Technical data

www.asti-usa.com ASTi DACS: Operation & Maintenance Manual (Version 4, Rev. B.1)

The Local Address is the IP address of the DACS (for host communications). The TX Destination

is the IP address of the Host Computer. These numbers should agree with the addresses on the

host computer.

UDP P

ackets rx (received) and tx (transmitted) is the number of packets received and sent to the

host computer. If the rx number is incrementing, it means the DACS is receiving packets from the

host. If the tx number is incrementing, it means the DACS is sending packets back to the host.

RX Good Count

and RX Errors indicate the number of good and bad packets received from the

host. If the RX good count is not incrementing, either the host is not sending packets to the DACS

(or it’s sending them to the wrong address), or the network is not connected.

The ARP request tx

is incremented when the DACS goes out and looks for the host computer. If it

ﬁnds it (that is, the host computer responds to the query), it will increment this only occasionally.

If not, the DACS will continue to interrogate the network and this counter will increment about

once a second. If the host computer replies, the ARP reply rx

will increment.

The ARP request rx is incremented when the host computer looks for the DACS. The DACS

should respond, and increment the ARP Reply

Tx counter. When operating correctly, these

counters will increment very slowly.

Errors Page: The Errors Page is on the Main Menu. If any errors or warnings occur, an error (or

warning) message is printed here as well as displayed at the bottom of the screen.

Isolating Hardware Failures

The following procedure should be used to isolate suspected hardware faults down to the module

level.

To check the status word, go to the Host Interface Menu, and then the Ethernet Control window.

The status byte is towards the bottom of the page after the word “Error:”. If the number is zero no

error has occurred.