diff --git a/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/LambdaMagnet.kt b/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/LambdaMagnet.kt
index 5684bc1c..70c1afb0 100644
--- a/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/LambdaMagnet.kt
+++ b/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/LambdaMagnet.kt
@@ -23,7 +23,6 @@ import hep.dataforge.control.ports.PortFactory
 import hep.dataforge.control.ports.PortTimeoutException
 import hep.dataforge.description.ValueDef
 import hep.dataforge.exceptions.ControlException
-import hep.dataforge.exceptions.NameNotFoundException
 import hep.dataforge.exceptions.PortException
 import hep.dataforge.meta.Meta
 import hep.dataforge.utils.DateTimeUtils
@@ -104,7 +103,7 @@ open class LambdaMagnet(context: Context, meta: Meta, private val controller: La
 
 
     override fun computeState(stateName: String): Any {
-        when (stateName) {
+       return when (stateName) {
             "current" -> controller.talk(address, timeout) { s2d(getParameter("MC")) }
             "voltage" -> controller.talk(address, timeout) { s2d(getParameter("MV")) }
             "targetCurrent" -> controller.talk(address, timeout) { s2d(getParameter("PC")) }
@@ -112,42 +111,36 @@ open class LambdaMagnet(context: Context, meta: Meta, private val controller: La
             "output" -> controller.talk(address, timeout) { talk("OUT?") == "OK" }
             "monitoring" -> monitorTask != null
             "updating" -> updateTask != null
-            else -> getDefaultState(stateName)
-
+            else -> getLogicalState(stateName)
         }
     }
 
-    override fun requestStateChange(stateName: String, value: Value): Any {
-        return when (stateName) {
+    override fun requestStateChange(stateName: String, value: Value) {
+        when (stateName) {
             "targetCurrent" -> {
-                if (!setParameter("PC", value.doubleValue())) {
-                    reportError("Can't set the target current", null)
-                    Value.NULL
-                } else {
+                if (setParameter("PC", value.doubleValue())) {
                     lastUpdate = DateTimeUtils.now()
-                    value
+                } else {
+                    reportError("Can't set the target current", null)
                 }
             }
             "targetVoltage" -> {
                 if (!setParameter("PV", value.doubleValue())) {
                     reportError("Can't set the target voltage", null)
-                    Value.NULL
-                } else {
-                    value
                 }
             }
-            "speed" -> value
-            "lastUpdate" -> value
             "updating" -> if (value.booleanValue()) {
                 startUpdateTask()
-                true
             } else {
                 stopUpdateTask()
-                false
             }
-            "monitoring" -> i
-            "output" ->
-            else -> throw NameNotFoundException("State not found", stateName)
+            "monitoring" -> if (value.booleanValue()) {
+                startMonitorTask()
+            } else {
+                stopMonitorTask()
+            }
+            "output" -> setOutputMode(value.booleanValue())
+            else -> setLogicalState(stateName, value);
         }
     }
 
@@ -270,8 +263,8 @@ open class LambdaMagnet(context: Context, meta: Meta, private val controller: La
      * @param targetI
      * @param delay
      */
-    @JvmOverloads
-    fun startUpdateTask(delay: Int = DEFAULT_DELAY) {
+
+    private fun startUpdateTask(delay: Int = DEFAULT_DELAY) {
         assert(delay > 0)
         stopUpdateTask()
         val call = {
@@ -295,26 +288,22 @@ open class LambdaMagnet(context: Context, meta: Meta, private val controller: La
 
         updateTask = scheduler.scheduleWithFixedDelay(call, 0, delay.toLong(), TimeUnit.MILLISECONDS)
         listener?.updateTaskStateChanged(getName(), true)
+        setLogicalState("updating", Value.of(true))
     }
 
