Datalogic Dragon D151, Reference Manual

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DRAGON™ D151
68
PARAM_SEND
Description: Change particular parameter values
Packet Format
Length Opcode Message
Source
Status Beep Code Param
Data
Checksum
0XC6
Field Descriptions
Field Name Format Size Description
Length Length of message (not
including checksum).
1 Byte Length Field
Opcode 0XC6 1 Byte Identifies this opcode type.
Message
Source
4 = Host 1 Byte
Identifies where the message
is coming from.
Status
Bit 0: Retransmit
Bit 1, 2: Unused
Bit 3: Change Type
Bit 4-7: Unused
1 Byte
Bit 0: 1 indicates a retransmit
Bit 3: 1 Permanent change
0 Temporary change – lost
when power removed.
Unused bits must be set to 0.
Beep Code set this field to 0xFF.
Param Data See Parameter Data
Format Table and
Parameter Data Values
Table.
The parameter numbers and
data to be sent to the
requester.
Checksum 2's complement sum of
message contents
excluding checksum.
2 Byte Checksum of message.
This message is sent by the host to change the reader’s parameter values.
Parameter numbers 0xF0 (+256), 0xF1 (+512), 0xF2 (+768) are used to access
parameters whose numbers are 256 and higher. For example, to access the first
parameter in the 256-511 range, use 0xF0 and 0x00.