diff -r a89e2bedf004 -r c14b6bb14fdf master/fmmu_config.c
--- a/master/fmmu_config.c	Thu Apr 29 14:05:15 2010 +0200
+++ b/master/fmmu_config.c	Thu Apr 29 16:33:32 2010 +0200
@@ -43,14 +43,12 @@
 
 /** FMMU configuration constructor.
  *
- * Inits an FMMU configuration, sets the logical start address and adds the
- * process data size for the mapped PDOs of the given direction to the domain
- * data size.
+ * Inits an FMMU configuration and the process data size forthe mapped PDOs
+ * of the given direction to the domain data size.
  */
 void ec_fmmu_config_init(
         ec_fmmu_config_t *fmmu, /**< EtherCAT FMMU configuration. */
         ec_slave_config_t *sc, /**< EtherCAT slave configuration. */
-        ec_domain_t *domain, /**< EtherCAT domain. */
         uint8_t sync_index, /**< Sync manager index to use. */
         ec_direction_t dir /**< PDO direction. */
         )
@@ -59,14 +57,32 @@
     fmmu->sc = sc;
     fmmu->sync_index = sync_index;
     fmmu->dir = dir;
-
-    fmmu->logical_start_address = domain->data_size;
     fmmu->data_size = ec_pdo_list_total_size(
             &sc->sync_configs[sync_index].pdos);
+}
 
+
+/*****************************************************************************/
+
+/** Sets FMMU domain
+ *
+ * Sets the logical start address and the size of the transmitted data
+ */
+void ec_fmmu_config_domain(
+        ec_fmmu_config_t *fmmu, /**< EtherCAT FMMU configuration. */
+        ec_domain_t *domain, /**< EtherCAT domain. */
+        uint32_t logical_start_address, /**< FMMU logical start address. */
+        size_t tx_size /**< Size of transmitted data */
+        )
+{
+    fmmu->domain = domain;
+    fmmu->domain_address = domain->data_size;
+    fmmu->logical_start_address = logical_start_address;
+    fmmu->tx_size = tx_size;
     ec_domain_add_fmmu_config(domain, fmmu);
 }
 
+
 /*****************************************************************************/
 
 /** Initializes an FMMU configuration page.
@@ -80,9 +96,9 @@
         )
 {
     if (fmmu->sc->master->debug_level) {
-        EC_DBG("FMMU: LogAddr 0x%08X, Size %3u, PhysAddr 0x%04X, SM%u, "
-                "Dir %s\n", fmmu->logical_start_address, fmmu->data_size,
-               sync->physical_start_address, fmmu->sync_index,
+        EC_DBG("FMMU: LogAddr 0x%08X, DomAddr 0x%08X, Size %3u, Tx %3u, PhysAddr 0x%04X, SM%u, "
+                "Dir %s\n", fmmu->logical_start_address, fmmu->domain_address, fmmu->data_size,
+                fmmu->tx_size, sync->physical_start_address, fmmu->sync_index,
                fmmu->dir == EC_DIR_INPUT ? "in" : "out");
     }