diff --git a/doc/revpimodio2.netio.html b/doc/revpimodio2.netio.html
index c8ed847..98bea51 100644
--- a/doc/revpimodio2.netio.html
+++ b/doc/revpimodio2.netio.html
@@ -211,13 +211,16 @@ Static Methods</h3>
 <a NAME="NetFH.__init__" ID="NetFH.__init__"></a>
 <h3 style="background-color:#FFFFFF;color:#FF0000">
 NetFH (Constructor)</h3>
-<b>NetFH</b>(<i>address, timeout=500</i>)
+<b>NetFH</b>(<i>address, check_replace_ios, timeout=500</i>)
 <p>
 Init NetFH-class.
 </p><dl>
 <dt><i>address</i></dt>
 <dd>
 IP Adresse, Port des RevPi als <class 'tuple'>
+</dd><dt><i>check_replace_ios</i></dt>
+<dd>
+Prueft auf veraenderungen der Datei
 </dd><dt><i>timeout</i></dt>
 <dd>
 Timeout in Millisekunden der Verbindung
diff --git a/eric-revpimodio2.api b/eric-revpimodio2.api
index cff22a8..3d2c2e1 100644
--- a/eric-revpimodio2.api
+++ b/eric-revpimodio2.api
@@ -208,7 +208,7 @@ revpimodio2.netio.NetFH.set_timeout?4(value)
 revpimodio2.netio.NetFH.tell?4()
 revpimodio2.netio.NetFH.timeout?7
 revpimodio2.netio.NetFH.write?4(bytebuff)
-revpimodio2.netio.NetFH?1(address, timeout=500)
+revpimodio2.netio.NetFH?1(address, check_replace_ios, timeout=500)
 revpimodio2.netio.RevPiNetIO._create_myfh?5()
 revpimodio2.netio.RevPiNetIO._get_cpreplaceio?5()
 revpimodio2.netio.RevPiNetIO.disconnect?4()
diff --git a/revpimodio2/netio.py b/revpimodio2/netio.py
index cadb30c..db500ce 100644
--- a/revpimodio2/netio.py
+++ b/revpimodio2/netio.py
@@ -54,20 +54,25 @@ class NetFH(Thread):
 
     """
 
-    __slots__ = "__by_buff", "__int_buff", "__dictdirty", "__flusherr", \
-        "__position", "__sockact", "__sockerr", "__sockend", "__socklock", \
-        "__timeout", "__trigger", "__waitsync", \
-        "_address", "_slavesock", \
-        "daemon"
+    __slots__ = "__by_buff", "__check_replace_ios", "__config_changed", \
+        "__int_buff", "__dictdirty", "__flusherr", "__replace_ios_h", \
+        "__pictory_h",  "__position", "__sockact", "__sockerr", "__sockend", \
+        "__socklock", "__timeout", "__trigger", "__waitsync", "_address", \
+        "_slavesock", "daemon"
 
-    def __init__(self, address, timeout=500):
+    def __init__(self, address, check_replace_ios, timeout=500):
         """Init NetFH-class.
+
         @param address IP Adresse, Port des RevPi als <class 'tuple'>
-        @param timeout Timeout in Millisekunden der Verbindung"""
+        @param check_replace_ios Prueft auf veraenderungen der Datei
+        @param timeout Timeout in Millisekunden der Verbindung
+
+        """
         super().__init__()
         self.daemon = True
 
         self.__by_buff = b''
+        self.__check_replace_ios = check_replace_ios
         self.__config_changed = False
         self.__int_buff = 0
         self.__dictdirty = {}
@@ -148,14 +153,18 @@ class NetFH(Thread):
             so.connect(self._address)
 
             # Hashwerte anfordern
-            so.sendall(_syspictoryh + _sysreplaceioh)
+            recv_len = 16
+            so.sendall(_syspictoryh)
+            if self.__check_replace_ios:
+                so.sendall(_sysreplaceioh)
+                recv_len += 16
 
             # Hashwerte empfangen
             byte_buff = bytearray()
             zero_byte = 0
             while not self.__sockend.is_set() and zero_byte < 100 \
-                    and len(byte_buff) < 32:
-                data = so.recv(32)
+                    and len(byte_buff) < recv_len:
+                data = so.recv(recv_len)
                 if data == b'':
                     zero_byte += 1
                 byte_buff += data
@@ -170,7 +179,8 @@ class NetFH(Thread):
                 self.__pictory_h = byte_buff[:16]
 
             # Änderung an replace_ios prüfen
-            if self.__replace_ios_h and byte_buff[16:] != self.__replace_ios_h:
+            if self.__check_replace_ios and self.__replace_ios_h \
+                    and byte_buff[16:] != self.__replace_ios_h:
                 self.__config_changed = True
                 self.close()
                 raise ConfigChanged(
@@ -710,7 +720,7 @@ class RevPiNetIO(_RevPiModIO):
         """Erstellt NetworkFileObject.
         return FileObject"""
         self._buffedwrite = True
-        return NetFH(self._address)
+        return NetFH(self._address, self._replace_io_file == ":network:")
 
     def _get_cpreplaceio(self):
         """Laed die replace_io Konfiguration ueber das Netzwerk.
@@ -748,7 +758,7 @@ class RevPiNetIO(_RevPiModIO):
     def get_jconfigrsc(self):
         """Laedt die piCotry Konfiguration und erstellt ein <class 'dict'>.
         @return <class 'dict'> der piCtory Konfiguration"""
-        mynh = NetFH(self._address)
+        mynh = NetFH(self._address, False)
         byte_buff = mynh.readpictory()
         mynh.close()
         return jloads(byte_buff.decode("utf-8"))