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Organization of This Manual

This manual describes the features of the serial interface built into the Sound 

Level Meter NA-28. 

The manual contains the following three sections. 

Chapter 1 Preparations for USB Communication 

Describes how to connect the unit to a computer via a USB link and how 

to install the USB driver. The chapter also contains general information 

about usage. 

Chapter 2 Basic Syntax 

Explains USB related syntax and other items. 

Chapter 3 Command Reference 

Describes the commands for controlling the NA-28, including command 

format, functions, and other aspects. 

 *  All company names and product names mentioned in this manual are 

trademarks or registered trademarks of their respective owners. 

Summary of Contents for NA-28

Page 1: ...3 20 41 Higashimotomachi Kokubunji Tokyo 185 8533 Japan http www rion co jp english SERIAL INTERFACE MANUAL Sound Level Meter NA 28...

Page 2: ......

Page 3: ...al Interface Manual this document Describes communication with a computer using the serial interface built into the Sound Level Meter NA 28 The manual covers the com munication protocol use of control...

Page 4: ...ii...

Page 5: ...unit to a computer via a USB link and how to install the USB driver The chapter also contains general information about usage Chapter 2 Basic Syntax Explains USB related syntax and other items Chapte...

Page 6: ...Installation procedure 5 Connection to the computer 10 Disconnection from the computer 11 Checking the virtual COM port 12 Chapter 2 Basic Syntax 15 Outline 16 Local Mode Remote Mode 17 Transfer Code...

Page 7: ...v Chapter 3 Command Reference 31 Commands 32 Command List 32 Command Format 38 Error Codes 39 Parameters 39 Command Send Example 40 Command Description 41 Examples for Control Via External Commands 86...

Page 8: ...vi...

Page 9: ...ction to a Computer 3 Operating Environment 4 Installing the USB Driver 5 Installation procedure 5 Connection to the computer 10 Disconnection from the computer 11 Checking the virtual COM port 12 Cha...

Page 10: ...2 About USB Functionality The NA 28 supports operation control and data transfer via a USB connection Con nection of multiple units is not supported...

Page 11: ...o connect the USB port on the bottom of the Sound Level Meter NA 28 to the computer using a generic USB cable The USB cable is an optional DC 5 6V TRIG IN COMP OUT AC DC OUTPUT USB USB port Open cover...

Page 12: ...4 Operating Environment Supported Operating Systems Microsoft Windows XP Professional 32 bit Microsoft Windows 7 Professional 32 bit 64 bit Microsoft Windows 8 Pro 32 bit 64 bit...

Page 13: ...poration web site and install this driver on the computer to be used with the NA 28 The driver will create a virtual COM port on the computer Installation procedure When connecting the NA 28 and the c...

Page 14: ...6 Installing the USB Driver Follow the wizard to complete the installation Screens during installation are as follows...

Page 15: ...ust be completed before connecting the USB cable 3 Connect the NA 28 to the computer with a USB cable Important Connect the NA 28 directly with the USB cable to the computer If the NA 28 is connected...

Page 16: ...r detects the NA 28 Found New Hardware Wizard is started up Proceed following the wizard Select No not this time and click on Next In case of Windows 7 and Windows 8 When the computer detects the NA 2...

Page 17: ...k on Finish The driver installation creates a virtual COM port in the computer For infor mation on how to verify that the installation was successful see the section Checking the virtual COM port on p...

Page 18: ...r for the first time refer to page 3 1 Turn power to the NA 28 on select I O Input Output and set USB communication to ON 2 Connect the NA 28 to the computer with a USB cable Important Be sure to set...

Page 19: ...be followed when discon necting the unit 1 Click on the Safely remove hardware icon in the right section of the taskbar and select Safely remove USB Mass Storage Device Drive 1 1 The drive letter E i...

Page 20: ...the USB Driver Checking the virtual COM port 1 After installing the driver set USB Communication to ON at the NA 28 and connect the USB cable 2 Open the Device Manager Hardware tab under Properties i...

Page 21: ...T The indication RION USB to RS232C Converter Virtual COM Port should be shown as COM port name If this is not shown check the connection be tween the NA 28 and the computer step 1 If there is an over...

