diff --git a/doc/revpipyload.html b/doc/revpipyload.html
index a5c7587..4197674 100644
--- a/doc/revpipyload.html
+++ b/doc/revpipyload.html
@@ -132,6 +132,9 @@ Methods</h3>
 <td><a style="color:#0000FF" href="#RevPiPyLoad.xml_plcrunning">xml_plcrunning</a></td>
 <td>Prueft ob das PLC Programm noch lauft.</td>
 </tr><tr>
+<td><a style="color:#0000FF" href="#RevPiPyLoad.xml_plcslaverunning">xml_plcslaverunning</a></td>
+<td>Prueft ob PLC-Slave noch lauft.</td>
+</tr><tr>
 <td><a style="color:#0000FF" href="#RevPiPyLoad.xml_plcslavestart">xml_plcslavestart</a></td>
 <td>Startet den PLC Slave Server.</td>
 </tr><tr>
@@ -342,6 +345,17 @@ Prueft ob das PLC Programm noch lauft.
 <dd>
 True, wenn das PLC Programm noch lauft
 </dd>
+</dl><a NAME="RevPiPyLoad.xml_plcslaverunning" ID="RevPiPyLoad.xml_plcslaverunning"></a>
+<h3 style="background-color:#FFFFFF;color:#FF0000">
+RevPiPyLoad.xml_plcslaverunning</h3>
+<b>xml_plcslaverunning</b>(<i></i>)
+<p>
+Prueft ob PLC-Slave noch lauft.
+</p><dl>
+<dt>Returns:</dt>
+<dd>
+True, wenn PLC-Slave noch lauft
+</dd>
 </dl><a NAME="RevPiPyLoad.xml_plcslavestart" ID="RevPiPyLoad.xml_plcslavestart"></a>
 <h3 style="background-color:#FFFFFF;color:#FF0000">
 RevPiPyLoad.xml_plcslavestart</h3>
diff --git a/eric-revpipyload.api b/eric-revpipyload.api
index 2ebe052..0da5557 100644
--- a/eric-revpipyload.api
+++ b/eric-revpipyload.api
@@ -61,6 +61,7 @@ revpipyload.RevPiPyLoad.xml_getprocimg?4()
 revpipyload.RevPiPyLoad.xml_plcdownload?4(mode="tar", pictory=False)
 revpipyload.RevPiPyLoad.xml_plcexitcode?4()
 revpipyload.RevPiPyLoad.xml_plcrunning?4()
+revpipyload.RevPiPyLoad.xml_plcslaverunning?4()
 revpipyload.RevPiPyLoad.xml_plcslavestart?4()
 revpipyload.RevPiPyLoad.xml_plcslavestop?4()
 revpipyload.RevPiPyLoad.xml_plcstart?4()
diff --git a/revpipyload/revpipyload.py b/revpipyload/revpipyload.py
index de78cd0..3c7392c 100755
--- a/revpipyload/revpipyload.py
+++ b/revpipyload/revpipyload.py
@@ -101,6 +101,7 @@ class RevPiPyLoad():
         self.globalconfig = ConfigParser()
         self.logr = logsystem.LogReader()
         self.plc = None
+        self.plc_pause = False
         self.tfile = {}
         self.tpe = None
         self.xsrv = None
@@ -217,6 +218,9 @@ class RevPiPyLoad():
             self.xsrv.register_function(self.xml_plcstart, "plcstart")
             self.xsrv.register_function(self.xml_plcstop, "plcstop")
             self.xsrv.register_function(self.xml_reload, "reload")
+            self.xsrv.register_function(
+                self.xml_plcslaverunning, "plcslaverunning"
+            )
 
             # Erweiterte Funktionen anmelden
             try:
@@ -258,10 +262,9 @@ class RevPiPyLoad():
                     lambda: os.system(proginit.picontrolreset),
                     "resetpicontrol")
                 self.xsrv.register_function(
-                    self.xml_plcslavestop, "plcslavestop")
+                    self.xml_plcslavestart, "plcslavestart")
                 self.xsrv.register_function(
-                    lambda: os.system(proginit.picontrolreset),
-                    "resetpicontrol")
+                    self.xml_plcslavestop, "plcslavestop")
                 self.xsrv.register_function(
                     self.xml_setconfig, "set_config")
                 self.xsrv.register_function(
@@ -427,7 +430,8 @@ class RevPiPyLoad():
                 and not self.evt_loadconfig.is_set():
 
             # PLC Server Thread prüfen
-            if self.plcslave and not self.th_plcslave.is_alive():
+            if self.plcslave \
+                    and not (self.plc_pause or self.th_plcslave.is_alive()):
                 proginit.logger.warning(
                     "restart plc slave after thread was not running"
                 )
@@ -776,6 +780,13 @@ class RevPiPyLoad():
         else:
             return False
 
+    def xml_plcslaverunning(self):
+        """Prueft ob PLC-Slave noch lauft.
+        @return True, wenn PLC-Slave noch lauft"""
+        proginit.logger.debug("xmlrpc call plcslaverunning")
+        return False if self.th_plcslave is None \
+            else self.th_plcslave.is_alive()
+
     def xml_plcslavestart(self):
         """Startet den PLC Slave Server.
 
@@ -785,6 +796,7 @@ class RevPiPyLoad():
             -2: Laeuft bereits
 
         """
+        self.plc_pause = False
         if self.th_plcslave is not None and self.th_plcslave.is_alive():
             return -2
         else:
@@ -798,6 +810,7 @@ class RevPiPyLoad():
     def xml_plcslavestop(self):
         """Stoppt den PLC Slave Server.
         @return True, wenn stop erfolgreich"""
+        self.plc_pause = True
         if self.th_plcslave is not None:
             self.th_plcslave.stop()
             return True