164 / 413
5/30
Functions
Modicon Premium automation
platform
0
Ethernet Modbus/TCP network
Ethernet Modbus/TCP communication services
Functions
Ethernet universal services
HTTP
HypTocol (RFC 1945)
HTTP
(
HyperText Transfer Protocol)
is used to transmit Web pages between a
server and a browser. HTTP has been used on the Web since 1990.
Web servers embedded in Transparent Ready automation products provide easy
access to products located anywhere in the world from a standard web browser such
as Internet Explorer or Netscape Navigator.
BOOTP/DHCP
(
RFC1531)
BOOTP/DHCP is used to provide devices with IP parameters automatically. This
avoids having to manage each device address individually by transferring this
management to a dedicated IP address server.
DHCP (Dynamic Host Configuration Protocol) is used to assign configuration
parameters to devices automatically. DHCP is an extension of BOOTP. DHCP
consists of two components:
b
One to provide the IP network address
b
One to deliver the specific IP parameters to the device from a DHCP server
Schneider Electric devices can be:
-
BOOTP clients allowing the IP address to be retrieved automatically from a server
-
BOOTP servers allowing the device to distribute IP addresses to the network stations
Schneider Electric uses standard BOOTP/DHCP protocols for its FDR (Faulty Device
Replacement) service.
FTP
File Transfer Protocol (RFCs 959, 2228 and 2640)
File Transfer Protocol (FTP) provides the basic elements for file sharing. Many
systems use FTP to exchange files between devices.
TFTP
Trivial File Transfer Protocol (firmware updates)
Trivial File Transfer Protocol (TFTP) is a network transfer protocol used to connect to
a device and download code to it.
For example, it can be used to transfer a boot code to a workstation without a disk
drive or to connect and download updates of network device firmware.
Note:
Transparent Ready products implement FTP and TFTP for transferring certain information
to or from devices, in particular for downloads of firmware or user-defined Web pages.
NTP
Network Time Protocol (RFC 1305)
NTP (Network Time Protocol) is used to synchronize the time of a client or server
device from a time server. Depending on the network used, it provides the following
time precisions based on UTC:
b
A few milliseconds on a local area network (LAN)
b
A few tens of milliseconds on a wide area network (WAN)
SMTP
Simple Mail Transfer Protocol (RFC 0821)
SMTP (Simple Mail Transfer Protocol) is an e-mail transmission service. It is used to
send e-mail between a sender and a recipient via an SMTP e-mail server.
SNMP
Simple Network Management Protocol (RFCs 1155, 1156 and 1157)
The Internet community has developed the SNMP standard for managing the
various components of a network via a single system. The network management
system can exchange data with SNMP agent devices. This function allows the
manager to display the status of the network and devices, modify their configuration
and feed back alarms in the event of a fault.
Note:
Transparent Ready devices are SNMP-compatible and can be integrated naturally in a
network managed via SNMP.
COM/DCOM
Distributed Component Object Model
COM/DCOM (Distributed Component Object Model) or OLE (Object Linking and
Embedding) is the name of the technology consisting of Windows objects which
enables transparent communication between Windows applications.
Note:
These technologies are used in the OFS (OLE for Process Control Factory Server) data
server software.
2
1
3
4
5
6
7
8
9
10