Instructions

UM-0085-B09 DT80 Range User Manual Page 231

Email alarm messages will be retried four times then discarded.

By default, FTP/email data unloads will be retried indefinitely; however this can be limited if required using

PROFILE UNLOAD FTP_RETRIES=num

which will delete the unload data file from the queue after num retries.

Note: If a data file from an incremental unload (one which specified start=new) is abandoned, then the time period covered by the

failed unload will be missing from the data set on the FTP server, even if communications with the server subsequently recover. The

data for this time period will then need to be manually recovered, e.g. using the dEX web interface "retrieve data" function.

In dEX, the retry interval (RETRY_DELAY_S) is set on the Ethernet settings page, on the Session tab, while the

FTP_RETRIES setting is on the Advanced page.

Ethernet Communications

All DT80 models are fitted with an Ethernet port for network communications.

Connecting to the DT80 Ethernet Port

The DT80's Ethernet port is designed to connect to any 10-BaseT Ethernet compatible network. This includes 100-

BaseT (fast Ethernet) and 1000-BaseT (gigabit Ethernet) networks. The DT80 Etherent port operates at a maximum data

rate of 10Mbps.

There are two ways to connect to a network:

• directly connect the DT80 to a single host computer using a "cross-over" cable. In this case you are effectively

creating a new mini-network, with just two devices connected – the DT80 and the host computer.

• connect the DT80 to a spare port on an Ethernet hub, bridge or router, using a standard ("straight through)

cable. In this case the DT80 will be joining an existing network.

Note: many recent PC and switch/ router models incorporate "auto switching" Ethernet ports. Such devices may be connected to the

DT80 using either a standard or cross-over Ethernet cable.

Direct Connection to a PC

A direct Ethernet connection provides a link between a single PC and the DT80.

Figure 89: Direct Ethernet connection

In the above example, the PC and the DT80 have both assigned themselves Auto-IP addresses, as there is no DHCP

server available. Auto-IP addresses always begin with 169.254; the latter part of the IP address is semi-random.

Connection to a LAN

Important: Do not connect your DT80 to the network until you’ve configured the DT80 with a suitable IP address and subnet mask, or

selected the "automatic IP address" option. Connecting a device with an invalid or conflicting IP address may cause significant

disruption to the operation of the network.

By connecting the DT80 to a local area network (LAN), the DT80 will be accessible by any of the computers on the LAN,

and possibly also by computers on a wide area network or the Internet, depending on how the LAN is set up.