Sony FWD-42PV manual Normal response

3.Communication Data Format (a)Control message

№	Item	Value
1	Header	0x8C: Control
2	Category	0xXX
3	Function	0xXX
4	Data1（Length）	0xXX
5	Data2（Data1）	0xXX
:	:	0xXX
:	:	0xXX
X	DataX	0xXX
X+1	Check Sum	0xXX

*Check Sum: The total from №1 to №X, when value exceeds 255, 1byte of data is confirmed the bottom.

*When sending controls in sequence, keep interval of more than 500ms between the commands.

*When sending an enquiry right after sending the control of a same command, also keep interval of more than 5 between the commands.

(b)Enquiry message

№	Item	Value
1	Header	0x83: Enquiry
2	Category	0xXX
3	Function	0xXX
4	Data1	0xFF
5	Data2	0xFF
6	Check Sum	0xXX

* Check Sum: The total from №1 to №5, when value exceeds 255, 1byte of data is confirmed the bottom.

(c)Answer message
(1)Control answer
№	Item	Value
1	Header	0x70: Answer
2	Answer*	0x00: Completed
		0x01: Limit Over
		0x02: Limit Under
		0x03: Command Canceled
3	Check Sum	0xXX
* 0x00: Completed		Normal response.
0x01: Limit Over		The packet was received normally, but the data value was over the upper limit.
		Forcedly the monitor adjusted the data to maximum value.
0x02: Limit Under		The packet was received normally, but the data value was under the lower limit.
		Forcedly the monitor adjusted the data to minimum value.
0x03: Command Canceled		The packet was received normally, but the command was cancelled because the
		function was not in adjustable mode, such as "--" a function displayed as in user

menu.

* Check Sum: The total from №1 to №2, when value exceeds 255, 1byte of data is confirmed the bottom.

(2)Enquiry answer (Complete)
№	Item	Value
1	Header	0x70: Answer
2	Answer	0x00: Completed
3	Return Data Size	0xXX
4	Return Data1	0xXX
:	:	0xXX
:	:	0xXX
X	Return DataX	0xXX
X+1	Check Sum	0xXX

* 0x00: Completed Normal response.

*Return Data returns the read value.

*Check Sum: The total from №1 to №X, when value exceeds 255, 1byte of data is confirmed the bottom.