Additel ADT681 - Appendix I: Communication Protocols; PC Machine Send Format; ADT681 Return Format; Error Information Codes

Appendix I: Communication protocols
1. Instructions format
1.1 PC machine's send format
A X Knnnn: C0 C1 C2 C3 C4+ Eos (End of symbol)：： ：：：：
A 1 byte, the communication address of ADT681：
X 1 byte, only for W (write) or R (read)：
K 1 byte, M (for measure operation), F (for file operation), O (other operation)：
nnnn 2-5 bytes, the item operated by K instruction：
C0:C1:C2:C3:C4 Parameter, refer the specified instruction introduction：
Eos 0x0(Hex)：
1.2 Return format of the ADT681
A X Knnnn C0 C1 C2 C3 C4+Eos hereinto：： ：：：：： ， ：
：A Communication address of the ADT681
X E or F, E: error information of this frame data F: feedback information.：.
Knnnn It is same as the instructions from upper machine：
C0 C1 Feedback data or error information or ok，，，，：C2 C3 C4
Eos 0x0(Hex)：
1.3 Error information code instruction
1000: Receive the overflow from buffer zone.
1001: The user cannot perform this task
1004: Irregular code has been entered
1005: The pressure unit is unavailable
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