diff -r e3bf5adad75f -r 2d36f36a433c master/globals.h
--- a/master/globals.h	Wed Nov 09 17:07:33 2011 +0100
+++ b/master/globals.h	Thu Jan 12 12:14:33 2012 +0100
@@ -216,6 +216,14 @@
     EC_SDO_ENTRY_ACCESS_COUNT /**< Number of states. */
 };
 
+/** Master devices.
+ */
+enum {
+    EC_DEVICE_MAIN, /**< Main device. */
+    EC_DEVICE_BACKUP, /**< Backup device */
+    EC_NUM_DEVICES /**< Number of devices. */
+};
+
 /*****************************************************************************/
 
 /** Convenience macro for printing EtherCAT-specific information to syslog.