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Appendix| EtherCAT
optoNCDT 2300
The local assignment of physical slave memory addresses and logical segment-wide addresses is implemented via the field bus
Memory Management Units (FMMUs). The configuration of the slave FMMUs is implemented by the master. The FMMU configuration
contains a start address of the physical memory in the slave, a logical start address in the global address space, length and type of
the data, as well as the direction (input or output) of the process data.
A 7.2.4 Sync Manager
Sync Managers serve the data consistency during the data exchange between EtherCAT® master and slaves. Each Sync Manager
channel defines an area of the application memory. The optoNCDT2300 has four channels:
- Sync-Manager-Kanal 0: Sync Manager 0 is used for mailbox write transfers (mailbox from master to slave).
- Sync-Manager-Kanal 1: Sync Manager 1 is used for mailbox read transfers (mailbox from slave to master).
- Sync-Manager-Kanal 2: Sync Manager 2 is usually used for process output data. Not used in the sensor.
- Sync-Manager-Kanal 3: Sync Manager 3 is used for process input data. It contains the Tx PDOs that are specified by the PDO as-
signment object 0x1C13 (hex.).
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