AEG Identifikationssysteme AREK1-1 RFID Reader User Manual ARE K1 set of comands englisch

AEG Identifikationssysteme GmbH RFID Reader ARE K1 set of comands englisch

user manual

          Set of Commands for ARE K1 / RS232
                 --------------------------------------------------------------------------------2/26--------------------------------------------------------------------------------  Inhalt  1 INTRODUCTION ............................................................................................................5 2 MODES OF OPERATING ...............................................................................................5 2.1 Change of Operating mode ........................................................................................................................5 2.2 Operating mode 0 - continuous mode .........................................................................................................6 2.3 Operating mode 1 - running externally triggered........................................................................................6 2.4 Operating mode 2 - reading triggered by the serial interface .....................................................................8 3 PROTOCOL FORMAT ..................................................................................................... 8 3.1 Echo function ............................................................................................................................................8 3.2 Entering of commands...............................................................................................................................9 3.3 Output format............................................................................................................................................9 3.3.1 Command specific response.................................................................................................................9 3.3.2 Response to a parameter change .........................................................................................................9 3.3.3 Response to a parameter query .........................................................................................................10 3.4 Parameters .............................................................................................................................................10 3.4.1 Set of parameters.............................................................................................................................10 3.5 Blank input line.......................................................................................................................................10 3.6 Erroneous entering of commands - error codes ........................................................................................11 3.7 Boot message..........................................................................................................................................11 3.8 Use of capital letters ...............................................................................................................................11 3.9 Line feed ................................................................................................................................................11 3.10 Output format for the transponder number...........................................................................................11 3.10.1 Output format for the NoRead information .......................................................................................12 3.10.2 Output of a reader number................................................................................................................12 4 COMMAND SET SPECIFICATION...............................................................................12 4.1 ALGO......................................................................................................................................................12 4.2 BD ..........................................................................................................................................................12 4.3 CID .........................................................................................................................................................13 4.4 CN ..........................................................................................................................................................14
                 --------------------------------------------------------------------------------3/26--------------------------------------------------------------------------------   4.5 DIAG ......................................................................................................................................................14 4.6 EC ..........................................................................................................................................................15 4.7 GT ..........................................................................................................................................................15 4.8 INIT .......................................................................................................................................................15 4.9 MD .........................................................................................................................................................16 4.10 NID .....................................................................................................................................................16 4.11 NRD ....................................................................................................................................................17 4.12 QR1.....................................................................................................................................................17 4.13 QN1.....................................................................................................................................................17 4.14 RNR ....................................................................................................................................................18 4.15 RST.....................................................................................................................................................18 4.16 TOR.....................................................................................................................................................18 4.17 VER ....................................................................................................................................................19 4.18 VS.......................................................................................................................................................19 4.19 VSAVE................................................................................................................................................19 5 DESCRIPTION OF HARDWARE NEAR FUNCTIONS ..................................................21 5.1 Cold start ................................................................................................................................................21 5.2 Interface to the master ...........................................................................................................................21 5.3 Digital trigger