Sony FWD-32LX1 Protocol Manual page 6

(c) Answer (Display Response to Host)
1 Answer at the time of Control request
No. Item Value
1 Header 0x70: Answer
*
2 Answer 0x00: Completed (Normal completion)
0x01: Limit Over
(Abnormal completion: Over upper limit)
0x02: Limit Under
(Abnormal completion: Under lower limit)
0x03: Command Canceled
(Abnormal completion)
3 Check Sum 0xXX
* 0x00: Completed
Packet is correctly received and process is
also correctly completed.
0x01: Limit Over Packet is correctly received, but the data
value is over the upper limit.
0x02: Limit Under Packet is correctly received, but the data
value is under the lower limit.
0x03: Command Canceled Packet is correctly received, but the data
value is not correct or the request cannot be
accepted in the current host state.
* Check Sum:
If the value of a sum total of 1 and 2 exceeds
255 (1 byte), the data of 1 lower byte is
effective.
2 Answer at the time of Enquiry request
(Normal completion)
No. 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 Completed packet is correctly received and process is
also correctly completed.
* Return Data returns the read value.
* Check Sum: If the value of a sum total of 1 to X exceeds 255 (1 byte), the
data of 1 lower byte is effective.
3 Answer at the time of Enquiry request
(Abnormal completion)
No. Item Value
1 Header 0x70: Answer
2 Answer 0x03: Command Canceled
(Abnormal completion)
3 Check Sum 0xXX
* 0x03: Command Canceled Packet is correctly received, but the data
value is not correct or the request cannot be
accepted in the current host state.
* Check Sum:
If the value of a sum total of 1 to 2 exceeds
255 (1 byte), the data of 1 lower byte is
effective.
2
4 Error Answer
No. Item Value
1 Header 0xE0:Answer
*
2 Answer 0x00: No Function Error
0x01: Check Sum Error
0x02: Data Length Error
3 Check Sum 0xXX
* 0x00: No Function Error Packet header, category and function code are
not included in this protocol.
0x01: Check Sum Error Check sum value of received packet is not
correct.
0x02: Data Length Error Packet is correctly received, but the data size is
over the upper limit.
FWD-42LX1
FWD-32LX1