7-8Connecting 1769-L20 CompactLogix Controllers on Ethernet

The 5 rungs used to configure ENI #2 are defined as follows:

Table 7.3 ENI #2 Configuration - Rung Descriptions

Rung

Function

 

 

Rung 2

This rung initiates the process and configures the ENI module’s Serial port for

 

38400 Baud.

 

 

Rung 3

This rung is initiated by the Done bit of the previous MSG and it disables

 

BOOTP.

 

 

Rung 4

This rung configures the ENI with its own IP address.

 

 

Rung 5

This rung adds the IP address of the SLC 5/05 controller to the ENI module’s

 

Message Routing table at DF1 node 1. This means that any message sent by

 

the -L20 controller with a DF1 destination address of 1, will be sent to the SLC

 

5/05 controller on Ethernet.

 

 

Rung 6

This rung adds the IP address of the 1756-ENET module to the ENI module’s

 

Message Routing table at DF1 node 45. This means that any message sent by

 

the -L20 controller with a DF1 destination address of 45, will be sent to the

 

5550 controller in slot 0, via the 1756-ENET module on Ethernet.

 

 

Rung 7

This rung instructs the ENI module to save the configuration data sent to it in

 

non-volatile memory.

 

 

The following table contains the information needed to send messages to the ENI to configure it for this example. For a complete list of ENI configurable features, please refer to Chapters 4 and 5.

Table 7.4 ENI #2 Configuration - Message Instructions Parameters

Configuration

Configuration Function

Data Type

Message Node

Message

Message Function

Node Number

 

 

Number

Length (bytes)

 

 

 

 

 

 

 

 

101

Configure Route 1 Address

Integers

1

8

Route DF1 MSG to IP at Address 1

 

 

 

 

 

 

145

Configure Route 45 Address

Integers

45

8

Route DF1 MSG to IP at Address 2

 

 

 

 

 

 

 

248

Save/Reset

Integer

N/A

2

0

= save configuration to flash

 

 

 

 

 

 

250

TCP/IP Config.

Integer

N/A

8

Assign an IP Address to the ENI

 

 

 

 

 

 

 

252

BOOTP

Integer

N/A

2

1

= disable BOOTP

 

 

 

 

 

 

 

253

Baud Rate

Integer

N/A

2

6

= 38400 Baud

 

 

 

 

 

 

 

Publication 1761-UM006A-EN-P - February 2001

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HP MicroLogix 1761-NET-ENI manual ENI #2 Configuration Rung Descriptions Function, Message Message Function