Application Examples

The following examples demonstrate how the components described in previous sections can be deployed in industrial applications.

Daisy Chain

Daisy chain configurations are used in applications such as product packaging, where single items have multiple symbols. For example, a box with one symbol on the top and symbols on either side requires at least three scanners to ensure that all symbols will be decoded.

The highlighted areas below demonstrate how a daisy chain can be arranged. One scanner is placed above the conveyor line and one scanner is placed on each side of the line. The three scanners essentially function as a single scanner, and data is sent from the primary scanner to the host or PLC.

Multidrop

Multidrop networks are used in applications where it is necessary to decode symbols at multiple locations within an industrial process. Scanners are placed at stations located between manufacturing steps, and data from those scanners is directed to a multidrop concentrator before being sent to a host. An example of this type of application is food packaging, in which part number data is collected and tracked throughout the packaging process.

The highlighted areas below demonstrate how a multidrop network can be arranged.

Ethernet TCP/IP and EtherNet/IP

Ethernet TCP/IP is the standard Ethernet interface used to connect multiple locations in a network, such as computers in an office network. It can also be used to network other communications devices, such as scanners and PLCs on a factory floor.

EtherNet/IP™ is a protocol developed and governed by ODVA (Open DeviceNet Vendors Association). It is based on the Common Industrial Protocol (CIP™). The CIP layer is an additional layer within the standard Ethernet interface (Ethernet TCP/IP). EtherNet/IP is common in control systems and PLCs, especially in the United States.

The highlighted areas below demonstrate how an Ethernet daisy chain can be arranged. Ethernet-enabled scanners can also be set up in standalone configurations, or multiple Ethernet-enabled scanners along a production or packaging line can be connected to Ethernet.

"EtherNet/IP" and "CIP" are trademarks of the Open DeviceNet Vendors Association.