input.................................................................................................................................21 5.3.1 Logical level.....................................................................................................................................21 5.3.2 Timing characteristics ......................................................................................................................21 5.4 Digital trigger outputs .............................................................................................................................21 5.4.1 Logical level.....................................................................................................................................22 5.4.2 Logical function ...............................................................................................................................22 5.5 Indicating elements (LEDs).....................................................................................................................22 5.6 DIP-switches...........................................................................................................................................22 6 APPENDIX ..................................................................................................................24 6.1 Glossary ..................................................................................................................................................24
                 --------------------------------------------------------------------------------4/26--------------------------------------------------------------------------------   6.2 list of control characters..........................................................................................................................24 6.3 List of error messages .............................................................................................................................25 6.4 List of system commands.........................................................................................................................25 6.5 List of parameters and default values ......................................................................................................25
                 --------------------------------------------------------------------------------5/26--------------------------------------------------------------------------------  1 Introduction The individual command set of a readers or decoders manufactured by AEG ID base on standardized com-mand sets, that are specific to each class of readers/decoders. This standardized command sets are desig-nated as ASB, which means AEG ID Standardized Command Set. The standardized command sets make it possible to use different hardware components (within a class of readers/decoders) without modification of the software application.  The command set of the ARE K1 is compatible to the ASB 1.0. Beyond it the ARE K1 RS232 is provided with a special command for self-diagnosis and extended parameter settings as well. The difference between the command set of the ARE K1 and the ASB 1.0 is made quite clear at the rele-vant subjects in this description. 2 Modes of operating Three basic modes of operating are defined: • Operating mode 0 (continous mode) - reader is automatically triggered • Operating mode 1(external mode) - reader is externally triggered • Operating type 2 (command mode)- reader is triggered by serial interface  2.1 Change of Operating mode The operation mode of the ARE K1 can be changed out of each operation mode using the MD command1.                                                       1 this behaviour is not universally applicable at ASB 1.0
                 --------------------------------------------------------------------------------6/26--------------------------------------------------------------------------------  2.2 Operating mode 0 - continuous mode When operating continuously the exciter is switched on permanently. The reading cycles are initiated peri-odically. After an accomplished reading cycle the reading information is evaluated. After that data (either trans-ponder number or NoRead code) is output to the serial interface. exciterprocessorinterfacereading cycle ID ID IDreading cycle  reading cycle        Figure 2.1: continuous operation 2.3 Operating mode 1 - running externally triggered In operation mode 1 the exciter is turned off. As soon as the external triggered signal rises from logic 0 to 1, the exciter is started and a reading process is initiated.  trig_inprocessorinterfaceexciterIDreading cycle    Figure 2.2: external triggering -limitation of the switch period through a successful reading  After a successful reading cycle, the exciter is turned off immediately (irrespective of the trigger signal). The next reading cycle starts at the next leading edge (0 to 1) of the trigger signal. If a reading cycle is not successful, the reading process is controlled by the state of the external trigger signal: further reading cycles are started as long as either a successful cycle has occurred or the exter-nal trigger signal is logic 0 again. In the latter case the identification NoRead code is output.
                 --------------------------------------------------------------------------------7/26--------------------------------------------------------------------------------  trig_inprocessorinterfaceexciterNoReadreading processreading cycle  reading cycle  reading cycle    Figure 2.3: external triggering - limitation of the switch period through the Trig_In signal Please note: In the course of the reading process no NoRead message will be output!
                 --------------------------------------------------------------------------------8/26--------------------------------------------------------------------------------  2.4 Operating mode 2 - reading triggered by the serial interface In operating mode 2, the exciter is always turned off. Triggered by the command GT, the exciter is acti-vated. After successful reading of a transponder number the exciter is turned off automatically.   exciterprocessorinterfacereading cycle IDGT   Figure 2.4: software triggered reading operation If the first reading cycle yields no result (NoRead), the on-time of the exciter is limited by the parame-ter TOR (time out reader): Reading cycles are continuously started until either a transponder is read successfully or the time span corresponding to the value of the parameter TOR has expired. The reader will not interrupt the last running readout cycle. If no transponder number has been read, a NoRead is output. exciterprocessorinterfaceTORGTreading processNoReadreading cycle  reading cycle  reading cycle    Figure 2.5: software triggered reading operation with TOR>0 Please note: Within the time span defined by the value of TOR no NoRead will be output on the interface! 3 Protocol format The command set described in this chapter defines the transfer of data on the serial interface. The commands consist of a command code and of a parameter value optionally. Commands are termi-nated by the control character <CR> (13H). The control character terminates the command line. Command codes and parameters, that means all letters and numerical values, are principally transmitted as a sequence of ASCII characters (the value 255 (decimal) consequently as 32H, 35H, 35H; the command RST as 52H, 53H, 54H). 3.1 Echo function The echo function can be switched on or off.
