Mindeo FS580 - Page 96

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Example 1: to set parameter Flow control to be None (see “4-3 RS232 interface” ).
Length
Opcode
Status
Parameter code
Data
type
Parameter
value
Checksum
0x0A
0x23
0xC0
0x30 0x33 0x30 0x31
0x44
0x30 0x30
0xFD 0xAB
Example 2: to set parameter Code ID setting of UPC-A to be U (0x55).
Length
Opcode
Status
Parameter code
Data type
Parameter
value
Checksum
0x0A
0x23
0xC0
0x31 0x31 0x30 0x34
0x48
0x35 0x35
0xFD 0x9B
Example 3: to set parameter Prefix string setting to be ABCD.
Length
Opcode
Status
Parameter code
Data type
Parameter value
Checksum
0x0D
0x23
0xC0
0x38 0x30 0x30 0x31
0x53
0x41 0x42 0x43 0x44 0x00
0xFC 0xEA
Host Requirements
The host transmits this message to change the scanner’s parameters. Please be sure that the Change
Type bit (bit 6 of the Status byte) in the Status field is set as desired.
Scanner Requirements
When the scanner receives a PARAM_SEND, it interprets and stores the parameters, then ACKs
the command (if ACK/NAK handshaking is enabled). These parameters are stored permanently
only if the Change Type (bit 6 of the Status byte) is set to 1. Frequent permanent changes are not
recommended due to the limited write-cycles of flash memory. If bit 6 is set to 0 the changes are
temporary, and are lost when the scanner is powered down.
If the scanner changes the parameter, it issues the requested beep sequence and stores the
requested parameter values.
Host Scanner
(1)
PARAM_SEND
(2)
Store parameters
and ACK
The scanner issues a PARAM_SEND in response to a PARAM_REQUEST from the host. It
responds to the PARAM_REQUEST message by sending all supported parameter values. No value
is sent for any unsupported parameter. If none of the requested values is supported, the scanner
responds to the host with NAK.
When the scanner sends PARAM_SEND message, the Change Type bit (bit 6 of Status byte) can
be ignored.