User's Manual

29.05.2007 Page 56 of 59
ASR500 Reader Operation
14. Appendix
14.1 RF synchronisation
If only one reader is to be accessed at any one time by the control computer – in other words,
only that reader's RF field is activated – then wire-based synchronisation will not be necessary.
If several readers are operated in the immediate vicinity of each other (in other words, closer
together than 3 m) and the readers have been configured for HDX acquisition, it is possible that
the corresponding synchronisation will be necessary. This is described in chapter 6.
14.2 Description of commands and acknowledgements
Command /
Request
Cod.
Hex
Addnl.
Data
Description
Connect_RQ 0x01 - Interrogate connection status
Get_Amplitude 0x83 - Output the amplitude of the antenna
Get_Config 0x29 Address Output the current configuration
Get_HDX_Sample 0x91 - Output 512 byte RSSI after field of approximately over
the length of a HDX transponder telegram
Get_Last_ID 0x24 - Interrogate the oldest ID in the buffer
Get_Phase 0x82 Frequency Output phase difference of antenna
Get_PhaseAmplitude 0x86 C-pattern,
Frequency
Output phase difference and amplitude of the antenna
Get_RSSI 0x85 - Output RSSI after field off is transmitted
Get_Single_ID 0x22 - Start a read cycle, field is switched on before and off
after acquisition
Get_SNR 0x0A - Output the reader serial number
Get_TuningResult 0x89 - Output result of last auto trim
Get_Tuning 0x43 - Interrogation of the state of antenna tuning (corresponds
to what is displayed by the antenna tuning LEDs), see
chapter 2.2.4
Get_Version 0x09 - Output of the reader and software version
Reset_All 0x18 - Copy default configuration from ROM to RAM
Retransmit_
Request
0x30 - Repetition of the last output
Save_Config 0x2A - Copy configuration from RAM into EEPROM
Set_Config 0x28 Address,
cfg_new
Set new configuration temporarily (RAM)
Set_TuningData 0x8A trim data Set temporarily trim data
Start_AutoTuning 0x87 - Starts auto tuning process
Response/
Acknowledge-
ments
Cod.
Hex
Addnl.
Data
Description
ACK 0x06 cmd,
data
Last command has been executed, following data
NAK 0x15 cmd Last command has not been executed
Output Cod.
Hex
Addnl.
Data
Description
ID_message 0x23 ID,… Transponder ID