ifm
Supplementary device manual Interface CANopen in the AS-i controllerE
Terms, abbreviations
107
Ethernet
Ethernet is a widely used, manufacturer-independent technnology which enables
transmission of data in the network. Ethernet belongs to the family of so-called
"optimum data transmission" on a non exclusive transmission medium. The
concept was developed in 1972 and specified as IEEE 802.3 in 1985.
FE
FE =
F
unctional
E
arth
Functional earth is a reference potential which is not connected to protective
earth or only connected when special measures are taken. The functional earth
serves as equalisation of potential for an ungrounded installation (e.g.
SELV).
Fieldbus
A
bus for industrial applications: mechanically extremely robust and excellent
data protection
Firmware
Basic program in the device, virtually the operating system.
The firmware establishes the connection between the hardware of the device
and the user software.
Gateway
Access, coupler
Gateways enable connection of completely different systems. Gateways are
used when two incompatible network types are to be connected by converting
the protocol of one system to the protocol of the other system.
Here: connection between AS-i and higher-level fieldbus systems such as
Ethernet-DP, CANopen, Interbus-S or other interfaces, e.g. RS-585. The device
includes an AS-i master which is directly coupled to the
host interface (e.g.
Ethernet-DP slave).
GSD
D
evice
M
aster
F
ile
Describes the interface to the device to be connected to the fieldbus. The file is
provided on the
ifm
CD (
folder "Gateway").
Host
The controller in the hierarchy above the AS-i master, e.g. a PLC or a processor.
ID
ID =
Id
entifier
Name to differentiate the devices / participants connected to a system.
IP address
IP =
I
nternet
P
rotocol
The IP address is a number which is necessary to clearly identify an internet
participant. For the sake of clarity the number is written in 4 decimal values, e.g.
127.215.205.156.
Jitter
By jitter is understood a slight fluctuation in accuracy in the transmission cycle
when transmitting digital signals. More generally, jitter in transmission technology
means an abrupt and undesired change of the signal characteristics.
LAS
L
ist of
A
ctive
S
laves
In this slave list the controllerE enters the slaves detected as active for this AS-i
master.
LDS
L
ist of
D
etected
S
laves
In this slave list the controllerE enters the slaves detected as present for this AS-
i master.
LED
LED =
L
ight
E
mitting
D
iode
Light-emitting diode, also luminescent diode, an electronic element with a high,
coloured luminosity in a small area, with a negligible power dissipation.
LFS
L
ist of
F
ailed
S
laves = list of slaves with projection errors
In this slave list the controllerE enters the slaves with a projection error on this
AS-i master.