Sagem MORPHOACCESS 200 - Communication Protocol

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The communication protocol available allows the terminal to send
commands to a host through the communication COM1/COM2 ports.
All the commands will be formatted with an "Identifier Length Value"
structure as described below:
Identifier Length Value
Identifier called I This is the identifier of the command.
Length called L This is the length of the Value field in bytes.
Value called V The parameters or data.
The commands will be encapsulated in a packet structure described on
the next figure.
STX ID RC ILV
CRC
DLE ETX
CRC: compliance CRC16 V41
Fields name Definition Value
<STX> Start Text 0x02
<ID> Packet Identifier 0xE1
<RC> Request Counter [0 255]
<ILV> Identifier Length Data (DLE data
bytes are stuffed)
<CRC> Transmission error control Depends on the frame
<DLE> 0x1B
<ETX> End Text 0x03
For more information, refer to document MorphoAccess Host System
Interface Specifications.
SK-0000011145-05 SAGEM Défense Sécurité document. Reproduction and disclosure forbidden.
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