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IM CW240C-E

1. Syntax DOUTput ITEM3 lt Numeric gt DOUTput ITEM3 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bitO lt Numeric gt 4 system 3 system 2 system 1 system load load load load Example Commands DOUT ITEM3 15 Queries DOUT ITEM3 Response Header ON DOUTPUT ITEM3 15 Header OFF 15 Sets queries group 4 of output data items Syntax DOUTput ITEM4 lt Numeric gt DOUTput ITEM4 f bit7 bit6 bit5 bit4 bit3 bit2 bit1 bito lt Numeric gt P 14 13 12 i U3 U2 U1 Example Commands DOUT ITEM4 255 Queries DOUT ITEM4 Response Header ON DOUTPUT ITEM3 255 Header OFF 255 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 30 Sets queries group 5 of output data items Syntax DOUTput ITEMS lt Numeric1 gt lt Numeric2 gt lt Numeric3 gt lt Numeric4 gt lt Numeric5 gt lt Numeric6 gt lt Numeric7 gt lt Numeric8 gt DOUTput ITEM5 N aj bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 lt NUMENnG gt Allorders Allodd All even N bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 Sune eS 8th order 7th 6th 5th 4th 3rd 2nd ist N ic3 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 lt NUMeErNCo gt etnearder 15th 14th 13th 12th 11th 10th 9th N oa bit7 bit6 bit5 bit4 bit3 bit2 bit1 bitO SINOME I sanorder 23th 22th 24th 20th 19th 18th 17th N cS
2. The question mark at the end of the header denotes a query You cannot omit the question mark Example SySTem cannot be abbreviated to anything shorter than SYST IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 5 2 3 Response Upon receiving a query from the personal computer the CW240 returns a response mes sage to the computer Aresponse message is sent in either of the following forms Response consisting of a header and data If the response can be used directly as a program message the response message will include the command header Response consisting of data only If the response cannot be used directly as a program message i e the response is a query only command the response message will include only the data However some query only commands will include a header When you want a response without a header You can have the header removed from a response that has a header and data by using the COMMunicate HEADer command IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 6 2 4 Data Data The data section comes after the header A space must be included between the header and the data The data contains conditions and values It is classified as follows Data Description lt Numeric gt Numerical value lt Decimal gt Value expressed as a decimal number lt Voltage gt lt
3. Transmitted Data Received Data Request to Send 3 2 7 8 Examples of Connecting Signal Lines E Personal computer In general use a cross cable e OFF OFF XON XON Clear to Send e XON RTS XON RS PC CW240 PC SD 3 3 SD SD 3 RD 2 gt lt pp RD 2 RS 7 7 RS RS 7 cs 8 8 CS cS 8 SG 5 5 SG SG 5 CTS RTS CS RS PC CW240 SD 3 3 SD RD 2 gt RD RS 7 7 RS cs 8 1 8 cs SG 5 5 SG E Printer Use a straight cable Use a straight cable Printer CW240 sD 3 3 SD RD 2 2 RD RS 8 8 CS GND 5 _ 5 GND CW240 3 SD 2 RD 7 RS 8 CS 5 SG Please refer to the IM CW240 user s manual for the signals on the printer side IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 1 RS 232 Communication Function gt 1 4 1 3 Handshake Methods For the CW240 clamp on power meter to be able to communicate with a personal computer through the RS 232 interface the equipment on both sides must agree on a set of rules and go through a series of procedures relating to electrical signals to ensure reliable data exchange This series of procedures is called a handshake Because there are many handshake methods that can be used in combination with a computer It is essential that the same method is chosen for the meter and
