Rockwell Automation 198x Modular DeviceNet Starter Auxiliary I/O - Manual (Page 21)

Publication 198-UM001B-EN-P September 2001
Chapter
3
Operation
Chapter Objectives
This chapter contains the following information:
• Configuring the Modular DSA I/O System
• DeviceNet Explicit Messaging
• MOD/Net Status LED
• I/O Status LED
Basic Configuration
This section will provide the user with the basic steps of bringing up a device, such as the
MDSA, on DeviceNet. This section will assume that the user has RSNetworx and a
Cat. No. 1770-KFD module.
The first step to setting up a system is to power up the device. Once the DeviceNet module is
powered up it will attempt to determine the network baud rate of the other devices on the
network. After determining the network baud rate, it will set its baud rate to the same baud.
While the module is determining the baud rate of the network, the MOD/NET Status LED
will blink green for 1/4 second, red for 1/4 second, and then turn off.
Once the proper baud rate is set, the MOD/NET LED will either blink green or turn solid
green if a connection is established between it and another device. If the LED turns solid red,
it has failed the duplicate MAC ID check. The above sequence is done when the Autobuad
rate is enabled. This sequence can be disabled to allow a baud rate to be manually configured
(see Advanced Topics, page 3-14).
Once the unit has determined the baud rate of the network, the MOD/NET Status LED will
be solid green, indicating that the device is on-line and operating in a normal condition. The
I/O Status LED will be solid red, indicating that the configuration of the I/O modules has
not been accepted.
IMPORTANT
If there is no traffic on the network, the device will not be able to
determine a network baud rate. The MOD/NET Status LED will
continue to execute the above sequence until network traffic is detected.