Merge pull request #189 from sunspec/development

#187 - Model 715; Fixed incorrect model length

Author: bobfox

json/model_715.json

@@ -18,7 +18,7 @@
                 "mandatory": "M",
                 "name": "L",
                 "type": "uint16",
-                "value": 5
+                "value": 7
             },
             {
                 "comments": [