diff --git a/doc/development/JSON-API _Commands_Overview.md b/doc/development/JSON-API _Commands_Overview.md
index bb96189b..d3666b97 100644
--- a/doc/development/JSON-API _Commands_Overview.md	
+++ b/doc/development/JSON-API _Commands_Overview.md	
@@ -67,8 +67,7 @@ _http/s Support_
 | leddevice      | getProperties           | Yes           | Yes              | Yes            |
 | leddevice      | identify                | Yes           | Yes              | Yes            |
 | logging        | start                   | Yes           | No               | Yes            |
-| logging        | stop                    | Yes           | Yes              | Yes            |
-| logging        | update                  | Yes           | Yes              | Yes            |
+| logging        | stop                    | Yes           | No               | Yes            |
 | processing     | -                       | Yes           | Yes              | Yes            |
 | serverinfo     | -                       | Yes           | Yes              | Yes            |
 | serverinfo     | getInfo                 | Yes           | Yes              | Yes            |
diff --git a/include/api/JsonApiCommand.h b/include/api/JsonApiCommand.h
index e7abe96e..ace11c87 100644
--- a/include/api/JsonApiCommand.h
+++ b/include/api/JsonApiCommand.h
@@ -119,8 +119,7 @@ public:
 		ToggleIdle,
 		ToggleSuspend,
 		TokenRequired,
-		Unsubscribe,
-		Update
+		Unsubscribe
 	};
 
 	static QString toString(Type type) {
@@ -171,7 +170,6 @@ public:
 		case ToggleSuspend: return "toggleSuspend";
 		case TokenRequired: return "tokenRequired";
 		case Unsubscribe: return "unsubscribe";
-		case Update: return "update";
 		default: return "unknown";
 		}
 	}
@@ -301,8 +299,7 @@ public:
 			{ {"leddevice", "getProperties"}, { Command::LedDevice, SubCommand::GetProperties, Authorization::Yes, InstanceCmd::Yes, NoListenerCmd::Yes} },
 			{ {"leddevice", "identify"}, { Command::LedDevice, SubCommand::Identify, Authorization::Yes, InstanceCmd::Yes, NoListenerCmd::Yes} },
 			{ {"logging", "start"}, { Command::Logging, SubCommand::Start, Authorization::Yes, InstanceCmd::No, NoListenerCmd::Yes} },
-			{ {"logging", "stop"}, { Command::Logging, SubCommand::Stop, Authorization::Yes, InstanceCmd::Yes, NoListenerCmd::Yes} },
-			{ {"logging", "update"}, { Command::Logging, SubCommand::Update, Authorization::Yes, InstanceCmd::Yes, NoListenerCmd::Yes} },
+			{ {"logging", "stop"}, { Command::Logging, SubCommand::Stop, Authorization::Yes, InstanceCmd::No, NoListenerCmd::Yes} },
 			{ {"processing", ""}, { Command::Processing, SubCommand::Empty, Authorization::Yes, InstanceCmd::Yes, NoListenerCmd::Yes} },
 			{ {"serverinfo", ""}, { Command::ServerInfo, SubCommand::Empty, Authorization::Yes, InstanceCmd::Yes, NoListenerCmd::Yes} },
 			{ {"serverinfo", "getInfo"}, { Command::ServerInfo, SubCommand::GetInfo, Authorization::Yes, InstanceCmd::Yes, NoListenerCmd::Yes} },
diff --git a/libsrc/api/JSONRPC_schema/schema-adjustment.json b/libsrc/api/JSONRPC_schema/schema-adjustment.json
index 454b940f..ae5c1ecc 100644
--- a/libsrc/api/JSONRPC_schema/schema-adjustment.json
+++ b/libsrc/api/JSONRPC_schema/schema-adjustment.json
@@ -8,7 +8,9 @@
 			"enum" : ["adjustment"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-clear.json b/libsrc/api/JSONRPC_schema/schema-clear.json
index 467b32aa..a0c2e23c 100644
--- a/libsrc/api/JSONRPC_schema/schema-clear.json
+++ b/libsrc/api/JSONRPC_schema/schema-clear.json
@@ -8,7 +8,9 @@
 			"enum" : ["clear"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-clearall.json b/libsrc/api/JSONRPC_schema/schema-clearall.json
index 1af31f29..391dca4d 100644
--- a/libsrc/api/JSONRPC_schema/schema-clearall.json
+++ b/libsrc/api/JSONRPC_schema/schema-clearall.json
@@ -8,7 +8,9 @@
 			"enum" : ["clearall"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-color.json b/libsrc/api/JSONRPC_schema/schema-color.json
index 6d22b8c6..ff424674 100644
--- a/libsrc/api/JSONRPC_schema/schema-color.json
+++ b/libsrc/api/JSONRPC_schema/schema-color.json
