SMC Networks LECSN-T Series - 18.1.3 Communication specifications

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18．EtherCAT COMMUNICATION
18.1.3 Communication specifications
The following table shows the communication specifications.
Item
Description
Remark
EtherCAT communication
specifications
IEC 61158 Type121
CAN application protocol over EtherCAT
(CoE), IEC 61800-7 CiA 402 Drive Profile
Physical layer
100BASE-TX (IEEE802.3)
Communication connector
RJ45, 2 ports (IN port, OUT port)
Communication cable
CAT5e, shielded twisted pair (4 pair) straight
cable
Double-shielded type recommended
Network topology
Line, Tree, Star, or a connection topology
where the topologies are used together
Variable communication speed
100 Mbps (Full duplex)
Transmission speed between
stations
Max. 100 m
Number of nodes
Max. 65535
The number of connection nodes for actual use
varies depending on the specifications of the
master upper side used.
SDO (Mailbox) communication
Asynchronous
Sending/Receiving: 1 channel each
Maximum data size in sending/receiving
1486 bytes each
PDO (Process Data)
communication
Cycle time: Select from 0.25 ms, 0.5 ms, 1
ms, and 2 ms.
Receive (RxPDO): 1 channel
Send (TxPDO): 1 channel
Data size at PDO default mapping
RxPDO: 29 bytes
TxPDO: 41 bytes
PDO mapping
Variable PDO mapping supported
Maximum size of RxPDO and TxPDO: 64 bytes
each
Maximum number of object mapping: 32 each
Distributed clock (DC)
The DC mode and Free-run mode can be
selected.
(In drivers , the DC mode is required in the
csp, csv, and cst mode.)
Sync0: Set the same cycle as the PDO
communication cycle.
Sync1: Not used
Explicit Device Identification
Supported
LED display
RUN, ERROR, LINK/Activity (IN, OUT)