Original Internet address of this content: https://www.ag85.site/protocols/numericspaceprotocolag85nsp1.htm
1. Maximum available value of byte is sign that a value is not set;
2. (Maximum - 1 of available values of byte) value of byte is sign that sequence ended;
3. (Maximum - 2 of available values of byte) value of byte is sign of fractional number;
4. (Maximum - 3 of available values of byte) value of byte is sign that a value is greater than maximum value of values of byte which are not signs;
5. Optionally (maximum - 4 of available values of byte) value of byte is sign of either system or program/application/task defined sign.
6. It is allowed to define either system or program/application/task signs.