ACS ACR1281U-C8, Programming Manual

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ACR1281U-C8 – Application Programming Interface
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3.0. Reader Commands
3.1. ACR120_Open
Opens a port (connection) to the reader.
High Level API :
DLLAPI INT16 AC_DECL ACR120_Open(INT16 ReaderPort);
Parameters Description
ReaderPort
Port number. Available choices are “ACR120_USB1” to
“ACR120_USB8”.
Return Value
INT16 Handle for further operations. Error Code < 0
Table 2 : ACR120_Open Command Description
Low Level Frame Structure:
Command: From PC to Reader (5 bytes)
Command Code
(1 byte)
Command Data Length
(1 bytes)
Instruction Code
(1 byte)
Data Length
(1 byte)
E0h 02h 05h 00h
Response: From Reader to PC (5 bytes) << Success or Fail >>
Response Code
(1 byte)
Response Status
(2 bytes)
Response Data Length
(2 bytes)
E1h INT16 0000h