Implicit Process Data Exchange

Overview

Use implicit messaging to create a communication link between the BMECXM module and the .

Description

The BMECXM module supports implicit exchange with:

The CPU through the EtherNet/IP protocol
The CANopen slaves through PDOs

Implicit EtherNet/IP messages are automatically exchanged at each cycle of the associated with the module.

Implicit messages concern the status of the slave and BMECXM modules, and the slave process data. Those implicit messages are to the .

CPU

(central processing unit) Brain of an industrial manufacturing process, also known as the processor or controller. It automates a process as opposed to relay control systems. CPUs are computers suited to survive the harsh conditions of the industrial environment.

EtherNet/IP™

A network communication protocol for industrial automation applications. It combines the standard Internet transmission protocols of TCP/IP and UDP with the application layer common industrial protocol (CIP) to support both high-speed data exchange and industrial control. EtherNet/IP employs electronic data sheets (EDS) to classify each network device and its functionality.

PDO

(process data object) An unconfirmed broadcast message sent from a producer device to a consumer device in a CAN-based network. The transmit PDO from the producer device has a specific identifier that corresponds to the receive PDO of the consumer devices.

task

A group of sections and subroutines, executed cyclically or periodically for the MAST task and periodically for the FAST task. A task possesses a level of priority and is linked to inputs and outputs of the controller. These I/O are refreshed in relation to the task. A controller can have several tasks.

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.