diff --git a/cspse/lmc/subelement_master.py b/cspse/lmc/subelement_master.py
index f20a0c0ae82ca7cb136a14078c6603985465e20a..b27c0dd7b6b1e1a84eb5eb5e45b316aa5307e6c7 100644
--- a/cspse/lmc/subelement_master.py
+++ b/cspse/lmc/subelement_master.py
@@ -42,6 +42,9 @@ class CspSubElementMaster(SKAMaster):
     **Properties:**
 
     - Device Property
+        Racks
+            - The list with the FQDNs of the sub-element racks devices.
+            - Type:'DevVarStringArray'
     """
     # PROTECTED REGION ID(CspSubElementMaster.class_variable) ENABLED START #
     # PROTECTED REGION END #    //  CspSubElementMaster.class_variable
@@ -50,6 +53,10 @@ class CspSubElementMaster(SKAMaster):
     # Device Properties
     # -----------------
 
+    Racks = device_property(
+        dtype='DevVarStringArray',
+    )
+
     # ----------
     # Attributes
     # ----------
@@ -63,7 +70,7 @@ class CspSubElementMaster(SKAMaster):
     onCmdFailure = attribute(
         dtype='DevBoolean',
         label="CBF command failure flag",
-        polling_period=1000,
+        #polling_period=1000,
         doc="Failure flag set when the On command fails with error(s).",
     )
 
@@ -76,7 +83,6 @@ class CspSubElementMaster(SKAMaster):
     offCmdFailure = attribute(
         dtype='DevBoolean',
         label="Off execution failure flag",
-        polling_period=1000,
         doc="Failure flag set when the Off command fails with error(s).",
     )
 
@@ -89,7 +95,6 @@ class CspSubElementMaster(SKAMaster):
     standbyCmdFailure = attribute(
         dtype='DevBoolean',
         label="Standby execution failure message",
-        polling_period=1000,
         doc="Failure flag set when the Standby command fails with error(s).",
     )
 
@@ -102,7 +107,6 @@ class CspSubElementMaster(SKAMaster):
     adminMode = attribute(
         dtype=AdminMode,
         access=AttrWriteType.READ_WRITE,
-        polling_period=1000,
         memorized=True,
         doc="The admin mode reported for this device. It may interpret the current device condition \nand condition of all managed devices to set this. Most possibly an aggregate attribute.",
     )
@@ -110,7 +114,6 @@ class CspSubElementMaster(SKAMaster):
     onCommandProgress = attribute(
         dtype='DevUShort',
         label="Progress percentage for the On command",
-        polling_period=3000,
         abs_change=10,
         max_value=100,
         min_value=0,
@@ -120,7 +123,6 @@ class CspSubElementMaster(SKAMaster):
     offCommandProgress = attribute(
         dtype='DevUShort',
         label="Progress percentage for the Off command",
-        polling_period=3000,
         abs_change=10,
         max_value=100,
         min_value=0,
@@ -130,7 +132,6 @@ class CspSubElementMaster(SKAMaster):
     standbyCommandProgress = attribute(
         dtype='DevUShort',
         label="Progress percentage for the Standby command",
-        polling_period=3000,
         abs_change=10,
         max_value=100,
         min_value=0,
@@ -200,21 +201,18 @@ class CspSubElementMaster(SKAMaster):
     onCmdTimeoutExpired = attribute(
         dtype='DevBoolean',
         label="On execution timeout flag",
-        polling_period=2000,
         doc="Signal the occurence of a timeout during the execution of the on command.",
     )
 
     offCmdTimeoutExpired = attribute(
         dtype='DevBoolean',
         label="Off execution timeout flag",
-        polling_period=2000,
         doc="Signal the occurence of a timeout during the execution of the Off command.",
     )
 
     standbyCmdTimeoutExpired = attribute(
         dtype='DevBoolean',
         label="Standby execution timeout flag.",
-        polling_period=2000,
         doc="Signal the occurence of a timeout during the execution of the Standby command.",
     )
 