                 --------------------------------------------------------------------------------9/26--------------------------------------------------------------------------------  If the echo function is activated using the EC command, every signal sent to the reader is immediately sent back (echoed) after receipt. Thus the echo function can be used as life indication. If the reader is controlled by a terminal, the echo function should normally be activated. If an echo function is not intended, e.g. in automation applications where the reader might be connected to an PLC, the echo function should be deactivated.   3.2 Entering of commands The protocol format is as follows command <SP> parameter <CR> The space character <SP> separates the commands from the parameter value. The <CR> character terminates the command line. For commands without parameter values (e.g. GT or RST) the <SP> character and parameter values are omitted. The command line is as short as this: command <CR>. 3.3 Output format Generally, every input terminated by <CR> is acknowledged by the reader. The following response proto-cols are different: 3.3.1 Command specific response After a correct command without parameter value is sent to the reader, the reader answers using a for-mat, which is specific for the submitted command. Example: Command:  GT <CR> Output:  transponder number <CR> or NoRead-code2 <CR> 3.3.2 Response to a parameter change After entering a valid command together with a parameter value, the system answers by sending the pa-rameter value and <CR>. Example: Command:  MD <SP> 1 <CR> Output:  1 <CR>                                                       2see chapter3.10.1
                 --------------------------------------------------------------------------------10/26--------------------------------------------------------------------------------  After entering an invalid parameter value, the system answers with the corresponding error code (see chap-ter 3.6 ). 3.3.3 Response to a parameter query Parameter settings can be queried by sending the command without adding an parameter value. Example: Command:  MD <CR> Output:  1 <CR> 3.4 Parameters Generally a command comes with one parameter value at the most. Command code and paramter value are separated by SP>.  3.4.1 Set of parameters The ARE K1 is provided with three independent sets of parameters: • the set of parameters ex work • the set of parameters specific to the application plus • the actual set of parameters The set of parameters ex work enclose all original reader settings. This set is stored in the EPROM and can’t be changed. The set of parameters specific to the application is stored in an EEPROM. This set de-fines the configuration after a cold start. The actual set of parameters defines the actual function of the decoder. It is stored in the RAM.   All changes of the parameter values have an effekt to the actual set of parameters only. This set is tem-porary, that means all values are lost after switching off the decoder.  Using the VSAVE command (see chapter 4.19) the actual set can be stored permanently as set of pa-rameters specific to the application. Then all values are loaded back automatically after a cold start. 3.5 Blank input line If a single <CR> is input, the reader answers with a single <CR>. Example: Command:  <CR> Output:  <CR>
                 --------------------------------------------------------------------------------11/26--------------------------------------------------------------------------------  Please note: If echo mode is active, a single <CR> forces the reader to output <CR> <CR> (echo plus output). 3.6 Erroneous entering of commands - error codes If a command is not entered correctly, the reader sends one of the following error codes: Wrong command:  <NAK> #00 <CR> Wrong parameter:  <NAK> #02 <CR> 3.7 Boot message After booting the system (cold and warm start) the software version is output as described for the VER command (see chapter 4.17), if echo is active. If echo is disabled, no boot message will appear. 3.8 Use of capital letters The standard operating system is not case-sensitive, that means capital- and small letters are treated the same. 3.9 Line feed A line feed character <LF> is not sent by the decoder. If the decoder is controlled by a terminal, a line feed can be added by the terminal software (option: replace CR by CR LF at receipt). 3.10 Output format for the transponder number The location of the transponder bits in the ASCII characters is shown in Table 3.1: D38 ... D32  D31 ... D24  D23 ... D16  D15 ... D8  D7 ... D0 ASC9   ASC8  ASC7   ASC6  ASC5   ASC4  ASC3   ASC2  ASC1   ASC0   Table 3.1: data format of the transponder number 0 0 0  0 0 0 0  0 0 0 1  1 1 1 1  0 0 1 1  0 1 1 1  1 0 1 1  1 1 0 1  1 0 0 1  0 0 1 0 00H  1FH  37H  BDH  92H 30H   30H  31H   46H  33H   37H  42H   44H  39H   32H   Table 3.2: example of a transponder number
