Define Points for Unsolicited Data

The Allen­Bradley Ethernet Device Communications Interface can process unsolicited data messages in PLC­2 style format. Unsolicited data can be generated by PLCs, which are directly connected to the Ethernet, such as PLC­5 E series and 5/250 systems. PLCs that are connected to Data Highway or Data Highway Plus networks can indirectly send messages through a bridge such as a 5/250 Resource Manager.

You can configure unsolicited data points via the Device Point Configuration transaction by specifying an address in the following format:

point address>application address


point address is the memory location in the PLC as described in the previous section. This address must be specified in Uppercase.

application address is a unique tag that identifies the unsolicited data item. This is an octal value and must be in the range of 0 – 77777.

Example: N7:10>020

The application address is a logical identifier for CIMPLICITY software, and the data will be mapped to the point address.

More information

Rules for defining unsolicited points.

Control multiple point updates via a logical definition.

Enable PLC­2 protected writes.

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