YASKAWA 1000 Series Technical Manual page 77

12 Troubleshooting
If the scanner reads the Configuration Consistency Value (CCV), it will use this value to determine if a download will
occur. If the CCV in the scanner does not equal the CCV in the DeviceNet node, the configuration information saved in
the scanner will be downloaded to the DeviceNet node. In this implementation of DeviceNet, the CCV will always be 0.
Auto Address Recovery (AAR)
AAR is the ability of the scanner to change the MAC ID of a node to a predetermined MAC ID. To use this feature the
DeviceNet node must have its MAC ID switch (F6-50) set to 64 and its actual MAC ID (F6-63) equal to 63.
If the recovering node is a replacement for another device, putting the new device on the network enables the AAR
feature. A scanner with AAR enabled will search the network for a node with a MAC ID of 63 and then read its
Electronic Key. If the Electronic Key matches the node being replaced, the scanner will change these MAC ID of the
found device to the MAC ID of the device it is replacing.
After the MAC ID is changed, the device sends its duplicate MAC IDs and executes the CR feature. Example: With
current Rockwell PLCs, the AAR feature can only be enabled if the CR feature is also enabled.
YASKAWA ELECTRIC SIEP C730600 43B 1000-Series Option SI-N3 Technical Manual 77