diff --git a/IOB-WIN/IobFanuc.cs b/IOB-WIN/IobFanuc.cs
index 8ce54042..88d37b4c 100644
--- a/IOB-WIN/IobFanuc.cs
+++ b/IOB-WIN/IobFanuc.cs
@@ -10,6 +10,9 @@ namespace IOB_WIN
 {
   public class IobFanuc : IobGeneric
   {
+
+    protected byte[] MemBlockF = new byte[2];
+    protected byte[] MemBlockF_pre = new byte[2];
     /// <summary>
     /// wrapper chiamata lettura/scrittura SINGOLO BYTE...
     /// </summary>
@@ -189,8 +192,7 @@ namespace IOB_WIN
       {
         if (verboseLog) lg.Info("START FanucMemRW-FG");
         // !!!FARE!!! ora leggo CABLATO i byte F e G...
-        byte[] MemBlockF = new byte[2];
-        byte[] MemBlockG = new byte[2];
+        //byte[] MemBlockG = new byte[2];
         inizio = DateTime.Now;
         FanucMemRW(R, FANUC.MemType.F, 0, ref MemBlockF);
         if (utils.CRB("recTime")) TimingData.addResult(string.Format("R{0}-F", MemBlockF.Length), DateTime.Now.Subtract(inizio).Ticks);
@@ -198,7 +200,13 @@ namespace IOB_WIN
         //FanucMemRW(R, FANUC.MemType.G, 7, ref MemBlockG);
         //if (utils.CRB("recTime")) TimingData.addResult(string.Format("R{0}-G", MemBlockG.Length), DateTime.Now.Subtract(inizio).Ticks);
         if (verboseLog) lg.Info("END FanucMemRW-FG");
+        // se cambiato loggo!
+        if (MemBlockF != MemBlockF_pre)
+        {
+          lg.Info(string.Format("Dati F: {0:X} | {1:X}", MemBlockF[0], MemBlockF[1]));
+        }
         if (nReadIN % 50 == 0) lg.Info(string.Format("Dati F: {0:X} | {1:X}", MemBlockF[0], MemBlockF[1]));
+        MemBlockF_pre = MemBlockF;
         //if (nReadIN % 50 == 0) lg.Info(string.Format("Dati G: {0:X}", MemBlockG));
       }
     }