PDO and SDO concepts

PDO The access method of is to read and write a data cache . The communication structure is shown in the figure 1 The producer shown - Consumer relations , There is no direct confirmation after data transmission . Master and slave stations monitor data transmission through other ways . Producers can be either master stations or slave stations .

SDO Access follows the client / Server principles . The client makes service calls to the server . Execute the service from the station and then return the result . Usually a response is needed to end such services .