Page 22: ...14 MEMO...

Page 23: ...es 18 Transfer Format 19 ID ID Number 20 ATTR Block Attribute 21 Block Reception Processing 22 Command Types 22 Error Processing 23 Transfer Types 24 Communication Cutoff 29 Power Save Mode 29 Power O...

Page 24: ...n of the NA 28 from a computer by sending prescribed commands It also allows sending current measurement data from the NA 28 to the computer Note About transfer principle The NA 28 is connected to the...

Page 25: ...it is turned on Communication is also possible in this mode Remote mode This mode is for communication only The NA 28 cannot be operated with the keys on the unit The indication REMOTE is shown on the...

Page 26: ...NQ 05H Enquire ACK 06H Acknowledge NAK 15H Not acknowledge STX 02H Start block ETX 03H End block CR 0DH Terminator 1st character LF 0AH Terminator 2nd character SUB 1AH Stop Special codes ATTR Control...

Page 27: ...elimiter Acknowledge response block Computer or NA 28 STX ID ATTR ETX CR LF 1 1 1 N 1 1 1 1 byte ATTR Response data A or Q 00H Not Acknowledge response block Command from NA 28 STX ID ATTR ETX CR LF 1...

Page 28: ...the target de vice for communication In a send block from the measuring device the ID number identifies the device itself Broadcast ID number 00 is reserved for broadcasting a command from the compute...

Page 29: ...ransfer Format ATTR Block Attribute The block attribute information is added by the sender to facilitate process ing of the block at the receiving end STX ID ATTR ETX CR LF 1 1 1 1 1 1 1 byte ATTR SUB...

Page 30: ...etting command This type of command serves for changing the sound level meter status or measurement parameters Only some commands of this type will produce a response from the sound level meter For co...

Page 31: ...excluding ID number Start block again from that point Command processing errors Block format is correct but command interpretation or processing has re sulted in an error Error item Contents Processi...

Page 32: ...r sequence The setting sequence can be selected to have a response or not The sample sequences shown below generally assume that the block from the computer comprises the ID of the sound level meter C...

Page 33: ...here processing is completed For example for the Execute store command it is the point where the store execution has started Computer Sound level meter Command block Block normal Acknowledge block Pro...

Page 34: ...tely after receiving the request command Irregular execution When a block or command processing error has occurred a Not Acknowl edge response is sent Computer Sound level meter Command block Block no...

Page 35: ...top the process the stop request command SUB is sent from the com puter Any other command is disregarded by the sound level meter The block sending process continues indefinitely as long as the SUB co...

Page 36: ...essing Irregular sequence When an error generating a response on the block level has occurred the following sequence occurs Computer Sound level meter Any block Block error or BCC error Not Acknowledg...

Page 37: ...unit enters the sleep state after the current block has been sent In the sleep state the sound level meter does not send or accept commands Power Off During power off processing communication is termi...

Page 38: ...cter inter val Max 100 ms Interval until sound level meter enters idling state after send ing data Max 200 ms After receiving data from the sound level meter wait at least 200 ms before sending the ne...

Page 39: ...ontents Commands 32 Command List 32 Command Format 38 Error Codes 39 Parameters 39 Command Send Example 40 Command Description 41 Examples for Control Via External Commands 86 Chapter 3 Command Refere...

Page 40: ...M RTA key 41 DSP Set display data S R MODE key 42 GRP Toggle graphical numeric display S R GRP NUM key 43 WGT Set frequency weighting charac teristic S R FREQ WEIGHT key 43 TMC Set time weighting char...

Page 41: ...SET Get all measurement parameters R N A 50 SYS Apply setup file S System Save Load Set tings 54 Data related commands Command Function Corresponding key menu item Page LTI Elapsed measurement time R...

Page 42: ...ion commands Command Function Corresponding key menu item Page CAL Calibration status S R CAL STORE key 62 CBM Calibration volume S R keys during calibra tion 62 Memory related commands Command Functi...

Page 43: ...l display 66 MDC Clear stored data from internal memory S Recall CAL 66 SPM Sleep mode S R Measurement Trigger mode Sleep mode 67 System commands Command Function Corresponding key menu item Page BAT...

