ifm
Supplementary device manual DeviceNet interface in the AS-i ControllerE (AC1318, AC1324), Target from 15
2012-02-29
Glossary of Terms
234
L
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 controller enters the slaves
detected as present for this AS-i master.
LED
LED =
L
ight
E
mitting
D
iode
Light emitting diode, also called luminescent
diode, an electronic element of high coloured
luminosity at small volume with negligible
power loss.
LFS
L
ist of
F
ailed
S
laves = list of slaves with
configuration errors
In this slave list the controller enters the slaves
with a projection error on this AS-i master.
Link
A link is a cross-reference to another part in
the document or to an external document.
LKCS
LKCS =
L
ist of
K
nown
C
TT
S
laves
In this list the CTT slaves (profile 7.4 and 7.5)
which are indicated in the LDS and whose CTT
configuration has already been read are
entered. This list is independent of the LDS,
LPS, LAS and LNACS.
LNACS
LNACS =
L
ist of
N
ot
A
ctivated
C
TT
S
laves
In this list, the CTT slaves (profiles 7.4 and
7.5) which have been detected as CTT slaves
but not activated are entered. As soon as the
slave is entered in the LAS, it is deleted from
this list. These slaves only take part in the data
exchange until the CTT configuration has been
read.
LPS
L
ist of
P
rojected
S
laves
In this slave list the controller enters the slaves
projected for this AS-i master.
LSB
L
east
S
ignificant
B
it/Byte
M
MAC-ID
MAC =
M
anufacturer‘s
A
ddress
C
ode
= manufacturer's serial number
ID =
Id
entifier
Every network card has a MAC address, a
clearly defined worldwide unique numerical
code, more or less a kind of serial number.
Such a MAC address is a sequence of
6 hexadecimal numbers, e.g. "00-0C-6E-D0-
02-3F".
Master
Handles the complete organisation on the bus.
The master decides on the bus access time
and polls the
slaves cyclically.
Master-slave communication
AS-i strictly operates to the master-slave
principle. The master polls all slaves one after
the other in always the same order. Only one
master per network line is allowed (
cyclical
polling).
MBd
MegaBaud
Baud, abbrev.: Bd = unit for the data
transmission speed. Do not confuse baud with
"bits per second" (bps, bits/s). Baud indicates
the number of changes of state (steps, cycles)
per second over a transmission length. But it is
not defined how many bits per step are
transmitted. The name baud can be traced
back to the French inventor J. M. Baudot
whose code was used for telex machines.
1 MBd = 1024 x 1024 Bd = 1 048 576 Bd
