HP MicroLogix 1761-NET-ENI manual Message Routing ENI receives read or, Node Node100, Node Node101

5-2Peer-to-Peer Messaging

The table below illustrates the relationship between messages and their corresponding configuration addresses.

Table 5.1 Message Routing

ENI receives read or	ENI TCP/IP route	Message forwarded to destination
write PCCC message to	configuration	node TCP/IP address
Node 0	Node100	111.222.233.200 (stored at Node 100)
Node 1	Node101	111.222.233.201 (stored at Node 101)

IMPORTANT

When the ENI receives a PCCC write message to a configuration node address (100 through 149), it closes any open communications currently active on that connection and reconfigures the IP address to match the new configuration.

If the received data matches the current configuration, the ENI closes any open communications with the destination device.

If the ENI receives a PCCC read message to any of its configuration addresses (nodes 100 to 149), the ENI responds with the current configuration of that node/address.

Using the configuration shown in Table 5-2;if the controller initiates a read or write message to node 0, the ENI forwards the request to the TCP/IP address at Node 100 (111.222.233.200).

Publication 1761-UM006A-EN-P - February 2001