Ethernet - ASTECH VLM500-DG User Manual

Data transmission

2.2 Ethernet

The VLM500-DG system can be equipped with an Ethernet interface. The IFFE interface card connects the DG
master to an Ethernet network. This enables communication between evaluation units like a PLC and the
measuring device over large distances using standardized network components.
By using Telnet, the Ethernet interface can be used like the programming interface of the device when the
connection is active. The same command syntax is used for parameterization. The current measured values can be
output permanently and trigger-synchronously.
In addition, the IFFE offers a UDP channel for the transmission of measurement data to a freely selectable
destination address in the network. A TCP channel is also available, which can be reached from anywhere in the
network. This type of transmission is particularly suitable for recording the measured values of the VLM500.
A very helpful function when setting up and monitoring the VLM500-DG with Ethernet interface is the search for
the measuring devices available in the network via a specified UDP broadcast.
By default, the device has the IP address: 192.168.000.051 and the subnet mask: 255.255.255.000. If this address
is not available, a P2P connection must be established in order to change the address via the Telnet client.
Communication

General settings of the serial interface SO2 in the DG-master

Serial interface SO2 of the VLM must be set to defined parameters

Speed setting:

To guarantee an ongoing data output: SO2ON 1

The output interval is synchronous with the refresh length: SO2SYNC 1

The output format is: SO2FORMAT G and SYNCOUTPUT 6

UDP

One UDP channel for the output of the current measured values

Freely selectable configuration of destination IP address and port number

A separate UDP channel for searching for devices in the network via broadcast telegram

Listen-Port of VLM500 = 33003

Identification for ASTECH-devices = 0x05

Response data: type, version, serial number, IP-address, MAC-address, connection status

TELNET

Service related 8-bit ASCII communication via TCP/IP

Client is establishing the connection

Listen-Port = 23

Command syntax the same as with the programming interface

Use of conventional Telnet client programs is possible (e.g. ASTECH Ethertool or third-party
application like Hterm)

Only one connection possible at the same time

Password protected access by default

Standard password: „wega", can be changed via TELNET

Configuration mode for the parameter of the IFFE interface
ASTECH GmbH
SO2Interface 57600 N D
VLM500-DG User manual
page 15