87
4-11 PARAM_SEND
Description: the command performs two optional operations:
1) The scanner respond to a PARAM_REQUEST.
2)The host demand scanner to change particular parameter values.
Packet Format
Length
Opcode
Status
Option code
Data
type
Parameter
value
…
Checksum
0x23
(‘#’)
Field Descriptions
Table 4-13 Field Descriptions
Field Name
Format
Size
Description
Length
Length of message (not
including checksum).
1 Byte
Length Field
Opcode
0x23
1 Byte
Identifies this opcode type.
Status
Bit 0: Retransmit
Bit 5-1: Query property of
the parameter
Bit 6: Change Type
Bit 7: Command source
1 Byte
Bit0：Identifies the transmission status.
Bit5-1：Property of the parameter
0，Max value
1，Min value
2，Permanent value
3，Temporary value
4，Default value
5-15，Reserve
Bit6：1，Permanently change
0，Temporarily change
Bit7:
1, Host sends, requesting scanner change
parameter.
0, scanner sends, replying
PARAM_REQUEST command.
Option Code
ASCII value of the option
code
4 Bytes 4 bytes for each option code
Data type
0x48/0x44/0x53
1 Byte
ASCII value of character‘H’，’D’ or‘S’
‘H’: Parameter value is in hexadecimal type, 2
bytes.
‘D’: Parameter value is in decimal type, 2
bytes.
‘S’: Parameter value is in character string type,
