Mindeo ES4200, Руководство пользователя

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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,