Cino FA470 - Manual (Page 247)

Command Descriptions
2-232
Host NAK Extension
(WF)
Descriptions
Host acknowledgement
Host NAK Extension is an extension of Host NAK which added a user defined message.
Available for F & L series
Packet Format
Prefix Opcode Status Length Parameter(s) LRC Suffix
7Eh 90h 10h 01h 00h 02h 00h See Next Page Variable 7Eh
1 Byte 3 Bytes 1 Byte 2 Bytes 512 Bytes 1 Byte 1 Byte
. Host Requirements
There is no response for this message.
. Length
Total size (bytes) of the Parameter(s) field
. LRC
”Opcode” XOR “Status” XOR “Length” XOR “Parameter(s)”