4. in addition to a case when itis entirely read out Anew message is received from the personal computer e A deadlock occurs e The power is turned on again Error Queue The error queue stores the error number when an error occurs For example if the per sonal computer sends an illegal program message the error queue stores error number 102 The contents of the error queue can be read using the STATus ERRor query As with the output queue messages in the error queue are read out on a first in first out basis If the error queue overflows the last error queue is replaced with error number 350 The error queue is emptied in either of the following cases in addition to a case when it is entirely read out The CLS command is received e The power is turned on again Error Code Contents Description and Corrective Measures Error No 102 Syntax Error Syntax error other than the ones listed below 200 Execution Error Cannot execute the command 350 Queue Overflow Read the error queue Limit the length of the program message including the lt PMT gt to the following buffer lengths or less 4 DEADLOCKED a9 Query og Receive buffer length 2048 bytes Send buffer length 50k bytes IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 10 2 6 Communication Commands Click each command CLS for detailed descriptions es TDN Command LP
5. lt Character 3 gt lt Character 4 gt lt Character 5 gt lt Character 6 gt lt Numeric1 gt 1 to 4 Number of system loads lt Character 3 gt to lt Character 6 gt 96036 96033 96030 96031 96032 96034 1 96034 2 96034 3 96035 1 96035 2 Example Commands CLAM 1 96033 Queries CLAM Response Header ON CLAMP 96033 96030 96031 96032 Header OFF 96033 96030 96031 96032 Sets queries whether or not the header of communication output Syntax COMMunicate HEADer lt Boolean gt COMMunicate HEADer Example Commands Queries Response Header ON Header OFF COMM HEAD ON COMM HEAD COMMUNICATE HEADER 1 1 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 24 Sets queries the RS 232 connection destination Syntax CONNect lt Character gt CONNect lt Character gt PC PRINTER Example Commands CONN PC Queries CONN Response Header ON CONNECT PC Header OFF Pc Sets queries the LCD contrast Syntax CONTrast lt Numeric gt CONTrast lt Numeric gt 1 to 8 Example Commands CONT 4 Queries CONT Response Header ON CONTRAST 4 Header OFF 4 Sets queries the CT ratio Syntax CT lt Numeric1 gt lt Numeric2 gt CT Response Header ON cT lt Numeric3 gt lt Numeric4 gt lt Numeric5 gt lt Numeric6 gt Header OFF lt Numeric3 gt lt Numeric4 gt lt Numeric5 gt lt Numeric6 gt lt
6. lt Character string data gt is an arbitrary character string leaving the end single quotation mark or double quotation mark will cause the CW240 to interpret the program message unit as part of the lt character string data gt As a result errors may not be detected properly lt Filename gt lt Filename gt is data that denotes a file name It is expressed in one of the following forms Form Example lt NRf gt lt Character data gt lt Character string data gt 1 CASE CASE e Inthe lt NRf gt form a file name is an ASCIII code obtained by rounding an 8 digit value into an integer for example 1 denotes O0000001 A negative value is not allowed however e Inthe lt character data gt or lt character string data gt form a file name is the first eight characters A response message is always returned in the lt character string data gt form IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 9 2 5 Output Queue and Error Queue Output Queue The output queue is provided to store response messages to queries For example when the MEASure VALUe query is sent to request output of measured data the response data will be stored in the output queue until it is read out Data items are stored in sequence in the output queue and then read out on a first in first out basis The output queue is emptied in any of the following cases
