diff --git a/Cargo.lock b/Cargo.lock
index a9f1f9b47072..e2e40ddd1c1d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -157,7 +157,9 @@ checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
 [[package]]
 name = "profirust"
-version = "0.2.0"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2442d1945c741cd17b53e5f9319ab63444f4ed211b4fce763e1bf9a50a0ef04"
 dependencies = [
  "bitflags 2.6.0",
  "bitvec",
diff --git a/Cargo.toml b/Cargo.toml
index 0bf2b8133501..5a2ebc42674c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,4 +6,8 @@ edition = "2021"
 [dependencies]
 env_logger = "0.11.5"
 log = "0.4.22"
-profirust = { version = "0.2.0", path = "../profirust", default-features = false, features = ["phy-linux", "std"] }
+
+[dependencies.profirust]
+version = "0.4.0"
+default-features = false
+features = ["phy-linux", "std"]
diff --git a/src/main.rs b/src/main.rs
index f03f9ca3a8ab..02e609e57e9a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -28,13 +28,14 @@ fn main() -> ! {
             // We use a rather large T_slot time because USB-RS485 converters
             // can induce large delays at times.
             .slot_bits(2500)
-            // .token_rotation_bits(512)
+            // 2 Sekunden Watchdog Timeout
+            .watchdog_timeout(profirust::time::Duration::from_secs(2))
             .build_verified(&dp_master),
     );
     // We must not poll() too often or to little. T_slot / 2 seems to be a good compromise.
     let sleep_time: std::time::Duration = (fdl.parameters().slot_time() / 2).into();
 
-    log::info!("Connecting to the bus...");
+    log::info!("Verbindung mit dem Bus wird aufgebaut...");
     let mut phy = phy::LinuxRs485Phy::new(BUS_DEVICE, fdl.parameters().baudrate);
 
     fdl.set_online();
@@ -55,11 +56,12 @@ fn main() -> ! {
 
         if valve_terminal.is_running(&mut dp_master) {
             tester_io.set_state(tester_io::TesterStatus::ValveTerminalConnected);
+        } else if valve_terminal.error() {
+            tester_io.set_state(tester_io::TesterStatus::Error);
         } else {
             tester_io.set_state(tester_io::TesterStatus::Ready);
         }
 
-
         let scanner_event = dp_scanner.take_last_event();
         match scanner_event {
             Some(dp::scan::DpScanEvent::PeripheralFound(desc)) => {
diff --git a/src/tester_io.rs b/src/tester_io.rs
index b8a36b1650c8..b7ae9bede574 100644
--- a/src/tester_io.rs
+++ b/src/tester_io.rs
@@ -9,6 +9,7 @@
 //! ## Ausgänge
 //! - Leuchtmelder "Test-Station bereit"
 //! - Leuchtmelder "Ventilinsel erkannt"
+//! - Leuchtmelder "Fehler beim Parametrieren"
 
 use profirust::dp;
 
@@ -19,6 +20,8 @@ pub enum TesterStatus {
     Ready,
     /// Ventilinsel erkannt und verbunden
     ValveTerminalConnected,
+    /// Fehler beim Konfigurieren/Parametrieren der Ventilinsel
+    Error,
 }
 
 pub struct TesterIo {
@@ -92,15 +95,17 @@ impl TesterIo {
             // Die 8 Eingänge der ET200B werden auf die 8 Bits für die Ventile gemapped.
             let pi_i = peripheral.pi_i();
             for (i, valve) in self.valve_states.iter_mut().enumerate() {
-                *valve =  pi_i[i / 8] & (1 << (i % 8)) != 0;
+                *valve = pi_i[i / 8] & (1 << (i % 8)) != 0;
             }
 
             // Ausgänge:
             // - Bit 0: Leuchtmelder "Test-Station bereit"
             // - Bit 1: Leuchtmelder "Ventilinsel erkannt"
+            // - Bit 2: Leuchtmelder "Parametrier-Fehler"
             let outputs = match self.tester_status {
                 TesterStatus::Ready => 0x01,
                 TesterStatus::ValveTerminalConnected => 0x02,
+                TesterStatus::Error => 0x04,
             };
             peripheral.pi_q_mut()[0] = outputs;
         }
diff --git a/src/valve_terminal.rs b/src/valve_terminal.rs
index 049fd4ee09c6..3970bc0a8568 100644
--- a/src/valve_terminal.rs
+++ b/src/valve_terminal.rs
@@ -13,6 +13,7 @@ const VALVE_TERMINAL_IDENT_NUMBER: u16 = 0x0a35;
 pub struct ValveTerminal {
     peripheral: dp::PeripheralHandle,
     address: profirust::Address,
+    error: bool,
     valve_states: [bool; 8],
 }
 
@@ -68,6 +69,7 @@ impl ValveTerminal {
         Self {
             peripheral: handle,
             address: default_address,
+            error: false,
             valve_states: [false; 8],
         }
     }
@@ -90,6 +92,8 @@ impl ValveTerminal {
             peripheral.reset_address(address);
             peripheral.pi_q_mut().fill(0u8);
             self.valve_states = [false; 8];
+            self.error = false;
+            self.address = address;
         }
     }
 
@@ -100,7 +104,48 @@ impl ValveTerminal {
         }
     }
 
+    pub fn error(&self) -> bool {
+        self.error
+    }
+
     pub fn update(&mut self, dp_master: &mut dp::DpMaster, events: &dp::DpEvents) {
+        if let Some((handle, event)) = events.peripheral {
+            if handle.address() == self.address {
+                match event {
+                    dp::PeripheralEvent::Configured => {
+                        log::info!("Ventilinsel #{} erfolgreich parametriert!", self.address);
+                    }
+                    dp::PeripheralEvent::ConfigError => {
+                        self.error = true;
+                        log::warn!(
+                            "Fehler beim Konfigurieren der Ventilinsel #{}.",
+                            self.address
+                        );
+                    }
+                    dp::PeripheralEvent::ParameterError => {
+                        self.error = true;
+                        log::warn!(
+                            "Fehler beim Parametrieren der Ventilinsel #{}.",
+                            self.address
+                        );
+                    }
+                    dp::PeripheralEvent::Diagnostics => {
+                        let peripheral = dp_master.get_mut(self.peripheral);
+                        let diagnostics = peripheral.last_diagnostics().unwrap();
+                        log::info!(
+                            "Diagnostics von Ventilinsel #{} gemeldet: {:#?}",
+                            self.address,
+                            diagnostics
+                        );
+                    }
+                    dp::PeripheralEvent::Offline => {
+                        log::info!("Ventilinsel #{} antwortet nicht mehr.", self.address);
+                    }
+                    _ => (),
+                }
+            }
+        }
+
         let peripheral = dp_master.get_mut(self.peripheral);
         if peripheral.is_running() && events.cycle_completed {
             let pi_q = peripheral.pi_q_mut();