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Basic Device Manual AS-i ControllerE M4 Target V15
2015-10-30
Terms and abbreviations
Hardware error, exception error
274
MAC ID
MAC =
M
anufacturer's
A
ddress
C
ode
→ID =
Id
entifier
Every network card has an MAC address, a clearly defined worldwide unique
numerical code, more or less a kind of serial number. Such an MAC address is
a sequence of 6 hexadecimal numbers, e.g. "00-0C-6E-D0-02-3F".
Marginalia
Marginal column beside a text used for notes and comments. Because of its
outstanding position well suited for quickly finding certain sections in the text.
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 (
→cyclic polling).
MBd
→Baud
Modbus
The Modbus protocol is a communication protocol based on a
→master/slave
architecture and was generated by Modicon* in 1979 for communication with its
PLCs. In industry, Modbus has become a de facto standard.
Modbus/TCP is based on
→Ethernet-TCP/IP. Modbus/TCP ports the protocol
defined for the serial interface to TCP. The
→IP address clearly identifies each
device in a network. Therefore the slave address was used to identify one of
several log i cal units (unit IDs) in a physical device. To do so, extended IP-
addressing is used.
Example
: 192.168.83.28.1 means unit ID 1 on IP address 192.168.83.28.
*) Modicon passed from AEG to Groupe Schneider in 1994.
Operating system
Basic program in the device, establishes the connection between the hardware
of the device and the user software.
OSSD
OSSD =
O
utput
S
ignal
S
witching
D
evice
here: output signal of an AS-i safety monitor
Password
In the menu item [Password] of the menu [System Setup] the operation can be
restricted or enabled. When delivered, the device is in the user mode. By
entering an invalid password (e.g. 1000) all menu items which can change
settings are disabled.
PELV
PELV =
P
rotective
E
xtra
L
ow
V
oltage
Functional extra low voltage with safe separation, grounded variant of SELV.
Extra low voltage with safe separation (grounded variant of SELV). The
specification as PELV system to IEC364-4-41 (initially DIN VDE 0100-410:1997-
01) covers a measure to protect against direct and indirect contact with
dangerous voltages by a "safe separation" between primary and secondary side
in the device (e.g. power supply to PELV specification).
For this reason no separate PE conductor is required in a PELV system. It is
allowed to ground circuits and / or bodies in a PELV system.
Pictograms
Image symbols which convey information by a simplified graphic representation.