7. 50 Output order ORD lt Numeric5 gt 1 10 100 Output scaling MAG magnification lt Character 6 gt 1K 5K 10K 50K 100K 500K 1MA Electric energy s output rating OUTPUT RATE Example Commands AOUT CH1 1 0 P 1 1 1K Queries AOUT CH1 Response Header ON AOUT CH1 1 0 P 1 1 1K Header OFF 1 0 P 1 1 1K A NOTE e lt Numeric 4 gt to lt Character 6 gt are omitted for normal measurement total harmonics and THD e lt Numeric 4 gt and lt Numeric 5 gt are omitted for electric energy e lt Character 6 gt is omitted for the harmonics level and harmonics content e lt Numeric 5 gt and lt Character 6 gt are omitted for the phase angle of harmonics IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 17 Sets queries the D A output data items CH2 Syntax AOUT CH2 lt Numeric1 gt lt Numeric2 gt lt Character3 gt lt Numeric4 gt lt Numeric5 gt lt Character 6 gt AOUT CH2 lt Numerici gt 1 to 4 Number of system loads lt Numeric2 gt Oto6 0 Normal measurement 1 Electric energy 2 Harmonics level 3 Harmonics content 4 Phase angle of harmonics 5 Total harmonics 6 Total harmonic distortion lt Character 3 gt U1 U2 U3 UAVE I1 1I2 1I3 14 IAVE P Q S PF PA F WH WH VARH VARH U1_3P U2_3P U3_3P UAVE_3P I1_3P 1I2_3P 1I3 3P IAVE 3P P 3P Q 3P S 3P PF 3P PA 3P WH 3P WH _3P VARH 3P VARH 3P U1_1P U2_1P UAVE_1P I1_1P I2_1
8. Current gt lt Frequency gt Value with a physical dimension lt Character data gt Specified character string mnemonic lt Boolean gt Indicates ON OFF Specify with ON OFF or a value lt Character string data gt Arbitrary character string lt Decimal gt lt Decimal gt indicates a value expressed as a decimal number as shown in the table below Decimal values are given in the NR form specified in ANSI X3 42 1975 Symbol Description Example lt NR1 gt Integer 125 1 1000 lt NR2 gt Fixed point number 125 0 90 00 1 lt NR3 gt Floating point number 125 0E 0 9E 1 1E4 lt NRf gt Any of the forms lt NR1 gt to lt NR3 gt is allowed e lt NRf gt represents the case when any of the forms lt NR1 gt to lt NR3 gt can be used The CW240 accepts decimal values from the personal computer in any form The form among lt NR1 gt to lt NR3 gt used for the response message is predetermined for each query The same form is used irrespective of whether the value is large or small e When using lt NR3 gt the after the E can be omitted but the cannot e Ifa value outside the setting range is specified the closest valid value will be used e Ifthe value specified is beyond the precision of the CW240 the value will be rounded lt Voltage gt lt Time gt lt Frequency gt lt Voltage gt lt Time gt and lt Frequency gt indicate deci
9. Numeric1 gt 1 to 4 Number of system loads lt Numeric2 gt 0 01 to 9999 99 CT ratio lt Numeric3 gt CT ratio of 1 system load lt Numeric4 gt CT ratio of 2 system load lt Numeric5 gt CT ratio of 3 system load lt Numeric6 gt CT ratio of 4 system load Example Commands CT 1 2 0 Queries CT Response Header ON CT 2 00 3 00 4 00 5 00 Header OFF 2 00 3 00 4 00 5 00 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 25 Sets queries the current range Syntax CURRent RANGe lt Numeric1 gt lt Character 2 gt CURRent RANGe Response Header ON CURRENT RANGE lt Character 3 gt lt Character 4 gt lt Character 5 gt lt Character 6 gt Header OFF lt Character 3 gt lt Character 4 gt lt Character 5 gt lt Character 6 gt lt Numerici gt 1 to 4 Number of system loads lt Character 2 gt 200MA 500MA 1A 2A 5A 10A 20A 30A 50A 75A 100A 150A 200A 300A 500A 750A 1KA 1 5KA 2KA 3KA lt Character 3 gt Current range of 1 system load lt Character 4 gt Current range of 2 system load lt Character 5 gt Current range of 3 system load lt Character 6 gt Current range of 4 system load Example Commands CURR RANG 1 5A Queries CURR RANG Response Header ON CURRENT RANGE 5A 10A 20A 30A Header OFF 5A 10A 20A 30A IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 26 Sets que
10. Sets queries the VT ratio Syntax VT lt Numeric gt VT lt Numeric gt 0 01 to 9999 99 Example Commands VT 2 0 Queries VT Response Header ON VT 2 00 Header OFF 2 00 Executes clearing of integrated values to zero Syntax WH CLEAr Example Commands WH CLEA Sets queries the position of the decimal point of electric energy Interval of Demand measure mode Syntax WH INTErval DIGIt lt Character gt WH INTErval DIGIt lt Character gt STD 000 000 0000 00 00000 0 000000 AUTO Example Commands WH INTE DIGI STD Queries WH INTE DIGI Response Header ON WH INTERVAL DIGIT STD Header OFF STD Sets queries the unit of