diff --git a/scenes/эмс/yems-boards.gd b/scenes/эмс/yems-boards.gd
index eac8030a..16e8f641 100644
--- a/scenes/эмс/yems-boards.gd
+++ b/scenes/эмс/yems-boards.gd
@@ -310,10 +310,12 @@ class EmsBoard:
         return true
 
     func set_load_done():
+        if unit_ems.cmd_state != unit_ems.CmdState.DONE: return
         state_board = LOADING
         unit_ems.send_load_ems_done(unit_ems.CmdCode.LOAD_EMS_DONE)
 
     func execute_cmd():
+        if unit_ems.cmd_state != unit_ems.CmdState.DONE: return
         if len(cmd_array):
             state_board = WRITE
             var cmd: Array = cmd_array.pop_front()
diff --git a/scripts/yau07.gd b/scripts/yau07.gd
index ca6e1514..9c932da1 100644
--- a/scripts/yau07.gd
+++ b/scripts/yau07.gd
@@ -73,6 +73,8 @@ class YaU07 extends unit.Unit:
                     rc = Error.OK
                     cmd_tick_tx = tick
                     cmd_retry -= 1
+                    cmd_num_tx = (cmd_num_rx + 1) % 0xffff
+                    tx_data.encode_u16(2, cmd_num_tx)
             else:
                 cmd_state = CmdState.FAIL
                 emit_signal('command_fail', self)