User Manual

Byte Stream Protocol with MR 100 MR 100 User Manual Page: 9
MR 100 User Manual
For every request sent to the reader there may be one / more response packets that the reader sends back to the host.
A Typical Response Packet has been described in the following table:
Field Number of Bytes
(Size)
Value Description
SOF 1 0x01 Described in Request Packet description.
Node Address 1 0~0x1F Described in Request Packet description.
Packet Length 1 See Description Described in Request Packet description.
Command
Mirror
1 See Description Mirror of the original command in the response packet.
Status 1 See Description The result or status of a command execution. See Status
Field Description section for more details.
Data Variable See Description In a typical response packet the size of data field may
vary from 0 – to 250 bytes. The first byte of response data
usually contains the error code if error bit of status field
has been set. For more information on error bit see Status
Field Description section. For more information on error
codes see Error Codes Described section.
CRC 2
(1 for LSB & 1 for
MSB)
Dependent Bitwise inversion of the 16-bit CCITT-CRC of the packet
excluding SOF, with the LSB (Least Significant Byte) first.
For more information on the Byte Stream Protocol section of the Matrics API Programmers Manual.