electric energy Interval of Demand measure mode Syntax WH INTErval UNIT lt Character gt WH INTErval UNIT lt Character gt MWH WHH KWH MAWH GWH Example Commands WH INTE UNIT KWH Queries WH INTE UNIT Response Header ON WH INTERVAL UNIT KWH Header OFF KWH IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 48 Sets queries the position of the decimal point of electric energy Syntax WH TOTA1 DIGIt lt Character gt WH TOTAL DIGIt lt Character gt STD 000 000 0000 00 00000 0 000000 AUTO Example Commands WH TOTA DIGI STD Queries WH TOTA DIGI Response Header ON WH TOTAL DIGIT STD Header OFF STD Sets queries the unit of electric energy Syntax WH TOTAL
11. UNIT lt Character gt WH TOTAI1 UNIT lt Character gt MWH WH KWH MAWH GWH Example Commands WH TOLA UNIT KWH Queries WH TOTA UNIT Response Header ON WH TOTAL UNIT KWH Header OFF KWH Sets queries the wiring type Syntax WIRIng lt Character gt WIRIng lt Character gt 1P2W 1P3W 1P3W3I 3P3W2I 3P3W31 3P4W 3P3W4I 3P3W 1P3W Example Commands WIRI 1P2W Queries WIRI Response Header ON WIRING 1P2W Header OFF 1P2W IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 49 2 8 Valid Invalid Communication Command Tables The following tables list valid invalid commands in each measurement mode and setting O Indicates the command is valid x Indicates the command is invalid Integration Integration measurement on measurement in standby progress Command Continuous Hold Continuous Hold Continuous Hold CLS IDN 1PCOnnect Publ COnme cia AINP CH1 AINP CH1 AINP CH2 AINP CH2 CH State Integration measurement halted JCH CH4 CH4 ERaging AVERaging BACKlight BACKlight BEEP BEEP CARD DELEte CARD DIREctory CARD DOWNload CARD DOWNload ALL CARD FORMat CARD PICKout CARD SETTing LOAD CARD SETTing SAVE CARD STATe CLAMp CLAMp COMMunicate HEADer COMMunicate HEADer CONNect
12. lt Numeric gt THREShold DIP lt Numeric gt 0 to 100 Example Commands THRE DIP 90 Queries THRE DIP Response Header ON THRESHOLD DIP 90 Header OFF 90 Sets queries the threshold value of momentary voltage interruptions Syntax THREshold INTErruption lt Numeric gt THREShold INTErruption lt Numeric gt 0 to 100 Example Commands THRE INTE 90 Queries THRE INTE Response Header ON THRESHOLD INTERRUPTION 90 Header OFF 90 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 45 Sets queries the threshold value of voltage swells Syntax THREShold SWEL1 lt Numeric gt THREShold SWEL1 lt Numeric gt 0 to 200 Example Commands THRE SWEL 100 Queries THRE SWEL Response Header ON THRESHOLD SWELL 100 Header OFF 100 Sets queries the end of measurement timer setting Syntax TIMEr lt Numerici gt lt Numeric2 gt lt Numeric3 gt TIMEr lt Numeric1 gt Hour data 0 to 8784 lt Numeric2 gt Minute data 0 to 59 lt Numeric3 gt Second data 0 to 59 Example Commands TIME 1 0 0 Queries TIME Response Header ON TIMER 1 0 0 Header OFF 1 0 0 Sets queries whether or not to detect voltage fluctuation voltage quality Syntax VDETect MEASure lt Boolean gt VDETect MEASure Example Commands VDET MEAS ON Queries VDET MEAS Response Header ON VDETECT MEASURE 1 Header OFF 1 IM CW240C
13. sets RS False When the free space is 1536 bytes it sets RS True IM CW240C E 1st Edition Jun 30 2004 lt Chapter 1 RS 232 Communication Function gt Precautions on Data Receive Control 1 6 When the CW240 power meter is controlling receive data by means of a handshake additional data may be sent from the computer even if there is less than 512 bytes of free space in the receive buffer If the receive buffer becomes full all extra data are discarded regardless of the handshake When the receive buffer recovers free space it resumes data storing e 2048 bytes _________ gt J 512 bytes of free space a J Used Used 1536 bytes of free space Used In communication based on handshaking the meter stops receiving data if it cannot transfer data internally fast enough and the buffer s free space becomes less than 512 bytes If the free space increases to 1536 bytes as a result of continuing internal data transfer the meter resumes data receiving Regardless of the handshake all extra data will be discarded if the buffer becomes full Data Receive Control Using Handshaking TIP The program on the personal computer must be designed so that the receive buffers on the meter and the personal computer do not become full IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 1 RS 232 Communication Function gt 1 7 1 4 Matching the Data Format The CW240 uses
