--- a/master/slave_config.c	Mon Jan 04 14:17:31 2010 +0100
+++ b/master/slave_config.c	Thu Jan 21 11:09:31 2010 +0100
@@ -75,7 +75,8 @@
         ec_sync_config_init(&sc->sync_configs[i]);
 
     sc->used_fmmus = 0;
-
+    sc->used_for_fmmu_datagram[EC_DIR_INPUT] = 0;
+    sc->used_for_fmmu_datagram[EC_DIR_OUTPUT] = 0;
     sc->dc_assign_activate = 0x0000;
     sc->dc_sync[0].cycle_time = 0x00000000;
     sc->dc_sync[1].cycle_time = 0x00000000;