diff --git a/abzug.c b/abzug.c
index ad83a48..efa4c0a 100644
--- a/abzug.c
+++ b/abzug.c
@@ -40,8 +40,8 @@ void do_abzug(){
     }
 
     if (read_Input(BTN_ABZUG_PLUS, RISING)) {
-        if(abzug_speed <= 900)
-            abzug_speed += 100;
+        if(abzug_speed <= 990)
+            abzug_speed += 10;
         else
             abzug_speed = 1000;
 #if PLC_MQTT_ENABLED
@@ -50,8 +50,8 @@ void do_abzug(){
     }
 
     if (read_Input(BTN_ABZUG_MINUS, RISING)) {
-        if(abzug_speed >= 110)
-            abzug_speed -= 100;
+        if(abzug_speed >= 20)
+            abzug_speed -= 10;
         else
             abzug_speed = 10;
 #if PLC_MQTT_ENABLED
@@ -60,8 +60,8 @@ void do_abzug(){
     }
 
     if (read_Input(BTN_ABZUG_PLUS_FEIN, RISING)) {
-        if(abzug_speed <= 990)
-            abzug_speed += 10;
+        if(abzug_speed <= 999)
+            abzug_speed += 1;
         else
             abzug_speed = 1000;
 #if PLC_MQTT_ENABLED
@@ -70,8 +70,8 @@ void do_abzug(){
     }
 
     if (read_Input(BTN_ABZUG_MINUS_FEIN, RISING)) {
-        if(abzug_speed >= 20)
-            abzug_speed -= 10;
+        if(abzug_speed >= 11)
+            abzug_speed -= 1;
         else
             abzug_speed = 10;
 #if PLC_MQTT_ENABLED