Page 44: ...ment Trigger mode 72 LTC Trigger channel for SLM mode S R Measurement Trigger mode 73 TTR Trigger time S R Measurement Trigger mode 74 CMP Comparator S R Input Output Compara tor 75 CML Comparator lev...

Page 45: ...R Input Output Beep 79 IDX Index S R Input Output Index 80 Communication control commands Command Function Corresponding key menu item Page RMT Remote mode S R N A 81 EST Error information R N A 81 Da...

Page 46: ...has a parameter the parameter follows the command It can be appended to the command either directly or with a separating space p1 Valid _ p1 Valid When a command has several parameters the parameters...

Page 47: ...e not implemented _1 Valid _10 Valid _01 Not valid Error Codes Error code Meaning 0001 Undefined command or other command problem 0002 Parameter number or value not valid 0003 Processing not possible...

Page 48: ...ssed as 01H ID number 1 to FFH ID number 255 Note Do not use ASCII 01 here Express 01 in 2 digit hexadecimal notation i e 01H 3 Attribute C for command Always C 4 Command 3 alpha characters 5 Paramete...

Page 49: ...currently in Lp mode except pause In other cases error 0003 is returned Setting command IMD p1 Parameter Content p1 0 SLM sound level meter mode p1 1 OCT octave analysis mode p1 2 1 3OCT 1 3 octave an...

Page 50: ...Lmax screen p1 4 Lmin screen p1 5 LN1 screen p1 6 LN2 screen p1 7 LN3 screen p1 8 LN4 screen p1 9 LN5 screen p1 10 List screen p1 11 Time Level screen Specifying a screen that is set to OFF on the Dis...

Page 51: ...ame as for setting command WGT Set frequency weighting characteristic corresponds to FREQ WEIGHT key operation main Sub channel measurement Fre quency weighting sub Only valid if the unit is currently...

Page 52: ...ause In other cases error 0003 is returned Setting command TMC p1 p2 Parameter Content p1 p2 0 F Fast p1 p2 1 S Slow p1 p2 2 10 ms p2 3 I Impulse p1 specifies the time weighting for the main channel a...

Page 53: ...ently in Lp mode except pause In other cases error 0003 is returned Setting command RNG p1 Parameter Content p1 0 80 dB range p1 1 90 dB range p1 2 100 dB range p1 3 110 dB range p1 4 120 dB range p1...

Page 54: ...inutes p2 2 h Hours The maximum allowable setting time is 24 hour when store mode is Manual or Auto2 Request command MTI Response data d1 d2 Return value Content Same as for setting command d1 specifi...

Page 55: ...Delay time seconds Request command DLT Response data d1 Return value Content Same as for setting command MAX Lmax Lmin type corresponds to Measurement Lmax Lmin type Only valid if the unit is currentl...

Page 56: ...command also if it is in sound level meter mode Request command MXD Response data d1 Return value Content Same as for setting command LNM LN mode corresponds to Measurement LN mode Only valid if the...

Page 57: ...ion p1 1 ON Request command WSC Response data d1 Return value Content Same as for setting command DFC Diffuse sound field compensation corresponds to Measurement Diffuse sound field compensation Only...

Page 58: ...d2 of WGT command d4 Main channel time weighting characteristic Corresponds to d1 of TMC command d5 Sub channel time weighting characteristic Corresponds to d2 of TMC command d6 Level range Correspond...

Page 59: ...PI command d22 LN2 display Corresponds to d6 of DPI command d23 LN3 display Corresponds to d7 of DPI command d24 LN4 display Corresponds to d8 of DPI command d25 LN5 display Corresponds to d9 of DPI c...

Page 60: ...r mode Corresponds to TRG command d40 Trigger level Corresponds to d1 of LTR command d41 Trigger slope Corresponds to d2 of LTR command d42 Trigger band octave Corresponds to d1 of LTB command d43 Tri...

Page 61: ...ponds to CMP command d55 Comparator level Corresponds to CML command d56 Comparator band octave Corresponds to d1 of CMB command d57 Comparator band top center bottom Corresponds to d2 of CMB command...

Page 62: ...pause In other cases error 0003 is returned Setting command SYS p1 Parameter Content p1 1 to 5 Setup file number Note that if USB communication is set to OFF in the specified setup file communication...

Page 63: ...command LTI Response data d1 d2 d3 Return value Content d1 Hours d2 Minutes d3 Seconds In case of the store mode is Auto1 or Auto2 the response data as follows Response data d1 d2 d3 d4 Return value C...

Page 64: ...rement setting Only valid if the unit is currently in Lp mode except pause In other cases error 0003 is returned Setting command SCH p1 Parameter Content p1 0 OFF sub channel not displayed p1 1 ON sub...

Page 65: ...set here will affect the DSP command Setting command DPI p1 p2 p3 p11 Parameter Content p1 to p11 0 OFF p1 to p11 1 ON p1 Leq screen p2 LE screen p3 Lmax screen p4 Lmin screen p5 LN1 screen p6 LN2 sc...

Page 66: ...and LXI Response data d1 d2 d3 d4 d5 Return value Content Same as for setting command ADP Sub channel additional processing corresponds to Sub channel measurement Lpeak Ltm5 Only valid if the unit is...

Page 67: ...ble Do not specify this p1 2 16 Hz band p1 3 31 5 Hz band p1 4 63 Hz band p1 5 125 Hz band p1 6 250 Hz band p1 7 500 Hz band p1 8 1 kHz band p1 9 2 kHz band p1 10 4 kHz band p1 11 8 kHz band p1 12 16...

Page 68: ...ent while a processing measurement is in progress processing will restart Request command SRT Response data d1 Return value Content d1 1 Processing measurement d1 0 Processing measurement stopped or a...

Page 69: ...just ment mode the command is not valid and error 0003 is returned During auto store the command is not valid and error 0003 is re turned Setting command PSE p1 Parameter Content p1 1 Activate pause p...

Page 70: ...Response data d1 Return value Content Same as for setting command CBM Calibration volume corresponds to key operation during calibration Only valid if the unit is currently in calibration mode In othe...

Page 71: ...t is currently in Lp mode except pause In other cases error 0003 is returned This specifies the name of the store folder on the CF card Setting command SNS p1 Parameter Content p1 0000 to 9999 Numeric...

Page 72: ...0 10 ms to 1000 ms in 10 ms steps p1 0 Leq 1s use 0 to specify 1 second Leq p2 0 100 ms in sound level meter mode only 0 can be specified In analyzer mode sampling cycle is p1 In sound level meter mod...

Page 73: ...if the store mode is not manual Request command ADR Response data d1 Return value Content d1 1 to 1000 When unit is in manual store mode When the unit is not in manual store mode an indeterminate valu...

Page 74: ...n value Content d1 0 No CF card inserted d1 1 CF card inserted d1 2 CF card being checked There is no setting command MDC Clear stored data from internal memory corresponds to Recall Delete selected d...

Page 75: ...is also disabled and no commands will be accepted Use of this command therefore is usually not recommended The command is only valid if the unit is currently in Lp mode except pause In other cases er...

Page 76: ...d CLK Current date time corresponds to System Current Date Time The setting command is only valid if the unit is currently in Lp mode except pause In other cases error 0003 is returned The request com...

Page 77: ...remain ON All other settings except USB communication are returned to the default condition The unit index is incremented by 1 Keep this in mind if you are using an index other than 1 VER Version no c...

Page 78: ...ontent p1 0 OFF p1 1 MAIN p1 2 SUB Request command ACO Response data d1 Return value Content Same as for setting command DCO Select DC output corresponds to Input Output DC output Only valid if the un...

Page 79: ...e Content Same as for setting command LTR Trigger level corresponds to Measurement Trigger mode Trigger level setting Only valid if the unit is currently in Lp mode except pause In other cases error 0...

Page 80: ...MAIN AP p1 2 16 Hz p1 3 31 5 Hz p1 4 63 Hz p1 5 125 Hz p1 6 250 Hz p1 7 500 Hz p1 8 1 kHz p1 9 2 kHz p1 10 4 kHz p1 11 8 kHz p1 12 16 kHz p2 0 Bottom band p2 1 Center band p2 2 Top band To specify a 1...

