diff --git a/fhem/CHANGED b/fhem/CHANGED
index 172e4b089..642c665ee 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -12,6 +12,7 @@
   - feature: Retaining configfile comments (not within a define statement)
   - feature: EnOcean PM101 by Ignaz
   - feature: FHEMWEB redirectCmds attribute added
+  - feature: CUL_TX minsecs attribute (by Arno)
 
 - 2011-12-31 (5.2)
   - bugfix:  applying smallscreen attributes to firefox/opera
diff --git a/fhem/FHEM/14_CUL_TX.pm b/fhem/FHEM/14_CUL_TX.pm
index bc2c3d703..124990e7c 100644
--- a/fhem/FHEM/14_CUL_TX.pm
+++ b/fhem/FHEM/14_CUL_TX.pm
@@ -28,11 +28,14 @@ CUL_TX_Define($$)
   my ($hash, $def) = @_;
   my @a = split("[ \t][ \t]*", $def);
 
-  return "wrong syntax: define <name> CUL_TX <code> [corr]"
-        if(int(@a) < 3 || int(@a) > 4);
+  return "wrong syntax: define <name> CUL_TX <code> [corr] [minsecs]"
+        if(int(@a) < 3 || int(@a) > 5);
 
   $hash->{CODE} = $a[2];
   $hash->{corr} = ((int(@a) > 3) ? $a[3] : 0);
+  $hash->{minsecs} = ((int(@a) > 4) ? $a[4] : 0);
+  $hash->{lastT} =  0;
+  $hash->{lastH} =  0;
 
   $modules{CUL_TX}{defptr}{$a[2]} = $hash;
   $hash->{STATE} = "Defined";
@@ -73,6 +76,7 @@ CUL_TX_Parse($$)
     Log 2, "CUL_TX Unknown device $id3, please define it";
     return "UNDEFINED CUL_TX_$id3 CUL_TX $id3" if(!$def);
   }
+  my $now = time();
 
   my $name = $def->{NAME};
 
@@ -83,12 +87,20 @@ CUL_TX_Parse($$)
   my $valraw = ($a[5].$a[6].".".$a[7]);
   my $type = $a[2];
   if($type eq "0") {
+    if($now - $def->{lastT} < $def->{minsecs} ) {
+      return ""; 
+    }
+    $def->{lastT} = $now;
     $msgtype = "temperature";
     $val = sprintf("%2.1f", ($valraw - 50 + $def->{corr}) );
     Log $ll4, "CUL_TX $msgtype $name $id3 T: $val F: $id2";
     $changedTxt = "temperature: $val";
 
   } elsif ($type eq "E") {
+   if($now - $def->{lastH} < $def->{minsecs} ) {
+      return ""; 
+    } else {
+    $def->{lastH} = $now;
     $msgtype = "humidity";
     $val = $valraw;
     Log $ll4, "CUL_TX $msgtype $name $id3 H: $val F: $id2";
diff --git a/fhem/docs/commandref.html b/fhem/docs/commandref.html
index 142718a44..921ba5acb 100644
--- a/fhem/docs/commandref.html
+++ b/fhem/docs/commandref.html
@@ -2497,12 +2497,18 @@ A line ending with \ will be concatenated with the next one, so long lines
   <a name="CUL_TXdefine"></a>
   <b>Define</b>
   <ul>
-    <code>define &lt;name&gt; CUL_TX &lt;code&gt; [corr]</code> <br>
+    <code>define &lt;name&gt; CUL_TX &lt;code&gt; [corr] [minsecs]</code> <br>
+
     <br>
     &lt;code&gt; is the code of the autogenerated address of the TX device (0
     to 127)<br>
     corr is a correction factor, which will be added to the value received from
-    the device.
+    the device.<br>
+    minsecs are the minimum seconds between two log entries or notifications
+    from this device. <br>E.g. if set to 300, logs of the same type will occure
+    with a minimum rate of one per 5 minutes even if the device sends a message
+    every minute. (Reduces the log file size and reduces the time to display
+    the plots)
   </ul>
   <br>