diff --git a/EXRAIL2.cpp b/EXRAIL2.cpp
index a8fc07de..93037d50 100644
--- a/EXRAIL2.cpp
+++ b/EXRAIL2.cpp
@@ -1001,11 +1001,11 @@ void RMFT2::loop2() {
           StringFormatter::send(LCCSerial,F("<L x%h>"),(uint16_t)operand);
        break; 
   
-  case OPCODE_MERGON:  // MERG adapter 
-  case OPCODE_MERGOFF: 
+  case OPCODE_ACON:  // MERG adapter 
+  case OPCODE_ACOF: 
       if ((compileFeatures & FEATURE_LCC) && LCCSerial) 
           StringFormatter::send(LCCSerial,F("<L x%c%h>"),
-          opcode==OPCODE_MERGON?'1':'0',(uint16_t)operand);
+          opcode==OPCODE_ACON?'1':'0',(uint16_t)operand);
        break; 
 
   case OPCODE_LCCX: // long form LCC
@@ -1095,8 +1095,8 @@ void RMFT2::loop2() {
   case OPCODE_PINTURNOUT: // Turnout definition ignored at runtime
   case OPCODE_ONCLOSE: // Turnout event catchers ignored here
   case OPCODE_ONLCC:   // LCC event catchers ignored here 
-  case OPCODE_ONMERGON:   // MERG event catchers ignored here 
-  case OPCODE_ONMERGOFF:   // MERG event catchers ignored here 
+  case OPCODE_ONACON:   // MERG event catchers ignored here 
+  case OPCODE_ONACOF:   // MERG event catchers ignored here 
   case OPCODE_ONTHROW:
   case OPCODE_ONACTIVATE: // Activate event catchers ignored here
   case OPCODE_ONDEACTIVATE:
diff --git a/EXRAIL2.h b/EXRAIL2.h
index ed3a3e85..9271bbad 100644
--- a/EXRAIL2.h
+++ b/EXRAIL2.h
@@ -69,8 +69,8 @@ enum OPCODE : byte {OPCODE_THROW,OPCODE_CLOSE,OPCODE_TOGGLE_TURNOUT,
              OPCODE_TTADDPOSITION,OPCODE_DCCTURNTABLE,OPCODE_EXTTTURNTABLE,
              OPCODE_ONROTATE,OPCODE_ROTATE,OPCODE_WAITFORTT,
              OPCODE_LCC,OPCODE_LCCX,OPCODE_ONLCC,
-             OPCODE_MERGON, OPCODE_MERGOFF, 
-             OPCODE_ONMERGON, OPCODE_ONMERGOFF, 
+             OPCODE_ACON, OPCODE_ACOF, 
+             OPCODE_ONACON, OPCODE_ONACOF, 
              OPCODE_ONOVERLOAD,
              OPCODE_ROUTE_ACTIVE,OPCODE_ROUTE_INACTIVE,OPCODE_ROUTE_HIDDEN,
              OPCODE_ROUTE_DISABLED,
diff --git a/EXRAIL2MacroReset.h b/EXRAIL2MacroReset.h
index 0b86c2e7..8927fbe2 100644
--- a/EXRAIL2MacroReset.h
+++ b/EXRAIL2MacroReset.h
@@ -99,10 +99,10 @@
 #undef LCCX 
 #undef LCN 
 #undef MOVETT
-#undef MERGON
-#undef MERGOFF
-#undef ONMERGON
-#undef ONMERGOFF
+#undef ACON
+#undef ACOF
+#undef ONACON
+#undef ONACOF
 #undef MESSAGE
 #undef ONACTIVATE
 #undef ONACTIVATEL
@@ -269,10 +269,10 @@
 #define LCN(msg) 
 #define MESSAGE(msg)
 #define MOVETT(id,steps,activity)
-#define MERGON(eventid)
-#define MERGOFF(eventid)
-#define ONMERGON(eventid)
-#define ONMERGOFF(eventid)
+#define ACON(eventid)
+#define ACOF(eventid)
+#define ONACON(eventid)
+#define ONACOF(eventid)
 #define ONACTIVATE(addr,subaddr)
 #define ONACTIVATEL(linear)
 #define ONAMBER(signal_id) 
diff --git a/EXRAIL2Parser.cpp b/EXRAIL2Parser.cpp
index b64ee933..25ea32c5 100644
--- a/EXRAIL2Parser.cpp
+++ b/EXRAIL2Parser.cpp
@@ -78,8 +78,8 @@ void RMFT2::ComandFilter(Print * stream, byte & opcode, byte & paramCount, int16
                  getOperand(progCounter,0)
                  );        
         }
-        if (opcode==OPCODE_MERGON)  StringFormatter::send(stream,F("<LS x1%h>\n"),getOperand(progCounter,0));   
-        if (opcode==OPCODE_MERGOFF)  StringFormatter::send(stream,F("<LS x0%h>\n"),getOperand(progCounter,0));   
+        if (opcode==OPCODE_ACON)  StringFormatter::send(stream,F("<LS x1%h>\n"),getOperand(progCounter,0));   
+        if (opcode==OPCODE_ACOF)  StringFormatter::send(stream,F("<LS x0%h>\n"),getOperand(progCounter,0));   
       }
       
