Disable OVC during ramping and apply initial scale/angle.

Allowing the user to apply an initial scale/angle avoids problems of ramping with a totally off scale/angle that might results from a failed previous ramping attempt.

src/Automation.cc

@@ -308,13 +308,10 @@ void Automation::Main::rampUp() {
 
   // diable OVC
   bool ovcEnabled = _ovc.enable;
-  _ovc.enable = false;
-  _ovc.enable.write();
+  _ovc.enable.writeIfDifferent(false);
 
-  _controller.output.calibration.scale = (double)_my.rampup.initialScale;
-  _controller.output.calibration.scale.write();
-  _controller.output.calibration.angle = (double)_my.rampup.initialAngle;
-  _controller.output.calibration.angle.write();
+  _controller.output.calibration.scale.setAndWrite(_my.rampup.initialScale);
+  _controller.output.calibration.angle.setAndWrite(_my.rampup.initialAngle);
 
   // prepare use of automated OVC
   _controller.output.calibration.cascadeInput.enable = true;
@@ -504,8 +501,7 @@ void Automation::Main::rampUp() {
   // enable OVC
   if(ovcEnabled) {
     _ovc.store.write();
-    _ovc.enable = true;
-    _ovc.enable.write();
+    _ovc.enable.writeIfDifferent(true);
   }
 
   // rampup finished