14. start stop synchronization to communicate through its RS 232 interface In communication based on start stop synchronization a start bit is added every time a character is transmitted where the start bit is followed by data parity and stop bits see the figure below Return of circuit to idle Idle state of circuit One character state dotted line or detection of the next data s lt Data bits start bit solid line 7 or 8 bits j I I I I I I I I I I I I I I I Stop bit t ee 1 Parity bit Start bit Even odd or none 1 or 2 bits 2 IM CW240C E 1st Edition Jun 30 2004 Blank Page lt Toc gt lt Chapter 2 Communication Commands gt 2 1 2 Communication Commands 2 1 Messages Messages Communication between the CW240 clamp on power meter and a personal computer is carried out in blocks of data called messages Messages sent by the personal computer to the CW240 are called program messages and messages received by the personal com puter from the CW240 are called response messages If a received program message contains a query command a command which requests a response the CW240 returns a response message A single response message is always returned in response to a single program message Program Messages As explained above program messages are sent from the personal computer to the CW240 The format of a program message is shown below lt Program message unit gt lt Program m
15. the computer You can choose from any of the four methods shown in the following table Handshake Methods O means it is a valid selection Data Sending Contro Control of sending data to a computer Data Receiving Control Control of receiving data from a computer Software Handshake Hardware Handshake Handshake method Stops sending OFF OFF when X OFF is received Resumes when X ON is received Stops sending when CB CTS is false Resumes when it is true No handshake Software Handshake Hardware Handshake Sends X OFF when receive data buffer is 3 4 full Sends X ON when receive data buffer is 1 4 full Sets CA RTS to False when receive data buffer is 3 4 full Sets to True when receive data buffer is 1 4 full No handshake XON XON XON RS CS RS The default method is OFF OFF OFF OFF Send Data Control There is no handshake between the meter and the computer The X OFF and X ON signals are treated as data and CS is ignored Receive Data Control There is no handshake between the meter and the computer When the receive buffer is full all extra data are discarded RS is fixed to true IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 1 RS 232 Communication Function gt 1 5 XON XON Send Data Control A software handshake is performed between the meter and the computer If the X OFF c
16. the starting method of integration measurement Syntax STARt METHod lt Character gt STARt METHod lt Character gt MANUAL TIME JUST MANUAL Manual TIME Time JUST Measurement starts at the optimum time for the set interval Example Commands STAR METH TIME Queries STAR METH Response Header ON START METHOD TIME Header OFF TIME Sets queries the date and time of the start of integration measurement Syntax STARt TIME lt year gt lt month gt lt day gt lt hour gt lt min gt STARt TIME Example Commands STAR TIME 2003 8 4 16 20 Queries STAR TIME Response Header ON START TIME 2003 8 4 16 20 Header OFF 2003 8 4 16 20 Queries the error codes that occurred Syntax STATus ERRor Example Queries STAT ERR Response Header ON STAT ERR 0 Header OFF o IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 42 Sets queries the reference standard voltage Syntax STDVoltage lt Numeric gt STDVoltage lt Numeric gt 100 101 110 120 200 202 208 220 230 240 277 346 380 400 480 600 1000 Example Commands STDV 100 Queries STDV Response Header ON STDVOLTAGE 100 Header OFF 100 Stops integration measurement forcibly Syntax STOP EXECute Example Commands STOP EXEC Sets queries the stopping method of integration measurement Syntax STOP METHod MANUAL TIME TIMER STOP METHod lt Charact