       // we stream the hex events we wish to listen to
@@ -101,11 +101,11 @@ void RMFT2::ComandFilter(Print * stream, byte & opcode, byte & paramCount, int16
                  );   
            eventIndex++;      
         }
-        if (opcode==OPCODE_ONMERGON || opcode==OPCODE_ONMERGOFF) {
+        if (opcode==OPCODE_ONACON || opcode==OPCODE_ONACOF) {
            onLCCLookup[eventIndex]=progCounter; // TODO skip...
            StringFormatter::send(stream,F("<LL %d x%c%h>\n"),
                  eventIndex,
-                 opcode==OPCODE_ONMERGON?'1':'0',
+                 opcode==OPCODE_ONACON?'1':'0',
                  getOperand(progCounter,0)
                  );   
            eventIndex++;      
diff --git a/EXRAILMacros.h b/EXRAILMacros.h
index e5b93fa8..34e9ec7a 100644
--- a/EXRAILMacros.h
+++ b/EXRAILMacros.h
@@ -189,10 +189,14 @@ bool exrailHalSetup() {
 #define LCCX(senderid,eventid) | FEATURE_LCC 
 #undef ONLCC
 #define ONLCC(senderid,eventid) | FEATURE_LCC
-#undef ONMERGON
-#define ONMERGON(eventid) | FEATURE_LCC
-#undef ONMERGOFF
-#define ONMERGOFF(eventid) | FEATURE_LCC
+#undef ACON
+#define ACON(eventid) | FEATURE_LCC
+#undef ACOF
+#define ACOF(eventid) | FEATURE_LCC
+#undef ONACON
+#define ONACON(eventid) | FEATURE_LCC
+#undef ONACOF
+#define ONACOF(eventid) | FEATURE_LCC
 #undef ROUTE_ACTIVE
 #define ROUTE_ACTIVE(id) | FEATURE_ROUTESTATE
 #undef ROUTE_INACTIVE
@@ -437,10 +441,10 @@ const  HIGHFLASH  int16_t RMFT2::SignalDefinitions[] = {
 #include "EXRAIL2MacroReset.h"
 #undef ONLCC
 #define ONLCC(sender,event) +1 
-#undef ONMERGON
-#define ONMERGON(event) +1 
-#undef ONMERGOFF
-#define ONMERGOFF(event) +1 
+#undef ONACON
+#define ONACON(event) +1 
+#undef ONACOF
+#define ONACOF(event) +1 
 
 const int RMFT2::countLCCLookup=0
 #include "myAutomation.h"
@@ -537,10 +541,10 @@ int RMFT2::onLCCLookup[RMFT2::countLCCLookup];
         OPCODE_PAD,V((((uint64_t)sender)>>32)&0xFFFF),\
         OPCODE_PAD,V((((uint64_t)sender)>>16)&0xFFFF),\
         OPCODE_PAD,V((((uint64_t)sender)>>0)&0xFFFF),  
-#define MERGON(eventid) OPCODE_MERGON,V(eventid),
-#define MERGOFF(eventid) OPCODE_MERGOFF,V(eventid),
-#define ONMERGON(eventid) OPCODE_ONMERGON,V(eventid),
-#define ONMERGOFF(eventid) OPCODE_ONMERGOFF,V(eventid),
+#define ACON(eventid) OPCODE_ACON,V(eventid),
+#define ACOF(eventid) OPCODE_ACOF,V(eventid),
+#define ONACON(eventid) OPCODE_ONACON,V(eventid),
+#define ONACOF(eventid) OPCODE_ONACOF,V(eventid),
 #define LCD(id,msg) PRINT(msg)
 #define SCREEN(display,id,msg) PRINT(msg)
 #define STEALTH(code...) PRINT(dummy)