Cino FA470 - Manual (Page 240)

Command Descriptions
2-225
2.10 Acknowledgement
Device ACK
(ALL)
Descriptions
Device acknowledgement
Device ACK message is used to guarantee the reliability of packet transfers for commands that
have no natural response, such as Action Commands, Set commands. Device ACK can not be
disabled.
Packet Format
Prefix Opcode Status Length Parameter(s) LRC Suffix
7Eh 0Fh 00h 00h 00h 00h 00h 0F 7Eh
1 Byte 3 Bytes 1 Byte 2 Bytes 0 Byte 1 Byte 1 Byte
. Host Requirements
Since Device ACK is a device-to-host message, there is no response for this message.
. Parameter(s) Field
Device ACK message takes no parameters, so the Parameter(s) field is null.
. Length
Total size (bytes) of the Parameter(s) field
. LRC
”Opcode” XOR “Status” XOR “Length” XOR “Parameter(s)”