diff --git a/src/datIf.cpp b/src/datIf.cpp
index 8b7b71e..87a294a 100644
--- a/src/datIf.cpp
+++ b/src/datIf.cpp
@@ -350,9 +350,20 @@ char T_datif::datif_cycleSend()
 char T_datif::sendINrequestsAutomatic(void)
 {
     //qDebug() << "send IN request " << dif_scanStep;
-//    uint8_t datif_autoRequCommandList[50]={11, 12, 18, 104, 106, 103, 14, 27, 109, 17, 19, 23, 30, 31, 32, 33, 114, 35};
-    uint8_t datif_autoRequCommandList[30]={11, 12, 14, 17, 18, 19, 22, 23, 27, 30, 31, 32, 33, 35, 102, 103, 104, 106, 107, 109, 114,0,0,0,0,0,0,0,0,0};
-    uint8_t datif_maxNrCommands=21, datif_sendNow;
+    //uint8_t datif_autoRequCommandList[30]={11, 12, 14, 17, 18, 19, 22, 23, 27, 30,
+    //                                       31, 32, 33, 35, 102, 103, 104, 106, 107, 109,
+    //                                       114,0,0,0,0,0,0,0,0,0};
+
+    // extension 6.12.23, complete list:
+    uint8_t datif_autoRequCommandList[40]={11, 12, 13, 14, 17, 18, 19, 21, 22, 23,
+                                           24, 25, 27, 30, 31, 32, 33, 35, 39, 40,
+                                           41, 42, 102,103,104,106,107,108,109,110,
+                                           112,113,114,115,116,0,  0,  0,  0,  0};
+    uint8_t datif_maxNrCommands=35, datif_sendNow;
+
+    // send quicker while transaction is ongoing:
+    uint8_t datif_vendRequCommandList[15]={102,107,108,110,112,115,116,31,32,40,41,42,0,0,0};
+    uint8_t datif_maxVendingCmds=12;
 
     // special commands:
     // 102: get IOs run constantly!!!
@@ -362,40 +373,44 @@ char T_datif::sendINrequestsAutomatic(void)
     // 107, 22: MDB: poll if needed
 
     doRepeat=true;  // 20.9.23 15uhr (after release)
-    if (datif_sendSlowCmd>0)
-    {
-        // send special command, slowly
-        datif_sendNow=datif_autoRequCommandList[datif_pNextCmd++];
-        if (datif_pNextCmd >= datif_maxNrCommands)
-            datif_pNextCmd=0;
-        if (datif_sendNow>0)    // never send Command 0
-            datif_sendIOrequest(0, datif_sendNow, 0);
-        else
-            datif_pNextCmd=0;       // falls in der Liste 0 vorkommt dann von vorne beginnen
 
-        //qDebug()<< "datif send request " << datif_sendNow;
+    if (gpi_getNowCoinPay())
+    {
+        // send only important commands while transaction in progress
+        if (datif_pNextCmd>=datif_maxVendingCmds ) datif_pNextCmd=0;
+        datif_sendNow=datif_vendRequCommandList[datif_pNextCmd++];
+        if (datif_sendNow>0)    // never send Command 0
+        {
+            datif_sendIOrequest(0, datif_sendNow, 0);
+            //qDebug() << "datif, VEND-request: " << datif_sendNow;
+        } else
+            datif_pNextCmd=0;       // falls in der Liste 0 vorkommt dann von vorne beginnen
 
     } else
     {
-        if (gpi_getNowCoinPay())
+        // no transaction, request all but request DI's more frequently
+        if (datif_sendSlowCmd>0)    // send slow and fast commands alternating
         {
-            // request coin input, high priority
-            datif_sendIOrequest(0, 112, 0);
-            //qDebug()<< "datif send request 112 get coins";
+            // send special command, slowly
+            if (datif_pNextCmd>=datif_maxNrCommands ) datif_pNextCmd=0;
+            datif_sendNow=datif_autoRequCommandList[datif_pNextCmd++];
+            if (datif_sendNow>0)    // never send Command 0
+            {
+                datif_sendIOrequest(0, datif_sendNow, 0);
+               // qDebug() << "datif, auto-requ: " << datif_sendNow;
+            } else
+                datif_pNextCmd=0;       // falls in der Liste 0 vorkommt dann von vorne beginnen
         } else
         {
             // request inputs, high priority
             datif_sendIOrequest(0, 31, 0);         // 102
-            // while coin collection DIs are polled slowly with datif_autoRequCommandList[]
-
-            //qDebug()<< "datif send request 102 get DIs";
+            // while coin collection DIs are polled slower
+            //qDebug()<< "datif send requ.31 get DIs";
         }
+        if (++datif_sendSlowCmd>1) datif_sendSlowCmd=0;     // 0,1,0,1,0,1,0....
     }
 
-    if (++datif_sendSlowCmd>1) datif_sendSlowCmd=0;     // 0,1,0,1,0,1,0....
-
     return 0;       // 25.9.2023, wichtig sonst bleibt die komplette PTU stehen!!!!
-
 }
 
 
@@ -439,7 +454,7 @@ char T_datif::loadRecDataFromFrame()
     uint32_t ultmp;
     //int portNr;
     bool ret;
-    uint8_t uctmp;  //, res;      // maxai
+    uint8_t uctmp;  //, nn;  //, res;      // maxai
     char ctmp;
     //static uint8_t lastResult;
     //uint8_t prnResult;
@@ -1061,11 +1076,11 @@ char T_datif::loadRecDataFromFrame()
 /*
             qDebug()<<"datif cmd38 got vault data. blockNr: "<<readAddress;
             if (readAddress==0)
-            for (nn=0; nn<64; nn+=8)
-            {
-                qDebug()<<receivedData[nn]<<" "<<receivedData[nn+1]<<" "<<receivedData[nn+2]<<" "<<receivedData[nn+3]<<" "
-                         <<receivedData[nn+4]<<" "<<receivedData[nn+5]<<" "<<receivedData[nn+6]<<" "<<receivedData[nn+7];
-            }
+                for (nn=0; nn<64; nn+=8)
+                {
+                    qDebug()<<receivedData[nn]<<" "<<receivedData[nn+1]<<" "<<receivedData[nn+2]<<" "<<receivedData[nn+3]<<" "
+                             <<receivedData[nn+4]<<" "<<receivedData[nn+5]<<" "<<receivedData[nn+6]<<" "<<receivedData[nn+7];
+                }
 */
         //}
         break;
@@ -1105,9 +1120,7 @@ char T_datif::loadRecDataFromFrame()
         break;
 
     case 42:        // get BNA box content and value of types
-//        qDebug()<<  "CAmaster datif_got 42 ";
-//        for (uctmp=0; uctmp<64; uctmp++)
-//            qDebug()<<receivedData[uctmp]<<" ";
+        //qDebug()<<  "CAslave datif_got 42";
 
         if (RdDleng>60)
         {