Rockwell Automation 1799-D16U16BAGL 16 Input/16 Output Digital and 2 Input/2Output Analog - Manual (Page 14)

14 16 Input/16 Output Digital and 2 Input/2 Output Analog Embedded I/O Boards
Publication 1799-IN011A-EN-P - February 2007
Communicate With Your Board
This board exchanges I/O with the master on the DeviceNet network through a cyclic,
polled, or change-of-state connection.
The 1799-D16U16BAGL board consumes and produces I/O data as follows.
The 1799-D16U16VAGL board consumes and produces I/O data as follows.
Cyclic — the board produces and consume its I/O cyclically at the rate configured by the
master on the DeviceNet network.
Polled — the master initiates communication by sending its polled I/O message to the board.
The board consumes the message, updates any outputs, and produces a response containing
the input data.
Change-of-state — a production occurs when an input changes. A heartbeat production
occurs if no input condition change occurs within the expected packet rate. This heartbeat
production tells the master that the board is ready to communicate. Consumption occurs
when data changes and the master produces new output data to the board.
I/O Connection Type Consumes Produces
Cyclic 6 Bytes 11 Bytes
Polled 6 Bytes 11 Bytes
Change-of-state 6 Bytes 11 Bytes
I/O Connection Type Consumes Produces
Cyclic 6 Bytes 11 Bytes
Polled 6 Bytes 11 Bytes
Change-of-state 6 Bytes 11 Bytes