Improved resetting number of responding slaves.

master/fsm_master.c

@@ -219,6 +219,8 @@ void ec_fsm_master_state_broadcast(
 
         ec_master_clear_slaves(master);
         fsm->slave_states = 0x00;
+        fsm->slaves_responding = 0; /* reset to trigger rescan on next link
+                                       up. */
     }
     fsm->link_state = master->main_device.link_state;
 

master/master.c

@@ -539,6 +539,10 @@ int ec_master_enter_idle_phase(
     master->fsm_queue_locking_data = NULL;
 
     master->phase = EC_IDLE;
+
+    // reset number of responding slaves to trigger scanning
+    master->fsm.slaves_responding = 0;
+
     ret = ec_master_thread_start(master, ec_master_idle_thread,
             "EtherCAT-IDLE");
     if (ret)