AH500 Module Manual Type 3: Sending an abbreviated record, and receiving a full record Sending an abbreviated record: The packet which will be sent is the same as TX packet 1 in type 1 or TX packet 1 in type 2. The function field is 16#89. Receiving a full record: 『 Start bit 』 + 『 Length 』 + 『 Length (repeat) 』 + 『 Start bit (repeat) 』 + 『 Instrument (IA) 』 + 『 Function field (FF) 』 + 『 Parameter index (PI) 』 + 『 Data block (DB) 』 + 『 Checksum (CS) 』 + 『 End mark 』 16#68+(Null)+(Null)+16#68+D0+(Null)+D100 Start bit: 16#68 Length+Length (repeat): 2 bytes are ignored. Users can ignore the length or store the length. 8-54