diff --git a/fhem/FHEM/67_ECMDDevice.pm b/fhem/FHEM/67_ECMDDevice.pm
index 863152f72..b992fd86e 100644
--- a/fhem/FHEM/67_ECMDDevice.pm
+++ b/fhem/FHEM/67_ECMDDevice.pm
@@ -154,7 +154,7 @@ ECMDDevice_Set($@)
         }
 
         my $ecmd= $IOhash->{fhem}{classDefs}{$classname}{sets}{$cmdname}{cmd};
-        my $params= $IOhash->{fhem}{classDefs}{$classname}{gets}{$cmdname}{params};
+        my $params= $IOhash->{fhem}{classDefs}{$classname}{sets}{$cmdname}{params};
 
         my %specials= ECMDDevice_DeviceParams2Specials($hash);
         # add specials for command
@@ -173,7 +173,7 @@ ECMDDevice_Set($@)
         my $r = ECMDDevice_AnalyzeCommand($ecmd);
 
         my $v= IOWrite($hash, $r);
-        $v= $params if($params);
+        $v= join(" ", @a) if($params);
 
         return ECMDDevice_Changed($hash, $cmdname, $v);
 
diff --git a/fhem/docs/commandref.html b/fhem/docs/commandref.html
index 47e221f0e..ae3500a85 100644
--- a/fhem/docs/commandref.html
+++ b/fhem/docs/commandref.html
@@ -3782,7 +3782,7 @@ Attributes:<br>
                 </li>
 
                 <li>
-                <code>set &lt;name&gt; params &lt;parameter1&gt; [&lt;parameter2&gt; [&lt;parameter3&gt; ... ]]</code>
+                <code>set &lt;name&gt; params &lt;parameter1&gt; [&lt;parameter2&gt; [&lt;parameter3&gt; ... ]]</code><br>
                 <code>get &lt;name&gt; params &lt;parameter1&gt; [&lt;parameter2&gt; [&lt;parameter3&gt; ... ]]</code>
                 <br><br>
                 Declares the names of the named parameters that must be present in the