Canon SX50 - REALiS SXGA+ LCOS Projector Command Reference Manual page 65

Response Responses are made in the formats below for each parameter.
<Parameter name>=<Type>, <Setting range>
Type
I
N
The definition of <Setting range> varies depending on the type.
1. When the type is I (ID)
<Setting range>:=<Setting option 1>, <Setting option 2>, <Setting option 3>,
2. When the type is N (Number)
<Setting range>:=<Setting 1 minimum value>, <Setting 1 maximum value>, <Setting 2 minimum value>,
Description This retrieves the setting range of each parameter.
(1) The parameter setting range can change depending on the projector state (input, display mode, etc.).
(2) Requesting the setting range before sending the setting/control command enables greater reliability.
(The setting/control command can be executed properly when the setting range has already been obtained.)
Example Reference
> RANGE POWER
< r:POWER=ON
> RANGE ASPECT
< r:ASPECT=I,FULL,NORMAL,WIDE,REAL
*Commands are indicated by ">", and responses are indicated by "<".
Meaning
ID
Number
<Setting option 4>, ..., <Setting option N>
<Setting 2 maximum value>, ..., <Setting N minimum value>, <Setting N maximum value>