17. 4 IAVE P Q S PF PA F WH WH VARH VARH U1_3P U2_3P U3_3P UAVE_3P I1_3P 1I2_3P 1I3 3P IAVE 3P P 3P Q 3P S 3P PF 3P PA 3P WH 3P WH _3P VARH 3P VARH 3P U1_1P U2_1P UAVE_1P I1_1P I2_1P IAVE_1P P_1P Q 1P S_1P PF_1P PA_1P WH 1P WH _1P VARH 1P VARH _1P lt Numeric4 gt 1 to 50 Output order ORD lt Numeric5 gt 1 10 100 Output scaling MAG magnification lt Character 6 gt 1K 5K 10K 50K 100K 500K 1MA Electric energy s output rating OUTPUT RATE Example Commands AOUT CH4 1 0 F 1 1 1K Queries AOUT CH4 Response Header ON AOUT CH4 1 0 F 1 1 1K Header OFF 1 0 F 1 1 1K A NOTE e lt Numeric 4 gt to lt Character 6 gt are omitted for normal measurement total harmonics and THD e lt Numeric 4 gt and lt Numeric 5 gt are omitted for electric energy e lt Character 6 gt is omitted for the harmonics level and harmonics content e lt Numeric 5 gt and lt Character 6 gt are omitted for the phase angle of harmonics IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 20 Sets queries the number of averaging cycles for on screen readings Syntax AVERaging lt Numeric gt AVERaging lt Numeric gt 1 2 5 10 20 Example Commands AVER 5 Queries AVER Response Header ON AVERAGING 5 Header OFF 5 Sets queries the backlight Syntax BACKlight lt Boolean gt BACKlight Example Commands BACK ON Queries BACK Response Head
18. CONNect CON Meacie CONTrast Ser CT CURRent RANGe CURRent RANGe O O X O O O x O O O Xx OC X xO x x XO x O O O O O x O x O x O x O x JO x O x O x OJO OJOJOJOJOJOJOJOJOJOJOJOJO OJOJOJO fOJO JOJOJOJO JOJO JOJO JOJO JOJO JOJO JOJO JOJO JOJO OJO OjO O X O XJOJOJO XJOJOJO X JOJO x JOJO OO JOJO JOJO OJO O x JO x O x JO x JO x JO x JO x JO x JOJO O X O XJOJOJO XJOJOJO X JO X x JO X X x JO x JOJO OJO JO X JO x Oix JO x JO x JO x JO Xx JO x JOJO O X O XJOJOJO XJOJOJO X JO X x JO X X x JO x JOJO JOJO JO x JO x O x JO x JO x JO x JO x JO x JOJO O O X O O O x O O O Xx O X xO x X xO x O O O O O x OI x O x O x O x JO x O x O x OJO IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 50 Integration Integration measurement on measurement in standby progress Command Continuous Hold Continuous Hold Continuous Hold DISPlay MEASure DISPlay MEASure DISPlay MODE DISPlay MODE DOUTput COPY DATAout DOUTput COPY MEDIa DOUTput COPY MEDIa DOUTput ITEM1 DOUTput ITEM1 DOURPUE HE DOUTput Integration measurement halted DOUTput MEDIa DOUTput SAVE DOUTp
19. COnnect AINP AINP AOUT AOUT AOUT AOUT CHI CH2 CH1 CH2 CH3 CH4 AVERaging BACKlight BEEP CARD CARD CARD CARD CARD CARD CARD CARD CARD CLAMp DELEte DIREctory DOWNload DOWNload ALL FORMat PICKout SETTing LOAD SETTing SAVE STATe COMMunicate HEADer CONNect CONTrast Cit CURRent RANGe DISPlay MEASure Description Clears the error queue Queries the meter model Sets queries the destination to which the 1 phase 3 wire component of a 3 phase 3 wire and 1 phase 3 wire system is connected Sets queries the A D input range CH1 Sets queries the A D input range CH2 Sets queries the D A output data items CH1 Sets queries the D A output data items CH2 Sets queries the D A output data items CH3 Sets queries the D A output data items CH4 Sets queries the number of averaging times Sets queries the backlight Sets queries the beep function Deletes the file of PC card Queries the file name of PC card Download from internal memory to PC card Download all the file of internal memory to PC card Formats the PC card Transfers the file from the PC card Loads a setting file from the PC card Saves a setting file to the PC card Queries the PC card status Sets queries the type of clamp Model name of Clamp on Probe Sets queries whether or not the header of communication output Sets queries the
