Add @only_when_on and @fault_on_error to OPC-UA commands

PCC/PCC/PCC.py

@@ -789,6 +789,8 @@ class PCC(Device):
 
     @command()
     @DebugIt()
+    @only_when_on
+    @fault_on_error
     def RCU_off(self):
         """
 
@@ -798,6 +800,8 @@ class PCC(Device):
 
     @command()
     @DebugIt()
+    @only_when_on
+    @fault_on_error
     def RCU_on(self):
         """
 
@@ -807,6 +811,8 @@ class PCC(Device):
 
     @command()
     @DebugIt()
+    @only_when_on
+    @fault_on_error
     def ADC_on(self):
         """
 
@@ -816,6 +822,8 @@ class PCC(Device):
 
     @command()
     @DebugIt()
+    @only_when_on
+    @fault_on_error
     def RCU_update(self):
         """