EJ2502 - setting of the process data objects (PDO)

The process data to be transmitted (PDO, ProcessDataObjects) can be selected by the user

• for all channels simultaneously via the "Predefined PDO Assignment" selection dialog; see fig. (E) below.
  The EJ2502 offers a choice of three different "Predefined PDO Assignments":
• "Pulse width (standard)": 0x1600 and 0x1601 (marked in blue in the illustration below)
• "Pulse width and frequency (16 bit)": 0x1602 and 0x1603 (marked in red in the illustration below)
• "Pulse width and frequency 1 Hz (32-bit)": 0x1604 and 0x1605 (marked in green in the illustration below)
• These can be selected for individual channels and PDOs by selecting the Sync Manager (see illustration A below) and then selecting the PDOs (see illustration B below).
  Exclusion criteria prevent irregular combinations. Excluded PDOs have a grey background. Therefore, for example, the PDO 0x1600 cannot be selected as long as 0x1604 is activated.

These changes become effective after activation and an EtherCAT restart or a reload.

The assignment of the PDOs to the respective Sync Manager is displayed in the "SM" column in the "PDO List" (see fig. C below). The contents of the PDO selected in the "PDO List" are displayed in the "PDO Content" field (see fig. D below). An overview of the assignment and contents of the PDOs can be found in the chapter "EJ2502 - Assignment and contents of the PDOs".
The selected PDOs are displayed in the TwinCAT tree (F) and can be linked.
A detailed description of the selection of the PDO can be found in the EtherCAT System-Documentation in chapter "EtherCAT subscriber configuration".

EJ2502 - Assignment and contents of the PDOs