diff --git a/docker/config/csplmc_dsconfig.json b/docker/config/csplmc_dsconfig.json
index 83dbae68ba3d9bf32fe5e2e589b86ba3bf171144..29d976ddfa1244ce65eae47a50dbf041444c2aef 100644
--- a/docker/config/csplmc_dsconfig.json
+++ b/docker/config/csplmc_dsconfig.json
@@ -27,32 +27,6 @@
 				"subelement/rack/02",
 				"subelement/rack/03",
 				"subelement/rack/04"
-			    ],
-                            "polled_attr": [
-                                "healthstate", 
-                                "1000", 
-                                "adminmode", 
-                                "1000", 
-                                "state", 
-				"1000",
-                                "oncommandprogress", 
-                                "2000", 
-                                "offcommandprogress", 
-                                "2000", 
-                                "standbycommandprogress", 
-                                "2000", 
-                                "oncmdtimeoutexpired", 
-                                "1000", 
-                                "offcmdtimeoutexpired", 
-                                "1000", 
-                                "standbycmdtimeoutexpired", 
-                                "1000", 
-                                "oncmdfailure", 
-                                "1000", 
-                                "offcmdfailure", 
-                                "1000", 
-                                "standbycmdfailure", 
-                                "1000" 
                             ]
                         }
                     }
@@ -151,19 +125,7 @@
                         "properties": {
                             "SubID": [
                                 "1"
-                            ], 
-                            "polled_attr": [
-                                "state", 
-                                "1000", 
-                                "healthstate", 
-                                "1000", 
-                                "adminmode", 
-                                "1000", 
-                                "obsstate", 
-                                "1000",
-                                "obsmode", 
-                                "1000"
-                            ]
+                            ] 
                         }
                     }
                 }
@@ -197,19 +159,7 @@
                         "properties": {
                             "SubID": [
                                 "2"
-                            ], 
-                            "polled_attr": [
-                                "state", 
-                                "1000", 
-                                "healthstate", 
-                                "1000", 
-                                "adminmode", 
-                                "1000", 
-                                "obsstate", 
-                                "1000",
-                                "obsmode", 
-                                "1000"
-                            ]
+                            ] 
                         }
                     }
                 }
diff --git a/pogo/CspSubElementMaster.xmi b/pogo/CspSubElementMaster.xmi
index 567b8c2bd59b6d334d04ccc23f231cbabdf7f585..0abe206bc1527317ac3396b899b2ee31bb20d166 100644
--- a/pogo/CspSubElementMaster.xmi
+++ b/pogo/CspSubElementMaster.xmi
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="ASCII"?>
 <pogoDsl:PogoSystem xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:pogoDsl="http://www.esrf.fr/tango/pogo/PogoDsl">
   <classes name="CspSubElementMaster" pogoRevision="9.6">
-    <description description="A base class for the Master of a SKA Sub-element." title="CSP.LMC Sub-element Master" sourcePath="/home/softir/src/ska-git/csp-lmc-subelement/pogo" language="PythonHL" filestogenerate="XMI   file,Code files,Protected Regions" license="GPL" copyright="INAF-SKA Telescope" hasMandatoryProperty="false" hasConcreteProperty="false" hasAbstractCommand="false" hasAbstractAttribute="false">
+    <description description="A base class for the Master of a SKA Sub-element." title="CSP.LMC Sub-element Master" sourcePath="/home/softir/src/ska-git/csp-lmc-subelement/pogo" language="PythonHL" filestogenerate="XMI   file,Code files,Protected Regions" license="GPL" copyright="INAF-SKA Telescope" hasMandatoryProperty="false" hasConcreteProperty="true" hasAbstractCommand="false" hasAbstractAttribute="false">
       <inheritances classname="Device_Impl" sourcePath=""/>
       <inheritances classname="SKABaseDevice" sourcePath="../../lmc-base-classes/pogo"/>
       <inheritances classname="SKAMaster" sourcePath="/home/softir/src/ska-git/lmc-base-classes/pogo"/>
@@ -38,6 +38,10 @@
       <type xsi:type="pogoDsl:StringVectorType"/>
       <status abstract="false" inherited="true" concrete="true"/>
     </deviceProperties>
+    <deviceProperties name="Racks" description="The list with the FQDNs of the sub-element racks devices.">
+      <type xsi:type="pogoDsl:StringVectorType"/>
+      <status abstract="false" inherited="false" concrete="true" concreteHere="true"/>
+    </deviceProperties>
     <commands name="State" description="This command gets the device state (stored in its device_state data member) and returns it to the caller." execMethod="dev_state" displayLevel="OPERATOR" polledPeriod="0">
       <argin description="none">
         <type xsi:type="pogoDsl:VoidType"/>
@@ -169,7 +173,7 @@
       <status abstract="false" inherited="false" concrete="true" concreteHere="true"/>
       <properties description="Number of devices that completed the task" label="Number of devices that completed the task" unit="" standardUnit="" displayUnit="" format="" maxValue="" minValue="" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
     </attributes>
-    <attributes name="onCmdFailure" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="1000" maxX="" maxY="" allocReadMember="true" isDynamic="false">
+    <attributes name="onCmdFailure" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="true" isDynamic="false">
       <dataType xsi:type="pogoDsl:BooleanType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -185,7 +189,7 @@
       <status abstract="false" inherited="false" concrete="true" concreteHere="true"/>
       <properties description="Failure message when the On command fails with error(s)." label="On execution failure message" unit="" standardUnit="" displayUnit="" format="" maxValue="" minValue="" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
     </attributes>
-    <attributes name="offCmdFailure" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="1000" maxX="" maxY="" allocReadMember="true" isDynamic="false">
+    <attributes name="offCmdFailure" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="true" isDynamic="false">
       <dataType xsi:type="pogoDsl:BooleanType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -201,7 +205,7 @@
       <status abstract="false" inherited="false" concrete="true" concreteHere="true"/>
