User Manual Part 2

RFID Interface
LRP2000 Long Range Passice Reader/Writer
93
Example
The following example sets Output B only and resets A, C, and D.
Command from host Response from controller
MSB LSB Remarks MSB LSB Remarks
AAH 10H Perform
Command 10
AAH 10H Command echo
00H 02H Set Output B FFH FFH Message
Terminator
FFH FFH Message
Terminator
*******************************************************************************
ABxS Command 11H: Input Status
DESCRIPTION
Returns the status of User Inputs.
DISCUSSION
This command will interrogate the state of the User Input lines and
return a one-Byte parameter, Input Status. The least significant nibble
of the Input Status Byte is determined by the status of the outputs.
The least significant bit of this nibble corresponds to Input A. The
most significant bit of this nibble corresponds to Input D. The most
significate nibble of the Input Status Byte will be set to 0H. A closed
circuit in one of the User Inputs will set the corresponding User Input
bit to one, turning the corresponding LED on. An open circuit in one of
Message Terminator FFFFH
Field Remarks