Global Scene control

按照文档所示，要关闭这个标志位只能通过off with Effect命令，这样的话我发了off命令是无法关闭灯的，因为场景标志位还在？

不會的，场景标志也是命令，就是在收到的當下執行，你後來送出的off命令會覆蓋掉之前的场景标志

The GlobalSceneControl attribute is set to FALSE after reception of a Off with effect command.

还有上面的描述，如何防止2次on 2次off对系统的影响，请YK帮忙解答一下疑惑。

In order to support the use case where the user gets back the last setting of the devices (e.g. level settings for lamps),

a global scene is introduced which is stored when the devices are turned off and recalled when the devices are turned

on.

The global scene is defined as the scene that is stored with group identifier 0 and scene identifier 0.

The GlobalSceneControl attribute is defined in order to prevent a second off command storing the all-devices-off

situation as a global scene, and to prevent a second on command destroying the current settings by going back to the

global scene.

The GlobalSceneControl attribute SHALL be set to TRUE after the reception of a command which causes the OnOff

attribute to be set to TRUE, such as a standard On command, a Move to level (with on/off) command, a Recall scene

command or a On with recall global scene command (see Section 3.8.2.3.5).

The GlobalSceneControl attribute is set to FALSE after reception of a Off with effect command