Ethercat Master Specifications - Hitachi MICRO-EHV+ Applications Manual

2.3

EtherCAT master specifications

Items
Communication protocol
Supported services
Synchronization
Physical layer
Modulation
Baud rate
Duplex mode
Topology
Transmission media
Transmission distance
Maximum number of slaves
Maximum process data size
Maximum data sizes per slave
Maximum message size
Minimum communications cycle
Sync jitter between slaves
Process data communications
SDO communications
Configuration
RAS functions
Slave information
Mailbox support
N o t e

Please note that using various Ethernet based communication (EtherCAT, Modbus-TCP, NVL, Gateway) at the same time will
limit the communication performance.

If connected slave devices are drives (e.g. servo drives), supported modes are profile position/velocity/torque modes only.
Cyclic synchronous position/velocity/torque modes are not supported.
Table 2.4 EtherCAT master specifications
CoE (process data communications and SDO communications)
None (DC is not supported)
100M bits/s (100BASE-TX)
Category 5 Shielded twisted-pair cable or higher
Distance between nodes : 100m or less (IEEE802.3)
Input 5,736 bytes, Output 5,736 bytes
Input 1,434 bytes, Output 1,434 bytes
Fail-soft operation for slave communications errors
Stop operation for slave communications errors
- Emergency message server (receptions from slaves)
- SDO requests and responses
Setting node address using EHV-CODESYS / HX-CODESYS network scan
Display of network configuration information
Slave configuration check when starting network
Reading of error information
Trouble shooting information
- Automatic reboot of the slaves
- Scanning slaves supported
CoE (CANopen/CAN application layer over EtherCAT)
SoE (Servodrive over EtherCAT)
2 – 3
Specifications
EtherCAT protocol
100BASE-TX
Baseband
Full / Auto
Daisy chain, branch wiring
255
2,048 bytes
10 ms
1 s
PDO mapping using CoE
CoE
Chapter 2 Specifications