Unsolicited Compound Messages with Timestamps

The Series 90 TCP/IP Communications enabler supports a compound message format for unsolicited data that allows the PLC to send multiple registers in a single unsolicited message.

The enabler uses defined Transmission Areas to determine if a message is a simple or compound unsolicited message. You can configure up to eight of these areas by adding entries to the global parameters file that define the transmission area number (1-8) and starting address in the PLC.

To configure %R500 as a transmission areas, add the project level global parameter:

UNSO_TX_AREA_1 with a value of R500

When using Compound Messages:

You will need to define a point for each sub-packet with the correct domain, offset and length.

GE Fanuc recommends that you not configure points that conflict with addresses in the unsolicited transmission areas.

More information

Transmission area format in a PLC.

Sample compound message.

Timestamp calculation.

Series 90 TCP/IP Triplex unsolicited data support.