20. CW240C E CD 1st Edition Jun 2004 KP IM CW240C E 1st Edition Jun 30 2004 All Rights Reserved Copyright 2004 Yokogawa M amp C Corporation lt Toc gt lt Rev gt Il E Regarding Protection Safety and Prohibition Against Unauthorized Modification 1 In order to protect the product and the system controlled by it from damage and ensure its safe use make certain that all of the instructions and precautions relating to safety contained in this manual are strictly adhered to Yokogawa M amp C does not guarantee safety if products are not handled according to these instructions S The following safety symbols are used on the product and or in this manual gt Danger Handle with Care This symbol indicates that the operator must refer to an explanation in the user s manual in order to avoid risk of injury or death of personnel or damage to the instru ment A CAUTION Indicates a hazard that may result in an injury to the user and or physical damage to the product or other equipment unless the described instruction is abided by A NOTE Indicates information that is essential for handling the instrument or that should be noted in order to familiarize yourself with the instrument s operating procedures and or functions SEE ALSO Indicates the reference location s for further information on the present topic NOTE Draws attention to information that is essential for understanding the operat
21. E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt Queries detected voltage fluctuation voltage quality values Syntax VDETect VALUe Response Header ON lt Number of detected values gt lt Header gt lt Numeric gt Header OFF lt Number of detected values gt lt Numeric gt lt Number of detected values gt 0 to 100 lt Header gt Same as the header used for saving the detected fluctuation values as files Header item Detected value data Number 1 to 100 Detection date yyyy mm dd Detection time hh mm ss Detection time msec nnn Fluctuation type SWELL DIP INTER lt Numeric gt Wirings other than 3 phase 3 wire and wee 1 phase 3 wire Ea Voltage input P T ETE U1_3P U2_3P U3_3P pnase 3 wire an phase 3 wire U11 P U2 1 P Start end IN OUT Detected RMS voltage V 0 000E 00 Time period hhhh mm ss Time period msec nnn Example Queries VDET VALU Response Header ON 5 NO 1 DATE 2003 08 12 TIME 15 25 00 000 TYPE SWELL Header OFF Sets queries the voltage range Syntax VOLT RANGe lt Numeric gt VOLT RANGe lt Numeric gt 150 300 600 1000 Example Commands VOLT RANG 150 Queries VOLT RANG Response Header ON VOLT RANGE 150 Header OFF 150 5 2003 08 12 15 25 00 000 SWELL IM CW240C E 2 46 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 47
22. Kout lt Filename 1 gt lt Numeric2 gt lt Numeric3 gt lt Filename 1 gt Filename to transfer lt Numeric2 gt Start point lt Numeric3 gt Stop point Response STX 02 Transfers the data ETX 03 Example Queries CARD PICK 240AM000 CSV 1 1000 Response STX 02 CW240 ETX 03 Returns the data of 240AMO000 CSV file 1 byte to 1000 bytes A NOTE To execute this command specify the RS 232 handshake settings between the CW240 and a personal computer to CS RS beforehand Loads a setting file from the PC card Syntax CARD SETTing LOAD lt Character gt lt Character gt Character data of up to 8 alphanumeric character Example Commands CARD SETT LOAD 240MC000 Saves a Setting file to the PC card Syntax CARD SETTing SAVE lt Character gt lt Character gt Character data of up to 8 alphanumeric character Example Commands CARD SETT SAVE 240MC000 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 23 Queries the PC card status Syntax CARD STATe Response 1 The PC card is set 0 The PC card is not set Example Queries CARD STAT Response Header ON CARD STATE 1 Header OFF 1 Sets queries the type of clamp Model name of Clamp on Probe Syntax CLAMp lt Numeric1 gt lt Character 2 gt CLAMp Response Header ON CLAM lt Character 3 gt lt Character 4 gt lt Character 5 gt lt Character 6 gt Header OFF
