Rockwell Automation DeviceNet SEMINAR LAB EX - Manual (Page 53)

DeviceNet Seminar Lab Exercises 53
Publication 1787.6.1 - August 1997
3. In the New Device Settings box, scroll the list and choose node 55.
4. Choose
Notice that the RediSTATION operator interface’s red light starts
blinking, the DL10 Dataliner display shows a PHOTO OFF
DEVICENET message, and the scanner display alternatively blinks
between 72 and 07. Also, the green status indicator on the photoeye
should be blinking green.
The reason for the above warning messages is that the 1747-SDN scanner
module is expecting a slave device (the photoeye) at node address 7. By
changing the node address to 55, node 7 has “disappeared”. This
disappearance sets a fault bit in the scanner’s memory, which can be read
by the SLC processor to display fault diagnostics, such as flashing a red
light or displaying a text message. Also, the photoeye with its new node
address no longer has a master to communicate with thus causing it to
flash its green communication status indicator.
Now let’s return the photoeye to node address 7.