diff --git a/fhem/FHEM/99_Utils.pm b/fhem/FHEM/99_Utils.pm
index cbe088cdb..e771dfcbe 100644
--- a/fhem/FHEM/99_Utils.pm
+++ b/fhem/FHEM/99_Utils.pm
@@ -21,21 +21,46 @@ time_str2num($)
 }
 
 sub
-min($$)
+min($@)
 {
-  my ($a,$b) = @_;
-  return $a if($a lt $b);
-  return $b;
+  my ($min, @vars) = @_; 
+  for (@vars) {
+    $min = $_ if $_ lt $min;
+  }           
+  return $min;
 }
 
 sub
-max($$)
+max($@)
 {
-  my ($a,$b) = @_;
-  return $a if($a gt $b);
-  return $b;
+  my ($max, @vars) = @_; 
+  for (@vars) {
+    $max = $_ if $_ gt $max;
+  }           
+  return $max;
 }
 
+sub
+minNum($@)
+{             
+  my ($min, @vars) = @_; 
+  for (@vars) {
+    $min = $_ if $_ < $min;
+  }           
+  return $min;
+}
+
+sub
+maxNum($@)
+{             
+  my ($max, @vars) = @_; 
+  for (@vars) {
+    $max = $_ if $_ > $max;
+  }           
+  return $max;
+}
+
+
 sub
 abstime2rel($)
 {