       <properties description="Failure message when the Off command fails with error(s)." label="Off execution failure message" unit="" standardUnit="" displayUnit="" format="" maxValue="" minValue="" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
     </attributes>
-    <attributes name="standbyCmdFailure" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="1000" maxX="" maxY="" allocReadMember="true" isDynamic="false">
+    <attributes name="standbyCmdFailure" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="true" isDynamic="false">
       <dataType xsi:type="pogoDsl:BooleanType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -231,7 +235,7 @@
       <status abstract="false" inherited="true" concrete="true"/>
       <properties description="The health state reported for this device. It interprets the current device condition &#xA;and condition of all managed devices to set this. Most possibly an aggregate attribute." label="" unit="" standardUnit="" displayUnit="" format="" maxValue="" minValue="" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
     </attributes>
-    <attributes name="adminMode" attType="Scalar" rwType="READ_WRITE" displayLevel="OPERATOR" polledPeriod="1000" maxX="" maxY="" memorized="true" allocReadMember="true">
+    <attributes name="adminMode" attType="Scalar" rwType="READ_WRITE" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" memorized="true" allocReadMember="true">
       <dataType xsi:type="pogoDsl:EnumType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -259,7 +263,7 @@
       <status abstract="false" inherited="true" concrete="true"/>
       <properties description="The test mode of the device. &#xA;Either no test mode (empty string) or an indication of the test mode." label="" unit="" standardUnit="" displayUnit="" format="" maxValue="" minValue="" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
     </attributes>
-    <attributes name="onCommandProgress" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="3000" maxX="" maxY="" allocReadMember="false" isDynamic="false">
+    <attributes name="onCommandProgress" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="false" isDynamic="false">
       <dataType xsi:type="pogoDsl:UShortType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -268,7 +272,7 @@
       <properties description="Percentage progress implemented for commands that  result in state/mode transitions for a large &#xA;number of components and/or are executed in stages (e.g power up, power down)" label="Progress percentage for the On command" unit="" standardUnit="" displayUnit="" format="" maxValue="100" minValue="0" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
       <eventCriteria relChange="" absChange="10" period=""/>
     </attributes>
-    <attributes name="offCommandProgress" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="3000" maxX="" maxY="" allocReadMember="false" isDynamic="false">
+    <attributes name="offCommandProgress" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="false" isDynamic="false">
       <dataType xsi:type="pogoDsl:UShortType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -277,7 +281,7 @@
       <properties description="Percentage progress implemented for commands that  result in state/mode transitions for a large &#xA;number of components and/or are executed in stages (e.g power up, power down)" label="Progress percentage for the Off command" unit="" standardUnit="" displayUnit="" format="" maxValue="100" minValue="0" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
       <eventCriteria relChange="" absChange="10" period=""/>
     </attributes>
-    <attributes name="standbyCommandProgress" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="3000" maxX="" maxY="" allocReadMember="false" isDynamic="false">
+    <attributes name="standbyCommandProgress" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="false" isDynamic="false">
       <dataType xsi:type="pogoDsl:UShortType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -340,7 +344,7 @@
       <properties description="Report the measured duration of the Standby command" label="Measured duration (sec) of the Standby command" unit="" standardUnit="" displayUnit="" format="" maxValue="100" minValue="0" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
       <eventCriteria relChange="" absChange="0" period=""/>
     </attributes>
-    <attributes name="onCmdTimeoutExpired" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="2000" maxX="" maxY="" allocReadMember="true" isDynamic="false">
+    <attributes name="onCmdTimeoutExpired" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="true" isDynamic="false">
       <dataType xsi:type="pogoDsl:BooleanType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -349,7 +353,7 @@
       <properties description="Signal the occurence of a timeout during the execution of the on command." label="On execution timeout flag" unit="" standardUnit="" displayUnit="" format="" maxValue="" minValue="" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
       <eventCriteria relChange="" absChange="1" period=""/>
     </attributes>
-    <attributes name="offCmdTimeoutExpired" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="2000" maxX="" maxY="" allocReadMember="true" isDynamic="false">
+    <attributes name="offCmdTimeoutExpired" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="true" isDynamic="false">
       <dataType xsi:type="pogoDsl:BooleanType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -358,7 +362,7 @@
       <properties description="Signal the occurence of a timeout during the execution of the Off command." label="Off execution timeout flag" unit="" standardUnit="" displayUnit="" format="" maxValue="" minValue="" maxAlarm="" minAlarm="" maxWarning="" minWarning="" deltaTime="" deltaValue=""/>
       <eventCriteria relChange="" absChange="1" period=""/>
     </attributes>
-    <attributes name="standbyCmdTimeoutExpired" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="2000" maxX="" maxY="" allocReadMember="true" isDynamic="false">
+    <attributes name="standbyCmdTimeoutExpired" attType="Scalar" rwType="READ" displayLevel="OPERATOR" polledPeriod="0" maxX="" maxY="" allocReadMember="true" isDynamic="false">
       <dataType xsi:type="pogoDsl:BooleanType"/>
       <changeEvent fire="false" libCheckCriteria="false"/>
       <archiveEvent fire="false" libCheckCriteria="false"/>
@@ -429,5 +433,7 @@
       <status abstract="false" inherited="true" concrete="true"/>
     </states>
     <preferences docHome="./doc_html" makefileHome="/usr/local/share/pogo/preferences"/>
+    <overlodedPollPeriodObject name="adminMode" type="attribute" pollPeriod="0"/>
+    <overlodedPollPeriodObject name="adminMode" type="attribute" pollPeriod="0"/>
   </classes>
 </pogoDsl:PogoSystem>
diff --git a/setup.cfg b/setup.cfg
index 90ecf5789f9198495ae56daa35e81460c6f240bf..ed35f2e6ee67a2831adc20130554f1d07af8983b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -11,7 +11,8 @@ source = cspse
 
