diff --git a/utils/matiec_src/lib/C/iec_std_FB.h b/utils/matiec_src/lib/C/iec_std_FB.h
index b4416d2..d6d9614 100644
--- a/utils/matiec_src/lib/C/iec_std_FB.h
+++ b/utils/matiec_src/lib/C/iec_std_FB.h
@@ -613,8 +613,8 @@ static void F_TRIG_body__(F_TRIG *data__) {
   }
   // Initialise TEMP variables
 
-  __SET_VAR(data__->,Q,,(!(__GET_VAR(data__->CLK,)) && !(__GET_VAR(data__->M,))));
-  __SET_VAR(data__->,M,,!(__GET_VAR(data__->CLK,)));
+  __SET_VAR(data__->,Q,,(!(__GET_VAR(data__->CLK,)) && (__GET_VAR(data__->M,))));
+  __SET_VAR(data__->,M,,__GET_VAR(data__->CLK,));
 
   goto __end;
 
diff --git a/utils/matiec_src/lib/edge_detection.txt b/utils/matiec_src/lib/edge_detection.txt
index 69c0dfe..a7ad4d6 100755
--- a/utils/matiec_src/lib/edge_detection.txt
+++ b/utils/matiec_src/lib/edge_detection.txt
@@ -29,7 +29,7 @@ FUNCTION_BLOCK F_TRIG
      VAR_INPUT  CLK: BOOL; END_VAR
      VAR_OUTPUT   Q: BOOL; END_VAR
      VAR RETAIN M: BOOL; END_VAR
-Q := NOT CLK AND NOT M;
-M := NOT CLK;
+Q := NOT CLK AND M;
+M := CLK;
 END_FUNCTION_BLOCK