@@ -8,7 +8,9 @@
 			"enum" : ["color"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-componentstate.json b/libsrc/api/JSONRPC_schema/schema-componentstate.json
index 4a413928..96edbac1 100644
--- a/libsrc/api/JSONRPC_schema/schema-componentstate.json
+++ b/libsrc/api/JSONRPC_schema/schema-componentstate.json
@@ -10,7 +10,9 @@
 			"enum" : ["componentstate"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-config.json b/libsrc/api/JSONRPC_schema/schema-config.json
index 352494b7..204661cf 100644
--- a/libsrc/api/JSONRPC_schema/schema-config.json
+++ b/libsrc/api/JSONRPC_schema/schema-config.json
@@ -13,7 +13,9 @@
 			"enum" : ["getconfig","getschema","setconfig","restoreconfig","reload"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-create-effect.json b/libsrc/api/JSONRPC_schema/schema-create-effect.json
index ac1c0137..2eceb9a1 100644
--- a/libsrc/api/JSONRPC_schema/schema-create-effect.json
+++ b/libsrc/api/JSONRPC_schema/schema-create-effect.json
@@ -8,7 +8,9 @@
 			"enum" : ["create-effect"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-delete-effect.json b/libsrc/api/JSONRPC_schema/schema-delete-effect.json
index 23dca48d..bdbdee7c 100644
--- a/libsrc/api/JSONRPC_schema/schema-delete-effect.json
+++ b/libsrc/api/JSONRPC_schema/schema-delete-effect.json
@@ -9,7 +9,9 @@
 			"enum" : ["delete-effect"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-effect.json b/libsrc/api/JSONRPC_schema/schema-effect.json
index 1c0220bd..6a66ad6c 100644
--- a/libsrc/api/JSONRPC_schema/schema-effect.json
+++ b/libsrc/api/JSONRPC_schema/schema-effect.json
@@ -8,7 +8,9 @@
 			"enum" : ["effect"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-image.json b/libsrc/api/JSONRPC_schema/schema-image.json
index 1bfae475..12c39697 100644
--- a/libsrc/api/JSONRPC_schema/schema-image.json
+++ b/libsrc/api/JSONRPC_schema/schema-image.json
@@ -8,7 +8,9 @@
 			"enum" : ["image"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-ledcolors.json b/libsrc/api/JSONRPC_schema/schema-ledcolors.json
index 85d287c2..086914ec 100644
--- a/libsrc/api/JSONRPC_schema/schema-ledcolors.json
+++ b/libsrc/api/JSONRPC_schema/schema-ledcolors.json
@@ -8,7 +8,9 @@
 			"enum" : ["ledcolors"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-logging.json b/libsrc/api/JSONRPC_schema/schema-logging.json
index aacfa349..d9bd7cf7 100644
--- a/libsrc/api/JSONRPC_schema/schema-logging.json
+++ b/libsrc/api/JSONRPC_schema/schema-logging.json
@@ -7,9 +7,6 @@
 			"required" : true,
 			"enum" : ["logging"]
 		},
-		"instance" : {
-			"type" : "integer"
-		},
 		"tan" : {
 			"type" : "integer"
 		},
diff --git a/libsrc/api/JSONRPC_schema/schema-processing.json b/libsrc/api/JSONRPC_schema/schema-processing.json
index bdb1db4c..6681d3b1 100644
--- a/libsrc/api/JSONRPC_schema/schema-processing.json
+++ b/libsrc/api/JSONRPC_schema/schema-processing.json
@@ -8,7 +8,9 @@
 			"enum" : ["processing"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"tan" : {
 			"type" : "integer"
diff --git a/libsrc/api/JSONRPC_schema/schema-serverinfo.json b/libsrc/api/JSONRPC_schema/schema-serverinfo.json
index a58c85b7..74b41453 100644
--- a/libsrc/api/JSONRPC_schema/schema-serverinfo.json
+++ b/libsrc/api/JSONRPC_schema/schema-serverinfo.json
@@ -12,7 +12,9 @@
 		  "enum": ["getInfo", "subscribe", "unsubscribe", "getSubscriptions", "getSubscriptionCommands"]
 		},
 		"instance" : {
-			"type" : "integer"
+			"type" : "integer",
+			"minimum": 0,
+			"maximum": 255
 		},
 		"data": {
 		  "type": ["null", "array"],
diff --git a/libsrc/api/JsonAPI.cpp b/libsrc/api/JsonAPI.cpp
index fd589d38..c86481f6 100644
--- a/libsrc/api/JsonAPI.cpp
+++ b/libsrc/api/JsonAPI.cpp
@@ -233,7 +233,9 @@ void JsonAPI::handleMessage(const QString &messageString, const QString &httpAut
 		const quint8 instance = static_cast<quint8>(message.value("instance").toInt());
 		if (!setHyperionInstance(instance))
 		{
+			cmd.isInstanceCmd = InstanceCmd::No;
 			sendErrorReply(QString("Invalid or stopped instance: %1").arg(instance), cmd);
+			return;
 		}
 	}