diff --git a/CMS_CORE_Library/S7Net/Nc_S7Net.cs b/CMS_CORE_Library/S7Net/Nc_S7Net.cs
index c65eb04..365a31c 100644
--- a/CMS_CORE_Library/S7Net/Nc_S7Net.cs
+++ b/CMS_CORE_Library/S7Net/Nc_S7Net.cs
@@ -3029,7 +3029,8 @@ namespace CMS_CORE_Library.S7Net
             // update only given data...
             foreach (var item in newData)
             {
-                newMem[item.Key - 1] = (byte)item.Value;
+                // algoritmo: valore = (val + 1) % 8, ovvero riflettore 0, 8, 16 --> 1, riflettore 1, 9, 17 --> 2
+                newMem[item.Key - 1] = (byte)((item.Value + 1) % 8);
             }
             // return as list...
             currMem = newMem.ToList();