Installation guide

Estimating Network Performance

890 USE 100 00

3.3 How Devices Interact on the Network

Multiple data transfer and programming operations can occur

concurrently on anetwork. As an example, consider the network in

Figure 27. This example shows five nodes on a single network. In

practice, the network could contain up to its full complement of 64

nodes, and additional networks could be connected through Bridge Plus

devices.

MODBUS PLUS NETWORK

COMPUTER

P230

PROGRAMMING

CONTROLLER

PANEL

CONTROLLERCONTROLLER COMPUTER

P230

PROGRAMMING

PANEL

NODE

A B

Figure 27 Concurrent Multiple Operations

Control processes can be in progress between various nodes while plant

personnel are actively programming, archiving, and diagnosing the

devices from different locations.

Examples of operations which can be occurring concurrently on this

network include:

V Data transfers in progress between controllers 2 and 4

V Computer A operating as a user interface obtaining data from

controllers 2 and 4