                 --------------------------------------------------------------------------------12/26--------------------------------------------------------------------------------  The transponder ID 001F37BD92 will be transmitted on the interface using the characters 30H, 30H, 31H, 46H, 33H, 37H, 42H, 44H, 39H, 32H and <CR>. 3.10.1 Output format for the NoRead information An unsuccessful reading cycle is represented by the NoRead character sequence (see CN command in chap-ter 4.3). Normally the NoRead is coded by the number FFFFFFFFFF, which can never appear as trans-ponder code. Alternativly at the ARE K1 a NoRead information can be output using the error messages <NAK> #09 <CR>. For this the parameter value of CN has to be set to 23. 3.10.2 Output of a reader number For readers connected by a network the output of an individual reader identification is necessary, to assign a message with the belonging sender device. This identification can be made activating the RNR function (see chapter 4.14 - reader number). If the RNR function is active, each reader answer is preceded by a reader number and a space character as well (i.e 15 <SP>). 4 Command set specification 4.1 ALGO Algo defines the type of chip used. Input format:  ALGO <SP> Parameter <CR>  Parameter value Function 1  Trovan read only 2  PSK      output (example):  1 <CR> note:  After correct parameter setting, Algo defines chip type used.  4.2 BD The BD command enables the change of the baud rate.                                                       3 not compatible down to ASB 1.0
                 --------------------------------------------------------------------------------13/26--------------------------------------------------------------------------------  Input format:  BD <SP> Parameter <CR>  Parameter value Function 0  4800 baud 1  9600 baud 24  19200 baud 3  38400 baud      output (example):  2 <CR> note:  The settings are effective after a warm start using the RST command. 4.3 CID With CID=1 only the first of in succession identical transponder numbers is output on the serial interface. The possibly following identical transponder numbers are suppressed, as long as no new valid transponder number is received, processed and output. NoReads do not influence the data filtering input format:  CID <SP> parameter <CR>  Parame-ter Function 0  no filter function  1  suppression of repeatedly read IDs  output (example):  0 <CR> Example: A, B, C are specific different transponder numbers, N is NoRead: Sequence of reading cycles  Output sequence after filtering with CN=0 and CID=1 Output sequence after filtering with CN=1 and CID=1 N, N, ......,N, A, A, A, ....A, N,N, .........  N, N, ......,N, A, N, N, ....... A N. N, N, A, A, A, N, A, A, B, A, C, C, C, ....... N. N, N, A, N, B, A, C, ..... A, B, A, C N, N, B, B, B, B, B, N, N, N, B, B, B, B, N, N,... N, N, B, N, N, N, N, N,... B N, N, N, B, B, B, B, B, N, B, B, B, B, N, N, N, .... N, N, N, B, N, N, N, N, .... B   Table 4.1: example for the effect of the CID function annotation:  The internal reference number is cleared at the following conditions:  • after a cold start • after a warm start                                                       4 default values are underlined
                 --------------------------------------------------------------------------------14/26--------------------------------------------------------------------------------  • after entering the command line CID <SP> 1 <CR>    This causes that the next transponder code is output definitely. caution:   The  filter  function  CID  picks  up  the  results  of  the  complete  reading  cycles, while the parameter NID proceeds from the results of single readings! The filter function  CID has  effect on the serial interface only. The digital output QR1 is not effected by CID. 4.4 CN The CN parameter defines the type of NoRead output. input format:  CN <SP> parameter <CR>  Parameter  Function 0  issue NoReads on serial interface using FFFFFFFFFF 1  suppress NoReads on serial interface 2  issue NoReads on serial interface using <NAK> #09 <CR>5  output (example):  0 <CR> 4.5 DIAG A self-diagnosis is executed. An antenna test is included. input format:  DIAG <CR>  function:  A test of the antenna is executed . After this either the message <NAK> #99 <CR> (o.k.) is output on the interface or the message <NAK> #10 <CR> (an-ntenna failure).  annotation:  With an antenna failure the Error-LED is set.                                                       5 parameter value 2 is not compatible down to ASB 1.0
                 --------------------------------------------------------------------------------15/26--------------------------------------------------------------------------------  4.6 EC The EC parameter changes of the echo function setting. input format:  EC <SP> parameter <CR>  Parameter  Function 0  echo on 1  echo off  output (example):  0 <CR> 4.7 GT The reading command code is GT. For details to this function see chapter 2. input format:  GT <CR> output:  Dependent of the parameter settings and the actual antenna input signal, three   different responses are possible in operating mode 2:  • Transponder number, e.g. 001F37BD92 <CR>  • NoRead, e.g. FFFFFFFFFF <CR>  • <CR> as command acknowledge, if a filter function is active, which cut   the transponder code or the NoRead result.  annotation:   In mode 2 the GT command triggers a reading process.  In mode 1 the GT command is effectiv too6.  In mode 0 the GT command has no effect. 4.8 INIT With INIT a warm start with default values is executed. input format:  INIT <CR>       output:  Version number <CR> if EC=1, otherwise <CR> only course:                                                       6 not compatible down to ASB 1.0
