diff --git a/FHEM/00_HMLAN.pm b/FHEM/00_HMLAN.pm
index c4ecd61fc..a4ca7f988 100755
--- a/FHEM/00_HMLAN.pm
+++ b/FHEM/00_HMLAN.pm
@@ -927,7 +927,7 @@ sub HMLAN_DoInit($) {##########################################################
   HMLAN_assignIDs($hash);
   HMLAN_writeAesKey($name);
   my $s2000 = sprintf("%02X", HMLAN_secSince2000());
-  HMLAN_SimpleWrite($hash, "T$s2000,04,00,00000000");
+  HMLAN_SimpleWrite($hash, "T$s2000,02,00,00000000");
   $hash->{helper}{setTime} = int(gettimeofday())>>15;
 
   delete $hash->{helper}{ref};
@@ -996,7 +996,7 @@ sub HMLAN_KeepAlive($) {#######################################################
   if( $rht != $hash->{helper}{setTime}){# reset HMLAN watch about each 10h
     $hash->{helper}{setTime} =  $rht;
     my $s2000 = sprintf("%02X", HMLAN_secSince2000());
-    HMLAN_SimpleWrite($hash, "T$s2000,04,00,00000000");
+    HMLAN_SimpleWrite($hash, "T$s2000,02,00,00000000");
   }
   HMLAN_SimpleWrite($hash, "K");
 
@@ -1049,7 +1049,7 @@ sub HMLAN_secSince2000() {#####################################################
   $t += 60*(($l[2]-$g[2] + ((($l[5]<<9)|$l[7]) <=> (($g[5]<<9)|$g[7])) * 24) * 60 + $l[1]-$g[1])
                            # timezone and daylight saving...
         - 946684800        # seconds between 01.01.2000, 00:00 and THE EPOCH (1970)
-        - 7200;            # HM Special
+        - 3600;            # time zone
   return $t;
 }
 sub HMLAN_qResp($$$) {#response-waiting queue##################################