Lightware DA2DVI-Pro, User Manual

Page: 30 / 43

Page 30 / 43
4.9. DA2DVI-Pro initiated commands
4.9.1. EDID status changed
Description: This is sent after all commands that change the EDID (EDID copy,
EDID switch), or after a new EDID source ie. a new display device has been
connected to the DA2DVI-Pro.
Format:
←
(E_S_C) CrLf
Example:
After routing EDID to the input.
→
{1:101}
←
(E_SW_OK)CrLf
←
(E_S_C) CrLf
Info: DA2DVI-Pro stores the last attached display device’s EDID connected to DVI
OUTPUT 1. After disconnecting this device, its EDID will still be present in the
DA2DVI-Pro’s memory, therefore no status change message is issued by the
DA2DVI-Pro if a display device having the same EDID is connected to that output.
(The same display device is connected again, or another display device (same
brand) from the the same manufacturer)
Info: To keep your application in sync with the DA2DVI-Pro, it is recommended to issue
a show validity ( {wv} )
→
after receiveing EDID status changed response, and
read all locations indicating ’3’ in the table, as the EDID changes triggered the
‘EDID status changed’ response.
4.9.2. Port status changed
Description: If I/O port STATUS_TABLE has changed, the DA2DVI-Pro will send
this sequence to notify the controller software. This event is useful to trigger the
new {:ISD} and {:OSD} commands.
Format:
←
(PSC)CrLf
4.9.3. Error responses
Invalid input number
Description: Given input number exceeds the maximum number of inputs or
equals zero.
Format:
←
(ERR01)CrLf
Invalid output number
Description: Given output number exceeds the installed number of outputs or
equals zero.
Format:
←
(ERR02)CrLf
Invalid value
Description: Given value exceeds the maximum allowed value that can be sent.
Format:
←
(ERR03)CrLf