Introduction
EtherCAT memory terminal 128 kbyte
The EtherCAT memory terminal has 128 kbyte of non-volatile memory (NOVRAM, non-volatile RAM). The terminal can be used for saving and reading parameters and recipes, and machine data such as operating hours counter or production counts. The terminal is used, for example, for storing module-related data in the machine module in modular machine concepts with a central controller.
Data are only stored in the RAM in the live terminal and would therefore not be stored permanently. If the event of a power failure, an internal buffer supplies the NOVRAM block until the entire contents of the RAM have been stored in a non-volatile memory.
The EL6080 supports 2 methods of accessing the memory: with cyclic process data and via acyclic SDO/CoE access – the access time in both cases is dependent on the amount of data.