Hitachi MICRO-EHV+ - Ethercat Master Specifications

Chapter 2 Specifications
2 – 3
2.3 EtherCAT master specifications
Table 2.4 EtherCAT master specifications
Items
Specifications
Communication protocol
EtherCAT protocol
Supported services
CoE (process data communications and SDO communications)
Synchronization
None (DC is not supported)
Physical layer
100BASE-TX
Modulation
Baseband
Baud rate
100M bits/s (100BASE-TX)
Duplex mode
Full / Auto
Topology
Daisy chain, branch wiring
Transmission media
Category 5 Shielded twisted-pair cable or higher
Transmission distance
Distance between nodes : 100m or less (IEEE802.3)
Maximum number of slaves
255
Maximum process data size
Input 5,736 bytes, Output 5,736 bytes
Maximum data sizes per slave
Input 1,434 bytes, Output 1,434 bytes
Maximum message size
2,048 bytes
Minimum communications cycle
10 ms
Sync jitter between slaves
1 s
Process data communications
PDO mapping using CoE
Fail-soft operation for slave communications errors
Stop operation for slave communications errors
SDO communications
CoE
- Emergency message server (receptions from slaves)
- SDO requests and responses
Configuration
Setting node address using EHV-CODESYS / HX-CODESYS network scan
Display of network configuration information
RAS functions
Slave configuration check when starting network
Reading of error information
Trouble shooting information
Slave information
- Automatic reboot of the slaves
- Scanning slaves supported
Mailbox support
CoE (CANopen/CAN application layer over EtherCAT)
SoE (Servodrive over EtherCAT)
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.