Cino FA470 - Manual (Page 14)

Command Overview
1-7
Commands with compound parameters
The Communication, Interface, Operation, Transmission, Symbology and Device Info
commands belong to this group. For better understanding of the command format, we divide
these commands into three types: Set, Get and Reply
1) Set
Set commands are used to configure the device setting. The parameter field can handle
multiple parameters request at same time. It means you are able to change multiple
setting of device at same as well. It is very useful for programmer to make fast initialization
on the device.
Each parameter is composed of “PID”, “Size” and “Option”. If necessary, you are able to
pack the selected parameters into one parameter field in accordance with the format
described in the following table.
Parameter(s)
First Parameter … Last Parameter
PID Size Option … PID Size Option
2 Bytes 2 Byte Variable … 2 Bytes 2 Byte Variable
Size Descriptions
PID 2 Byte Parameter ID
Size 2 Bytes Total bytes of the “Option” section
Formatted as High Byte Low Byte.
Length = Low Byte + High Byte x 256
If Parameter(s) = null, Length = 00h, 00h.Operation code
to identifies each command
Options Variable Parameter setting
Upon the receipt of a Set command, the scanner will response a Device ACK or Device
NAK message to indicate whether the new settings has been performed successfully or
not. If the host did not receive any response from the device within the user preset
time-out duration, please resend the command.