 [tool:pytest]
 testpaths = tests
-addopts = --cov=cspse 
+addopts = --verbose
+          --cov=cspse 
           --json-report 
           --json-report-file=htmlcov/report.json 
           --cov-report=term 
@@ -21,6 +22,9 @@ addopts = --cov=cspse
 
 junit_family=legacy
 console_output_style = progress
+
+[coverage:report]
+show_missing = True
 # Define `python setup.py build_sphinx`
 [build_sphinx]
 source-dir = docs
diff --git a/tests/test_se_master.py b/tests/test_se_master.py
index 94d9e4b84648e31690caacbf4e55244c012df2f4..a598ec38a983f0c8591894c47c96549c8f7b0cd6 100644
--- a/tests/test_se_master.py
+++ b/tests/test_se_master.py
@@ -273,3 +273,15 @@ class TestCspSubElementMaster(object):
         assert tango_context.device.offCmdDurationExpected == 30
         assert tango_context.device.standbyCmdDurationExpected == 30
 
+    def test_set_command_duration_expected(self, tango_context):
+        """Test xxxCmdDurationExpected attributes"""
+        tango_context.device.onCmdDurationExpected = 20
+        tango_context.device.offCmdDurationExpected = 20
+        tango_context.device.standbyCmdDurationExpected = 20
+        # wait to let the polling thread update the attrs value
+        time.sleep(3)
+        assert tango_context.device.onCmdDurationExpected == 20
+        assert tango_context.device.offCmdDurationExpected == 20
+        assert tango_context.device.standbyCmdDurationExpected == 20
+
+