Accelnet Plus Micro Modules User Guide
16-01687 Rev 03
Copley Controls
Page 20 of 139
E
THER
CAT
I
NTERFACE
:
AEV
MODELS
The Accelnet Plus Micro Modules accept
CAN application protocol over EtherCAT
(CoE)
commands. EtherCAT supports two types of addressing nodes on the network: auto-
increment and fixed. Nodes on an EtherCAT network are automatically addressed by their
physical position on the network. The first drive found on the network is auto-increment
address -1 (0xFFFF). The second is -2 (0xFFFE), and so on. Fixed addresses are assigned
by the master when it scans the network to identify all of the nodes and are independent
of the physical position on the network. Fixed addresses begin with 1001 (0x3E9) and
increment thereafter as nodes are found.
As an alternate to the default addressing, switches S1 and S2 may be used to program a
drive’s Device ID, or
Station Alias with a value between 0x01 and 0xFF (1-255 decimal).
In dual axis drives the second drive follows the first’s Device ID value. Use of a station
alias guarantees that a given drive can be accessed independently of the cabling
configuration.
The fixed address and station alias are always available. If the switch-based station alias is used, it is the responsibility of the
user to ensure that each drive has a unique station alias.