                 --------------------------------------------------------------------------------16/26--------------------------------------------------------------------------------  EPROMset of parameterex work(default values)RAMactual set ofparameterINIT   Figure 4.1: function of  INIT 4.9 MD The command MD changes the operating mode. input format:  MD <SP> parameter <CR>  Parameter  Function 0  continuous operation 1  externally triggered 2  triggered via serial interface  output(example):  0 <CR> 4.10 NID NID specifies the number of identical transponder numbers, which have to appear for the result ”suc-cessful reading” within a reading cycle. In the setting NID = 1, two successive readings have to show the same transponder number. input format:  NID <SP> parameter <CR>  Parameter  Function 0  one out of one (no effect) 1  two out of two  output (example):  1 <CR>  Sequence of readings  Length of the reading cycle Result of the reading cycle NoRead  1 reading  NoRead 0000125ED1, 0000125ED1  2 readings  0000125ED1 0000125ED1, 0000126ED1  2 readings  NoRead
                 --------------------------------------------------------------------------------17/26--------------------------------------------------------------------------------    table 4.2: example for a reading cycle with NID=1 4.11 NRD For improvement of the signal to noise ratio, a number of telegrams can be superimposed. The number of superimpositions is determined by the value NRD. input format:  NRD <SP> parameter <CR>  Parameter  Function 0  no superimposition - evaluation of one telegram only 1  superimposition of 2 telegrams 2   superimposition of 4 telegrams  output (example):  1 <CR> 4.12 QR1 The command QR1 changes the parameters of the digital port QR1. input format:  QR1 <SP> parameter <CR>  Parameter  Function 0  port turned off 1  port turned on 2  port controlled by previous reading process  output (example):  0 <CR> 4.13  QN1 The command QN1 changes the parameters for the digital port QN1.  input format:  QN1 <SP> parameter <CR>  Parameter  Function 0  port turned off 1  port turned on 2  port controlled by previous reading process  output (example):  0 <CR>
                 --------------------------------------------------------------------------------18/26--------------------------------------------------------------------------------  4.14 RNR Setting RNR not to 0 activtes the RNR fuction. Then each reader answer is preceded by a reader num-ber and a space character as well (i.e 15 <SP>).   input format:  RNR <SP> parameter <CR>  Parameter  Function 0  RNR function not active 1 ... 9  the one-digit reader number and <SP> is preceded to each reader answer 10 ... 99  the two-digit reader number and <SP> is preceded to each reader answer  output (example):  99 <CR> after entering RNR 99 <CR>       NAK#02 <CR> after entering RNR 1A <CR> 4.15 RST With RST a warm start is executed. All changed parameter values (i.e. BD) become effecive. The relays and error LEDs are cleared. input format:  RST <CR>       output:  Version number <CR> if EC=1, otherwise <CR> is output only 4.16 TOR Timeout for the reader. TOR is used in operation mode 2 as maximum gating time for a reading process (see chapter 2.4). The length of the maximum gating time results from the equation gating_time = TOR * TB. The time constant TB (Time Base) has always the default value 100ms. input format:  TOR <SP> parameter <CR>
                 --------------------------------------------------------------------------------19/26--------------------------------------------------------------------------------  Parameter7  Function 0  limits the reading process duration to exactly one reading cycle 1  Tmax = 100ms 2  Tmax = 200ms ...   5  Tmax = 500ms ...   255  Tmax = 25,5s  output (example):  2 <CR>, this means 200ms. 4.17 VER The command VER outputs the software version of the reader. The software version is permanently stored in the program memory together with the firmware. input format:  VER <CR>       output:  AEG <SP> ID <SP> - <SP> V1.4E <CR> 4.18 VS The command VS lists all current parameter settings. input format:  VS <CR>      output (example):  EC <SP> 0 <CR> BD <SP> 2 <CR>   MD <SP> 2 <CR> ..... 4.19 VSAVE All operating parameters temporarily stored are saved permanently using VSAVE. input format:  VSAVE <CR> output:  ok <CR> oder error message course:                                                       7 values > 9 are not compatible down to ASB 1.0
                 --------------------------------------------------------------------------------20/26--------------------------------------------------------------------------------  set of parameterspecific to theapplicationactual set ofparameterRAMVSAVEEEPROM   figure 4.2: function of VSAVE function:  While storing the parameter values the EEPROM is tested by „write and ver-ify“. On EEPROM-error the message <NAK> #03 <CR> is transmitted.
