Differences

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--- transsecsscripts [2020/07/21 00:43] – wikiadmin
+++ transsecsscripts [2020/09/22 10:15] (current) – wikiadmin
@@ Line 11: / Line 11: @@
 For this example we have added a String VID called "ProcessStatus" to the ModbusPLCTool. We have added a Modbus 4X register to read an integer value from the PLC. We will convert the value read from the Modbus 4X register to a String and write this value to the ProcessStatus VID. This code is entered in the Modbus 4X register's script.
-<code>
+<code javascript>
 var TransSecsController = Java.type("com.ergotech.transsecs.secs.TransSecsController");
 var SecsFormat20 = Java.type("com.ergotech.secs.SecsFormat20");
 var SecsFormat54 = Java.type("com.ergotech.secs.SecsFormat54");
+status=incomingValue.getIntValue(); //the PLC register value
-//convert integer value to String and update the VID on a value change
+//convert integer value to a String and update the VID on a value change
 //values are 0=Uninitialized 1=Ready To Start 2=Running 3=Completed
-//if value is out of range, set status to "Undefined"
+//if value is out of range, set it to "Undefined"
 try {
-	status=incomingValue.getIntValue(); //the PLC register value
-	stringValue="Undefined";
 	switch (status) {
 	  case 0:
@@ Line 35: / Line 33: @@
 	  case 3:
 	    stringValue="Completed";
-	    break;
+      default:
-	}
+         stringValue="Undefined";
+  }
   tool=TransSecsController.findController("ModbusPLCTool");
   gh = tool.getGemHandler();
-  gh.setValue("ProcessStatus",new SecsFormat20(stringValue));
+  //get the current VID value and set this new value if this is a change
+  currentValue = gh.getValue("ProcessStatus").getStringValue();
+  //check that the value has changed before writing to the VID
+  if (!(currentValue.equals(stringValue))){
+    gh.setValue("ProcessStatus",new SecsFormat20(stringValue));
+  }
 } catch (e)  {
 	    print("Error converting register value to String");
-	    print(e.stack));
+	    print(e.stack);
 }
 </code>
+=== Additional Examples ===
+[[scriptingexamples|TansSECS and MIStudio JavaScript Examples]]
-more examples coming soon!
+[[devices|TransSECS Devices JavaScript Examples]]