. This means that the link layer could not guarantee delivery of the packet. In short, the DH+ Node could not be located on the DH+ network.

Designator IP/Host Name 1

Designator Type* N/A Port ID

Description IP Address or host name. Port to backplane.

Formats Decimal Decimal

Range 0-255 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 back plane).

Decimal

*

CNB Slot

Link Address

Slot Number of the 1756-CNB/CNBR interface module.

Decimal

0-255

CNB Channel

Port ID Link Address

The ControlNet Channel to use.

Alpha Decimal

A and B 0-99

ControlNet Node ID

ControlNet Node ID of target PLC in Decimal Format.**

Note 1: For information on supplementing a Device ID with a routing path to a remote DH+ node, refer to Communications Routing.

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

ControlNet (TM) 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:

<IP or Hostname>,1,[<Optional Routing Path>],<CNB Slot>.<CNB Channel>.<ControlNet Node ID (dec)>

www. kepware.com

Example CN Node 10 (octal) in RSWho = CN Node 8 (decimal) in ControlNet Gateway Device ID.

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

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 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.

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