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MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
DEVICENET PROTOCOL
CHAPTER 4: FIELDBUS INTERFACE
14. You will be prompted to download the changes to the 1747-SDN module:
15. Click
Yes
to download the new configuration.
The next step is to enable the ADR for the MM300 relay.
DeviceNet setup and configuration (ADR)
Overview of ADR
Auto-Device Replacement, or ADR, is feature of Allen-Bradley scanners that automates the
replacement of a failed device on a DeviceNet network, returning it to the prior level of
operation without having to use a software tool. It consists of two distinct features:
Configuration Recovery, or CR, refers to the scanner's ability to store a device's
configuration. With this feature enabled, the scanner will download this stored
configuration to the device before it begins to exchange I/O data with that device.
Auto Address Recovery, or AAR, refers to the ability of the scanner to change a device's
node address from 63 (the default address) to that desired by the scanner. For example,
when the scanner loses a connection to the device at node address #37, it will continually
query the device's identity at node address #63. When a device is found that matches the
Electronic Key of the devices that the scanner lost at node address #37, it will attempt to
change its node address to node address #37. Upon success, the device's configuration
will be downloaded.
There are some restrictions fo keep in mind:
•
Both CR and AAR can only be used with devices that are in the scanlist of the scanner.
•
AAR can only be enabled for a device if CR is also enabled.
•
CR cannot be enabled for devices that have no writeable parameters.
•
AAR will not work for devices that do not support changing the node address over the
network.
•
In the MM300, only the contents of the A1 object are supported by ADR.
Enabling ADR
NOTE
NOTE:
Before proceeding to the next step ensure that the MM300 relay and the network are
configured as desired. These configurations will be then stored in the scanner for the ADR
feature.
1.
Start
RSNetworx
and open the existing project file. If no project exists, create a new
file.
2.
Browse or go On-Line with a network that is configured as desired
3.
Once the network appears on the screen, Right Click the mouse (Do NOT right click on
a device).
4.
Click
Upload from Network
.
5.
Save
File when all devices have been uploaded.
6.
Double Click on
Scanner
.
7.
Click on the
ADR
tab.
8.
Click on the
Enable Auto Address Recovery
box.