     @Throws(PortException::class)
-    fun setOutputMode(out: Boolean) {
-        controller.talk(address, timeout) {
-            val outState: Int = if (out) {
-                1
-            } else {
-                0
-            }
-            if (!setParameter("OUT", outState)) {
-                listener?.error(getName(), "Can't set output mode", null)
-            } else {
-                listener?.outputModeChanged(getName(), out)
-            }
+    private fun setOutputMode(out: Boolean) {
+        val outState: Int = if (out) 1 else 0
+        if (!setParameter("OUT", outState)) {
+            listener?.error(getName(), "Can't set output mode", null)
+        } else {
+            requestStateChange("output", Value.of(out))
+            listener?.outputModeChanged(getName(), out)
         }
     }
 
     private fun nextI(measuredI: Double, targetI: Double): Double {
-        assert(measuredI != targetI)
+//        assert(measuredI != targetI)
 
         var step = if (lastUpdate == null) {
             MIN_UP_STEP_SIZE
@@ -345,12 +334,13 @@ open class LambdaMagnet(context: Context, meta: Meta, private val controller: La
     /**
      * Cancel current monitoring task
      */
-    fun stopMonitorTask() {
+    private fun stopMonitorTask() {
         monitorTask?.let {
             it.cancel(true)
             listener?.monitorTaskStateChanged(getName(), false)
             monitorTask = null
         }
+        setLogicalState("output", Value.of(false))
     }
 
     override fun getName(): String {
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSVacDevice.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSVacDevice.kt
index 4a70790f..39bea920 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSVacDevice.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSVacDevice.kt
@@ -9,6 +9,7 @@ import hep.dataforge.context.Context
 import hep.dataforge.control.devices.Device
 import hep.dataforge.control.devices.PortSensor
 import hep.dataforge.control.devices.StateDef
+import hep.dataforge.control.devices.StateDefs
 import hep.dataforge.control.measurements.Measurement
 import hep.dataforge.control.measurements.SimpleMeasurement
 import hep.dataforge.control.ports.Port
@@ -19,11 +20,7 @@ import hep.dataforge.meta.Meta
 import hep.dataforge.values.Value
 import hep.dataforge.values.ValueType.BOOLEAN
 import inr.numass.control.DeviceView
-import javafx.beans.property.BooleanProperty
-import javafx.beans.property.SimpleBooleanProperty
-import javafx.beans.property.SimpleIntegerProperty
-import javafx.beans.property.adapter.JavaBeanBooleanPropertyBuilder
-import tornadofx.*
+import java.lang.Double.parseDouble
 import java.util.regex.Pattern
 
 /**
@@ -34,20 +31,22 @@ import java.util.regex.Pattern
         ValueDef(name = "channel", def = "5"),
         ValueDef(name = "powerButton", type = arrayOf(BOOLEAN), def = "true")
 )
-@StateDef(value = ValueDef(name = "power", info = "Device powered up"), writable = true)
+@StateDefs(
+        StateDef(value = ValueDef(name = "power", info = "Device powered up"), writable = true)
+//        StateDef(value = ValueDef(name = "channel", info = "Measurement channel", type = arrayOf(NUMBER), def = "5"), writable = true)
+)
 @DeviceView(VacDisplay::class)
 class MKSVacDevice(context: Context, meta: Meta) : PortSensor<Double>(context, meta) {
 
-    private val deviceAddress: String
-        get() = getMeta().getString("address", "253")
+    private val deviceAddress: String = meta.getString("address", "253")
 
 
-    val isPowerOnProperty = SimpleBooleanProperty()
-    var isPowerOn by isPowerOnProperty
+//    val isPowerOnProperty = SimpleBooleanProperty()
+//    var isPowerOn by isPowerOnProperty
 
 
-    val channelProperty = SimpleIntegerProperty(meta.getInt("channel", 5))
-    var channel by channelProperty
+//    val channelProperty = SimpleIntegerProperty(meta.getInt("channel", 5))
+//    var channel by channelProperty
 
 
     @Throws(ControlException::class)
@@ -78,9 +77,9 @@ class MKSVacDevice(context: Context, meta: Meta) : PortSensor<Double>(context, m
     }
 
     @Throws(ControlException::class)
-    override fun requestStateChange(stateName: String, value: Value): Any {
+    override fun requestStateChange(stateName: String, value: Value) {
         when (stateName) {
-            "power" -> isPowerOn = value.booleanValue()
+            "power" -> setPower(value.booleanValue())
             else -> super.requestStateChange(stateName, value)
         }
 
@@ -89,24 +88,46 @@ class MKSVacDevice(context: Context, meta: Meta) : PortSensor<Double>(context, m
     @Throws(ControlException::class)
     override fun shutdown() {
         if (isConnected) {
-            isPowerOn = false
+            setState("power",false)
         }
         super.shutdown()
     }
 
