Technical information

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Functions
Functions
Ethernet universal services
The universal Ethernet services used are as follows:
HTTP (HyperText Transfer Protocol):
This protocol is used for transmitting Web pages between a server and a browser.
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.
BOOTP/DHCP
(RFC1531):
These protocols are 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.
The DHCP protocol (Dynamic Host Configuration Protocol) is used to assign
configuration parameters to devices automatically. DHCP is an extension of BOOTP.
Schneider Electric devices can be “BOOTP clients” (used to retrieve the IPBOOTP clients” (used to retrieve the IP
address automatically from a server) or “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):
This protocol provides the basic elements for file sharing. Many systems use it to
exchange files between devices.
TFTP (File Transfer Protocol) (RFCs 959, 2228, and 2640):
This network transfer protocol can be 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.
Transparent Ready devices implement FTP and TFTP for transferring certain
information to or from devices, in particular for downloads of firmware or user-defined
Web pages.
SNMP (Simple Network Management Protocol) (RFCs 1155, 1156 and 1157):
The SNMP standard manages the various network components 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.
Transparent Ready devices are SNMP-compatible and can be integrated naturally
in a network managed via SNMP.
COM/DCOM (Distributed Component Object Model) (RFCs 1155, 1156 and 1157):
COM/DCOM or OLE (Object Linking and Embedding) protocol is the name of the
technology consisting of Windows objects which enables transparent
communication between Windows applications.
These technologies are used in the OFS (OLE for Process Control Factory Server)
data server software.
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Modbus standard communication protocol
Modbus protocol, the industry communication standard since 1979, has been combined
with Ethernet Modbus/TCP, the medium for the Internet revolution, to form Modbus/TCP,
a completely open Ethernet protocol.
The development of a connection to Modbus/TCP does not require any proprietary
component, nor purchase of a license.
This protocol can easily be combined with any product supporting a standard TCP
communication stack. The specifications can be obtained free of charge from the
following website:
www.modbus-ida.org
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Modicon M340 automation
platform
Ethernet Modbus/TCP network
Ethernet Modbus/TCP communication services
Processors:
page 1/2
I/O:
pages 2/2 and 2/14
Software:
page 4/2
Ruggedized Modicon M340 modules:
page 6/2
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