                 --------------------------------------------------------------------------------21/26--------------------------------------------------------------------------------  5 Description of hardware near functions 5.1 Cold start After a cold start the system is initialized using the parameter values out of the EEPROM. The indica-ting elements (relays / LEDs) are cleared. 5.2 Interface to the master The serial interface permits communication between the reader and a master (e.g. terminal or PC). The ba-sic configuration of the interface is 19200baud and 8N1 (8 bit, no parity and 1 stop bit). With the com-mand BD the reader can be set to a different baud rate. Changing the data format (8 data bits, no parity, 1 start- and stop bit) is not possible. The same applies to hardware-handshaking, e.g. Xon/Xoff or RTS/CTS. 5.3 Digital trigger input For the operating mode 1 - externally triggered - a digital input channel is required. The following logical function is defined: 5.3.1 Logical level If the digital input is open (not connected), then it is in the logical state zero (0). By feeding the defined input voltage the digital input has one-level (1). 5.3.2 Timing characteristics When triggered externally, the first reading process is initiated by a change from 0 to 1 (leading edge) - see chapter 2.3. 5.4 Digital trigger outputs Two specified digital outputs are defined as follows:
                 --------------------------------------------------------------------------------22/26--------------------------------------------------------------------------------  Output  Function QR1  trigger output - transponder read (QREAD) QN1  trigger output - NoRead (QNoREAD)   Table 5.1: definition of the  digital output channels 5.4.1 Logical level At rest all digital outputs are logical 0. This means the rest contact is closed and the working contact is open. 5.4.2 Logical function The logical function of the digital outputs is determined by the particular parameter setting. If QR1 = 2 resp. QN1 = 2, the logical function is defined as follows: After cold- and warm start all trigger outputs are set to logical zero. After processing the reading re-sult, the corresponding output is set to logical 1 according to Table 5.1.  If both trigger outputs QR1 and QN1 are set to parameter value 2, therefore only one of the trigger outputs can be at logical 1 at a time. The result of each reading cycle is displayed at the corresponding digital output until the end of the next reading process. The data filtering functions for the serial interface (e.g. CN - suppression of the NoRead output or CID) do not influence on the digital outputs.  5.5 Indicating elements (LEDs) LED1:  on when antenna is operated LED2:  on when last read was not successful LED3:  on when last read was a success LED4:  on as long as the digital input is high LED5:  on when a hardware error was detected LED6:  flashing as long as the reader is powered and the microprocessor is working properly LED7:  on as long as commands were received on the RS 232 interface LED8:  on as long as information is transmitted from the RS.232 interface LED9:  not used 5.6 DIP-switches In normal condion (ex work) all  DIP-switches are set OFF (down).
                 --------------------------------------------------------------------------------23/26--------------------------------------------------------------------------------  On1 2 3 4 5 6 7 8DIP-Switch  If switch 1 is in position ON, the default values (see chapter 3 - firmware) are loaded out of the EPROM at a cold start (when reader is put in operation). DIP-switches 2 ... 8 have no function.
