EtherCAT Gateway
Wieland Electric GmbH | BA000970 | 07/2019 [9855]
165
Safe-Operational (Safe-OP)
In the transition from Pre-Op to Safe-Op the EtherCAT coupler checks whether the channels for pro-
cess data communication are correct. Before it acknowledges the state change, the EtherCAT gate-
way copies current output data into the corresponding DP RAM areas of the EtherCAT gateway con-
troller. In the Safe-Op state mailbox and process data communication are possible. Here the output
data are updated cyclically while the input data are set to zero.
Operational (Op)
In the "Op" state the EtherCAT gateway copies the data in the RX-PDO onto its input data set 1. The
output data set 1 is copied by the gateway into the TX-PDO and sent to the EtherCAT master.
Bootstrap optional (Boot)
not implemented
Bus topology and cabling
79479947
EtherCAT uses Ethernet as the transmission medium. Standard CAT5 cable is used. Cable lengths of
up to 100 m between 2 devices are possible.
Only EtherCAT components may be used in an EtherCAT network. To implement topologies devia-
ting from the linear structure corresponding EtherCAT components are required that support this. It
is not possible to use hubs.
An EtherCAT network always consists of a master and any number of EtherCAT slaves (gateways or
couplers). Each EtherCAT slave has an RJ45 socket
IN
and
OUT
. The incoming EtherCAT cable from
the direction of the master should be plugged into the socket labeled
IN
. The RJ45 socket
ECAT-
OUT
is used to connect further EtherCAT devices in the same strand in order to create so-called "da-
isy chains". In the last device the
OUT
socket remains free.
EtherCAT RJ45 bus interface
Note:
The device supports the Auto Crossover function.
Pin
Signal
Setup
1
TX+
2
TX-
3
RX+
4
Term 1
5
Term 1
6
RX-
7
Term 2
8
Term 2
Housing
Screen
Table 122: Ethernet connection data
Pin
Signal
Medium
2 x 2 pair twisted copper cable, CAT5 (100 MBit/s)
Cable length
max. 100 m
Transfer rate
100 MBit/s
11.4
