diff --git a/scripts/network.gd b/scripts/network.gd
index 53e152f..093c117 100644
--- a/scripts/network.gd
+++ b/scripts/network.gd
@@ -401,6 +401,7 @@ func _process(_delta: float) -> void:
     for unit_name: StringName in units_serial:
         var unit_serial: = units_serial[unit_name]
         var serial: = serials[unit_name]
+        serial.tick = tick
         if Error.OK == unit_serial.process(tick):
             serial.send_to(unit_serial.tx_data)
     for unit_name: StringName in units_modbus: