Error Handling - InFocus LP540 Cli Manual

1.1.7 Error Handling

When the closing parenthesis is received, the command is validated
before it is processed. If the received command is determined to be
invalid, a question mark character will be returned as a error response.
Examples:
(123?)
request will return '?'
(VOL ?)
between the prefix and the
This read request will
Not all settings are readable. If an attempt is made to read from a write-
only setting, the projector will return a question mark.
Example:
(VOL?)
projector's volume
(BRT?)
projector's brightness
1.1.6.2 String Format: (S)
where
(
response
S
)
response
Examples:
(VER?)
"123" is not a valid CLI command prefix. This read
"VOL" is a valid CLI command prefix, but the spaces
question mark character invalidates the command.
return '?'.
Read the current range and value of the
Returns: (0-127,64)
Read the current range and value of the
Returns: (0-255,128)
open parenthesis marks the start of the CLI
character string
closing parenthesis marks the end of the CLI
Read the current software version
Returns: (v2.0)