ENI Configuration (Node 248 to 254)

4-9

 

 

2.Create your message logic using whatever conditional instructions you may need. This example uses bit B3:0/7 to condition the MSG instruction and message file 10, element 16 to manage the message session.

3.Open the message instruction and enter the appropriate variables. The variables are described in Table 4.2.

Table 4.2 Message Instruction Variables for Configuring ENI String Parameters

Variable

Setting

 

 

This Controller Parameters:

 

 

Communication Command

For the ENI configuration, this must be set to:

 

• 485CIF for MicroLogix and SLC

 

• an unprotected write command for CompactLogix and

 

PLC-5

 

 

Data Table Address

In this example we are using string file 25, element 0 (ST25:0)

 

 

Size in Elements

For all ENI parameters that require a string configuration,

 

always set this to 1.

 

 

Channel

The RS-232 communication channel that is connected to the

 

ENI, typically 0 or 1.

 

 

Target Device Parameters:

 

 

Message Timeout

Leave this value at the default.

 

 

Data Table Offset

Always 0.

 

 

Local Node Addr (dec).

This is the destination node address, in this example it is 249.

 

 

Local/Remote

Always Local.

 

 

Publication 1761-UM006A-EN-P - February 2001