UDP/IP-based class 1 connected messaging for EtherNet/IP. Implicit messaging maintains an open connection for the scheduled transfer of control data between a producer and consumer. Because an open connection is maintained, each message contains data primarily, without the overhead of object information, plus a connection identifier.
device DDT (DDDT)
(Device derived data type) Predefined by the manufacturer and not editable. It contains the I/O language elements of an I/O module.
