Describe n:1 mapping between object tree (states) and polling interval list items

[git-kick]

Not every Tag displayed in the object tree is also listed in the polling interval settings, because there is not always a 1:1 mapping. E.g. the response for REQ_GET_POWER_SETTINGS may contain multiple values RES_POWER_LIMITS_USED, RES_MAX_CHARGE_POWER, RES_MAX_DISCHARGE_POWER, RES_DISCHARGE_START_POWER, RES_POWERSAVE_ENABLED, RES_WEATHER_REGULATED_CHARGE_ENABLED

I.e. REQ_GET_POWER_SETTINGS is listed only in the polling intervals, but the RES_... Tags are only in the object tree.

User documentation should contain a clear description of the mapping in order to enable straight forward fine tuning of the polling intervals.

Source: https://forum.iobroker.net/topic/49217/test-adapter-e3dc-rscp-v0-0-x-github/299