                 --------------------------------------------------------------------------------24/26--------------------------------------------------------------------------------  6 Appendix 6.1 Glossary Telegram:  Sequence of 64 data bits transferred from the transponder to the reader. Superimposition:  Number  of  superimposed  telegrams  for  an  improved  signal  to  noise  ratio  ad-justed by the parameter NRD. Reading:  Interval  of  several  telegrams,  whose  number  is fixed  by  NRD.  The  result  of  a reading is a transponder number or NoRead. In contrast to the reading process a  reading  does  not  appear  at  an  external  interface,  that  means  the  result  is processed within the reading algorithm only. NoRead:  If it is not possible to determine a transponder number (no header, wrong par-ity, ...), then the reader operates for the next internal operations with the trans-ponder number FF FFFF FFFF (Hex) as NoRead information. NID:  This parameter sets the number of readings with identical transponder number, which have to appear within one reading cycle for the result ”successful reading cycle”.  Reading cycle:  Interval  of  several  readings.  The  maximum  length  of  intervals  is  fixed  by  the values of NRD and NID. A reading cycle is successful if within the reading cycle the number of readings specified by NID yields the same result. Reading process:  Interval of several readings. A reading process is started with occurrance of the trigger  condition.  The  reading  process  is either  terminated by  occurrence  of a successful reading cycle or through a break (time out, falling edge of the exter-nal trigger signal)8. At the end of a reading process appears always a result on the interface9. 6.2 list of control characters Steuerzeichen  Hexcode  Bezeichnung  Funktion SP  20H  space character  separates commands from parameters CR  0DH  carriage return  terminates command line NAK  15H  negative acknowledge  error code #  23H  number sign  error number DEL  7FH  delete  change of operation mode after a cold start table 6.1: List of the control symbols used                                                       8 In operating mode 0 is a reading process equal to a reading cycle. 9 The result will not appear when a data filter suppresses the result (e.g. NoRead suppression).
                 --------------------------------------------------------------------------------25/26--------------------------------------------------------------------------------  6.3 List of error messages error number  function  error-LED #00  command code not known, wrong code  no #01  stack-error (under- / overflow)  no #02  parameter value not valid  no #03  error in EEPROM  no #04  function not supportet  no #05  reserved  no #06  reserved  no #07  reserved  no #08  reserved  no #09  kein Code gelesen (NoRead)  no #10  antenna error  yes #99  system o.k. (DIAG state messages)  no Table 6.2: List of error messages 6.4 List of system commands command-code function  action on interface  Compability with ASB1.0 DIAG  diagnosis / state of the reader  state or error message  no GT  read transponder (get tag)  transponder number  yes INIT  load basic configuration  boot message / <CR>  yes RST  warm start  boot message / <CR>  yes VER  Output version number  version number  yes VS  Output of all parameter values  List of parameters  yes VSAVE  store current configuration  ok  yes Table 6.3: List of system commands 6.5 List of parameters and default values com-mand-code function  universally defined parameters (ASB 1.0) valid pa-rameter values for ARE K1 default-values MD  mode of operation  0 .. 2  0 .. 2  2 (triggered by  interface) BD  baud rate  0 .. 3  0 .. 3  2  (19200baud) EC  echo  0, 1  0, 1  0  (off) CN  suppression of NoRead  0, 1  0 .. 2   0  (output FFFFFFFFFF) CID  filter function for multiply read IDs  0, 1  0, 1  0 (filter off) NID  number of identical IDs per reading cycle  0 , 1  0 , 1  1 (two out of two) NRD  superimposition of telegrams  0 .. 2  0 .. 2  1 (two telegrams) RNR  reader identification number  -  0 .. 9, 10.. 99 0 (not active)
                 --------------------------------------------------------------------------------26/26--------------------------------------------------------------------------------  QN1  digital output QN1  0 .. 2  0 .. 2  2  (controlled by reading process) QR1  digital output QR1  0 .. 2  0 .. 2  2  (controlled by reading process) TOR  timeout parameter for unsuccessfull reading 0...9  0...255  5  (500ms) Table 6.4: List of parameters

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