Barco F(L)35 Command Reference Manual page 8

2. Communication protocol definitions
Mnemonic
Limitations 4 bytes
Inclusion Required
Example
POWR
Mnemonic bytes (4 bytes)
The mnemonic is a 4 byte ASCII command (key identifier). This is required in all serial communications.
Modifier byte (1–2 bytes)
The modifier is used to constrain or modify the mnemonic command.
Modifier Description
R Relative change. Given value will be relative to existing value. e.g. BRIG10 will increase brightness by 10 steps.
A
Not normally used. Manually request acknowledgement/read back the result of the command.
? Get current value
?M Get maximum value
?N Get minimum value
?D Get default value
?S Get default step value
Terminator
The terminator informs the projector (in case of transmission) or the computer (in case of reception) that the data transfer is complete
and that the interpretation of the command and data bytes can start.
Acknowledgement
If the command is understood by the projector then an 'ACK' command is sent back. The 'ACK' command uses the following protocol:
Ack.
Limitations 1 byte
Definition ASCII %
Example
%
Some commands could return a value that is more than 6 bytes, for example, strings. This is identified by the acknowledgement
including the alphanumeric value 'eXXXXX'.
Address functionality is no longer used. Address bytes will always be 001.
For example:
> :seri ?
> %001 SERI e00001 07010001
Invalid command
If the input command is not valid, then the projector acknowledgement may include an error message in the value field.
Ack.
Limitations 1 byte
Definition ASCII %
Example
%
Error code Error message
!00001 Access denied
4
Modifier
1 byte
Optional
A
Address
Separator
1–3 bytes 1 byte
Projector ASCII space
address
001 Space
Address Separator
1–3 bytes 1 byte
Projector ASCII space
address
001 Space
Description
User does not have sufficient access rights to perform this command.
Value
N bytes, max 6 bytes
Optional
1
Command Separator
4 bytes 1 byte
Mnemonic ASCII space
POWR Space
Command Separator
4 bytes 1 byte
Mnemonic ASCII space
POWR Space
601–0381–00 F(L)35, FS35 IR, F85 21/10/2015
Target
N bytes, max 4
Optional
CR
Value Terminator
6 bytes 1 byte
Numeric Carriage
value Return (Hex
0x0D)
000001 CR
Value Terminator
6 bytes 1 byte
Numeric Carriage
value of error
Return (Hex
0x0D)
!00001 CR