Page 81: ...r mode Trigger band setting Only valid if the unit is currently in Lp mode except pause In other cases error 0003 is returned Setting command LTC p1 Parameter Content p1 0 SUB AP p1 1 MAIN AP Request...

Page 82: ...to 31 Start Day p3 0 to 23 Start Hours p4 0 to 59 Start Minutes p5 1 to 12 End Month p6 1 to 31 End Day p7 1 to 23 End Hours p8 0 to 59 End Minutes p9 0 Trigger interval OFF p9 1 Trigger interval 5 m...

Page 83: ...0 OFF p1 1 ON Request command CMP Response data d1 Return value Content Same as for setting command CML Comparator level corresponds to Input Output Comparator Comparator level setting Only valid if...

Page 84: ...4 63 Hz p1 5 125 Hz p1 6 250 Hz p1 7 500 Hz p1 8 1 kHz p1 9 2 kHz p1 10 4 kHz p1 11 8 kHz p1 12 16 kHz p2 0 Bottom band p2 1 Center band p2 2 Top band To specify a 1 3 octave band use p1 to specify t...

Page 85: ...meter Content p1 0 SUB AP p1 1 MAIN AP Request command CMC Response data d1 Return value Content Same as for setting command RMC Remote control corresponds to Input Output Remote control Only valid if...

Page 86: ...pa ol p1 4 French Request command LNG Response data d1 Return value Content Same as for setting command BLA Backlight auto off interval corresponds to Input Output Back light auto off Only valid if th...

Page 87: ...BLB p1 Parameter Content p1 0 Dark p1 1 Bright Request command BLB Response data d1 Return value Content Same as for setting command BEP Beep tone corresponds to Input Output Beep Only valid if the u...

Page 88: ...use In other cases error 0003 is returned Setting command IDX p1 Parameter Content p1 1 to 255 Index value When changing the index setting keep in mind that the new index will have to be specified in...

Page 89: ...inactive regardless of its setting When remote mode has been set to Off 0 the operation keys on the unit are active and the infrared remote control operates according to its setting Setting command R...

Page 90: ...ain channel LN1 d7 xxx x Main channel LN2 d8 xxx x Main channel LN3 d9 xxx x Main channel LN4 d10 xxx x Main channel LN5 d11 xxx x Sub channel Lp d12 xxx x Sub channel Leq d13 xxx x Sub channel LE d14...

Page 91: ...d information 1 Yes 0 No d15 0 or 1 Under range information 1 Yes 0 No When sub channel display is set to OFF d1 is returned as _ with a leading space 1 3 octave analyzer mode Response data d1 d2 d37...

Page 92: ...kHz OCT d13 16 kHz OCT d14 xxx x 12 5 Hz 1 3OCT d15 xxx x 16 Hz 1 3OCT d16 xxx x 20 Hz 1 3OCT d44 xxx x 12 5 kHz 1 3OCT d45 16 kHz 1 3OCT d46 20 kHz 1 3OCT d47 0 or 1 Overload information 1 Yes 0 No d...

Page 93: ...d2 xxx x Main channel Leq d3 xxx x Main channel Lmax d4 xxx x Main channel Lmin d5 xxx x Sub channel Lp d6 xxx x Sub channel Leq d7 xxx x Sub channel Lmax d8 xxx x Sub channel Lmin d9 0 or 1 Overload...

Page 94: ...setting was made properly using a request command after sending a setting command is recommended Refer to the page 40 for sending a command format Example Get sound level Power ON cannot be controlle...

Page 95: ...20 to 80 dB Measurement time 10 sec Power ON Settings WGT1_ Main C TMC0_ Main F RNG0 20 to 80 dB MTI10_0 10 s DPI1_1 Set Leq to On 11 parameters must be set DSP1 Show Leq value on display SRT1 Start...

Page 96: ...inserting a CF card Settings WGT1_ Main C TMC0_ Main F RNG5 40 to 130 dB MTI5_1 5 m SMD1 AUTO1 SNS0001 File name PLP100_ 100 msec Establish the above settings to prepare the Auto1 measurement STO1 St...

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