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DRAGON™ D151
PARAM_SEND
Description: Change particular parameter values
Packet Format
Length
Opcode
0XC6
Field Descriptions
Field Name
Length
Length of message (not
including checksum).
Opcode
0XC6
Message
4 = Host
Source
Status
Bit 0: Retransmit
Bit 1, 2: Unused
Bit 3: Change Type
Bit 4-7: Unused
Beep Code
Param Data
See
Format Table
Parameter Data Values
Table.
Checksum
2's complement sum of
message contents
excluding checksum.
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.
68
Message
Status
Source
Format
Parameter Data
and
Beep Code
Size
1 Byte
Length Field
1 Byte
Identifies this opcode type.
Identifies where the message
1 Byte
is coming from.
Bit 0: 1 indicates a retransmit
Bit 3: 1 Permanent change
1 Byte
0 Temporary change – lost
when power removed.
Unused bits must be set to 0.
set this field to 0xFF.
The parameter numbers and
data to be sent to the
requester.
2 Byte
Checksum of message.
Param
Checksum
Data
Description
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