Increase timeout for DcDataValid to 5s ...

... was: 20ms x  50 = 1000ms = 1s
    new: 20ms x 250 = 5000ms = 5s

src/datIf.cpp

@@ -164,7 +164,7 @@ char T_datif::datif_cycleSend()
 
     // supervise if DC data are valid
     datif_noResponseCtr++;         // inc every 20ms
-    if (datif_noResponseCtr>50)   // no life sign from device controller (DC) for about a sec
+    if (datif_noResponseCtr>250)   // no life sign from device controller (DC) for about 20ms x 250 = 5000ms = 5s
      {
         epi_resetDcDataValid(3);    // DC data has not updated for >=5s -> no longer valid!
         datif_nowNewDyns=0;