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**********************************************************************
For ACK
This returns ACK without adding data portion to the command that does
not request data.
This returns ACK with adding data to the data portion for the command
that requests data.
For NAK
This adds a cause of not accepting the command to data portion to
return it.
(Example) Power On
Command:
02H 00H FFH F0H 00H CKS
NAK:
A2H 00H 01H 20H 02H DATA01 DATA02 CKS
Data Contents
----------------------------------------------------------------------
DATA01 Error types
00H : Not supported
01H : Parameter error
02H : Operation mode error
03H : Gain-related error
04H : Logo transfer error
DATA02 Error description
* When not supported
00H : Unknown command
01H : The current model does not support this function.
02H : This model is not compatible with the Switcher.
03H : This model is not compatible with the PC Viewer.
* When a parameter error occurs
00H : Unvalid values specified.
01H : Specified terminal is unavailable or cannot be selected
02H : Selected language is not available.
* When an operation mode error occurs
00H : Available memory reservation error
01H : External control working
02H : Operating memory
03H : Standby
04H : On Forced on-screen mute mode
05H : Link mode working
06H : Displaying a signal other than PC Viewer
07H : -No signal-
08H : Displaying a test pattern or PC Card Files screen.
09H : No PC card is inserted-
0AH : Memory operation failed
0BH : Switcher mode working
0CH : Displaying the Entry List
* When a gain adjustment error occurs
00H : Group number / sub category number is not correct.
01H : Selected gain is not available.
02H : Adjustment failed
* When a logo transfer error occurs
00H : Start is not requested
01H : Cannot process due to storing
02H : Exceeds the total number of blocks required
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