-    fun powerOnProperty(): BooleanProperty {
-        try {
-            return JavaBeanBooleanPropertyBuilder().bean(this)
-                    .name("powerOn").getter("isPowerOn").setter("setPowerOn").build()
-        } catch (ex: NoSuchMethodException) {
-            throw Error(ex)
+//    fun powerOnProperty(): BooleanProperty {
+//        try {
+//            return JavaBeanBooleanPropertyBuilder().bean(this)
+//                    .name("powerOn").getter("isPowerOn").setter("setPower").build()
+//        } catch (ex: NoSuchMethodException) {
+//            throw Error(ex)
+//        }
+//
+//    }
+
+    private fun setPower(powerOn: Boolean) {
+        if (powerOn != getLogicalState("power").booleanValue()) {
+            if (powerOn) {
+                //                String ans = talkMKS(p1Port, "@253ENC!OFF;FF");
+                //                if (!ans.equals("OFF")) {
+                //                    LoggerFactory.getLogger(getClass()).warn("The @253ENC!OFF;FF command is not working");
+                //                }
+                val ans = talk("FP!ON")
+                if (ans == "ON") {
+                    setLogicalState("power", true)
+                } else {
+                    this.notifyError("Failed to set power state", null)
+                }
+            } else {
+                val ans = talk("FP!OFF")
+                if (ans == "OFF") {
+                    setLogicalState("power", false)
+                } else {
+                    this.notifyError("Failed to set power state", null)
+                }
+            }
         }
-
     }
 
-    override fun getType(): String {
-        return getMeta().getString("type", "MKS vacuumeter")
-    }
+    override fun getType(): String = meta.getString("type", "MKS vacuumeter")
 
     private inner class MKSVacMeasurement : SimpleMeasurement<Double>() {
 
@@ -114,13 +135,14 @@ class MKSVacDevice(context: Context, meta: Meta) : PortSensor<Double>(context, m
         @Throws(Exception::class)
         override fun doMeasure(): Double? {
             //            if (getState("power").booleanValue()) {
+            val channel = meta.getInt("channel", 5)
             val answer = talk("PR$channel?")
             if (answer == null || answer.isEmpty()) {
                 updateState(PortSensor.CONNECTED_STATE, false)
                 this.updateMessage("No connection")
                 return null
             }
-            val res = java.lang.Double.parseDouble(answer)
+            val res = parseDouble(answer)
             return if (res <= 0) {
                 this.updateMessage("No power")
                 invalidateState("power")
diff --git a/numass-viewer/src/main/kotlin/inr/numass/viewer/StorageView.kt b/numass-viewer/src/main/kotlin/inr/numass/viewer/StorageView.kt
index 9f1488a3..c72b9fdc 100644
--- a/numass-viewer/src/main/kotlin/inr/numass/viewer/StorageView.kt
+++ b/numass-viewer/src/main/kotlin/inr/numass/viewer/StorageView.kt
@@ -224,29 +224,27 @@ class StorageView(private val context: Context = Global.instance()) : View(title
 
     }
 
-    private fun buildContainer(content: Any, parent: Container): Container {
-        return when (content) {
-            is Storage -> {
-                Container(content.fullName.toString(), content)
-            }
-            is NumassSet -> {
-                val id = if (content is NumassDataLoader) {
-                    content.path
-                } else {
-                    content.name
+    private fun buildContainer(content: Any, parent: Container): Container =
+            when (content) {
+                is Storage -> {
+                    Container(content.fullName.toString(), content)
                 }
-                Container(id.toString(), content)
+                is NumassSet -> {
+                    val id: String = if (content is NumassDataLoader) {
+                        content.path.toString()
+                    } else {
+                        content.name
+                    }
+                    Container(id.toString(), content)
+                }
+                is NumassPoint -> {
+                    Container("${parent.id}/${content.voltage}".replace(".", "_"), content)
+                }
+                is Loader -> {
+                    Container(content.path.toString(), content);
+                }
+                else -> throw IllegalArgumentException("Unknown content type: ${content::class.java}");
             }
-            is NumassPoint -> {
-                Container("${parent.id}/${content.voltage}".replace(".", "_"), content)
-            }
-            is Loader -> {
-                Container(content.path.toString(), content);
-            }
-            else -> throw IllegalArgumentException("Unknown content type: ${content::class.java}");
-        }
-
-    }
 
 
 //    private fun getSetName(value: NumassSet): String {