diff -r 3ed80c8ed616 -r 78929d878b2c master/fsm_master.c
--- a/master/fsm_master.c	Fri Mar 09 13:16:12 2007 +0000
+++ b/master/fsm_master.c	Fri Mar 09 13:24:15 2007 +0000
@@ -705,12 +705,11 @@
 
     EC_INFO("Bus scanning completed.\n");
 
-    ec_master_calc_addressing(master);
-
     // set initial states of all slaves to PREOP to make mailbox
     // communication possible
     list_for_each_entry(slave, &master->slaves, list) {
-        ec_slave_request_state(slave, EC_SLAVE_STATE_PREOP);
+        if (slave->requested_state == EC_SLAVE_STATE_UNKNOWN)
+            ec_slave_request_state(slave, EC_SLAVE_STATE_PREOP);
     }
 
     fsm->state = ec_fsm_master_state_end;