BECKHOFF EtherCAT Technology Section I - Manual (Page 15)

ABBREVIATIONS
Slave Controller – Technology I-XV
EPU EtherCAT Processing Unit. The logic core of an ESC containing e.g. registers,
memory, and processing elements.
Fast Ethernet Ethernet with a transmission speed of 100 Mbit/s.
FCC Federal Communications Commission
FCS Frame Check Sequence
FIFO First In First Out
Firewall Routers or other network component that acts as a gateway to the Internet and
enables protection from unauthorized access.
FMMU Fieldbus Memory Management Unit
FoE File access over EtherCAT
Follow Up Message that follows Sync and indicates when the Sync frame was sent from
the last node (defined in IEEE 1588).
FPGA Field Programmable Gate Array
FPRD Configured Address Physical Read
FPWR Configured Address Physical Write
FPRW Configured Address Physical ReadWrite
FRMW Configured Address Physical Read Multiple Write
Frame See PDU
FTP File Transfer Protocol
Get Access method used by a client to read data from a device.
GND Ground
GPI General Purpose Input
GPO General Purpose Output
HW Hardware
I²C Inter-Integrated Circuit, serial bus used for SII EEPROM connection
ICMP Internet Control Message Protocol: Mechanisms for signaling IP errors.
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
INIT INIT state of EtherCAT state machine
Interval Time span
IP Internet Protocol: Ensures transfer of data on the Internet from end node to end
node.
Intellectual Property
IRQ Interrupt Request
ISO International Standard Organization