23. LEte MEMOry SETTing FORMat MEMOry SETTing LOAD MEMOry SETTing SAVE OPERationvar Integration measurement halted OPERationvar ORDEY ORDEY RESEt SAMPling SAMPling SOURcCe SOURCE STARt EXECute STARt METHod STARt METHod STARt TIME S Ss ARt TIME TATus ERRor STDVoltage STDVoltage STOP EXECute STOP METHod S1 METHod STOP TIME S1 TIME SYST sabe THD THREshold DIP THREShold DIP THREshold INTErruption THREShold INTErruption THREShold SWEL1 THREShold SWEL1 TIMEr TIMEr OJOJOJOJOJOJOJOJOJOJOJOIO JOJO JOJOJO x JOJO JOJO JOJO JOJO JOJO JOJO JOJO JOJO JOJO OJO OJO OJsO O XIO XOX JO XJO X O XJO X JO xX JO X x JO Xx O x JO x JO x JO X IOI x XJO XJO X JO xX JO lOO OJO OIXIOIXIOIXIOIXIOIXIOIXIOIXIOIxXIOIxX JOJO X JOLX JO X JO X JO X JO X 1K JO XK JO XIX X X XK JO x JO O XK O KO X O K O xk OxI OxI OxI oix x JO xO x O x O x JO x O x xX oOx oxi xix xix OxI O KIO KIO KIO KIO XIO XKIO KIO K O K O O x O x O x JO x JO x O x K O K JO X x X x KIO K O Ol OR ORS OR OB ORC OR Che x IO x xO xO x lt x xix OxI oxi lt x Be x BORO IM CW240C E 1st Edition Ju
24. M CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 15 Sets queries the A D input range CH1 Syntax AINP CH1 lt Character gt AINP CH1 lt Character gt 100MV 1V 5v Example Commands AINP CH1 100MV Queries AINP CH1 Response Header ON AINP CH1 100MV Header OFF 100MV Sets queries the A D input range CH2 Syntax AINP CH2 lt Character gt AINP CH2 lt Character gt 100MV 1v 5v Example Commands AINP CH2 100MV Queries AINP CH2 Response Header ON AINP CH2 100MV Header OFF 100Mv IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 16 Sets queries the D A output data items CH1 Syntax AOUT CH1 lt Numeric1 gt lt Numeric2 gt lt Character3 gt lt Numeric4 gt lt Numeric5 gt lt Character 6 gt AOUT CH1 lt Numerici gt 1 to 4 Number of system loads lt Numeric2 gt Oto6 0 Normal measurement 1 Electric energy 2 Harmonics level 3 Harmonics content 4 Phase angle of harmonics 5 Total harmonics 6 Total harmonic distortion THD lt Character 3 gt U1 U2 U3 UAVE I1 1I2 1I3 14 IAVE P Q S PF PA F WH WH VARH VARH U1_3P U2_3P U3_3P UAVE_3P I1_3P 1I2_3P I3 3P IAVE 3P P 3P Q 3P S 3P PF 3P PA 3P WH 3P WH _3P VARH 3P VARH _3P U1_1P U2_1P UAVE_1P I1_1P I2_1P IAVE_1P P_1P Q 1P S 1P PF_1P PA_1P WH 1P WH _1P VARH 1P VARH _1P lt Numeric4 gt 1 to
25. MEMORY lt Filename 2 gt Old filename lt Filename 3 gt New filename Example Commands FILE CHAN CARD 240AM000 CSV MEASURE CSV IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 32 Sets queries a filename of measurement date Syntax FILEname MEASure lt Character gt FILEname MEASure lt Character gt Character data of up to 8 alphanumeric character Description When lt Character gt is omitted the filename is cleared Example Commands FILE MEAS 240AM000 Queries FILE MEAS Response Header ON FILENAME MEASURE 240AM000 Header OFF 240AM000 Sets queries the low pass filter for frequency source Syntax FILTer lt Boolean gt FILTer Example Commands FILT ON Queries FILT Response Header ON FILTER 1 Header OFF 1 Sets queries the measurement frequency Syntax FREQuency lt Numeric gt FREQuency lt Numeric gt 50 60 Example Commands FREQ 50 Queries FREQ Response Header ON FREQUENCY 50 Header OFF 50 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 33 Sets queries the display holding status Syntax HOLD lt Boolean gt HOLD Example Commands HOLD ON Queries HOLD Response Header ON HOLD 1 Header OFF 1 Sets queries the calcutational method Syntax HPA lt Numeric gt HPA lt Numeric gt 0 1 0 Fundamental wave FUNDAME WAVE 1 U1 Exampl
26. OPY DATA Sets queries the saving and printing destination for on screen data Syntax DOUTput COPY MEDIa lt Character gt DOUTput COPY MEDIa lt Character gt PRINTER CARD MEMORY Example Commands DOUT COPY MEDI CARD Queries DOUT COPY MEDI Response Header ON DOUTPUT COPY MEDIA CARD Header OFF CARD IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 28 Sets queries group 1 of output data items Syntax DOUTput ITEM1 lt Numeric gt DOUTput ITEM1 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 lt Numeric gt ae Total Phase Harmonics Harmonics Ntegration Normal harmonics 209e of content level ane chai al harmonics demand ment Example Commands DOUT ITEM1 1 Queries DOUT ITEM1 Response Header ON DOUTPUT ITEM1 1 Header OFF 1 Sets queries group 2 of output data items Syntax DOUTput ITEM2 lt Numeric gt DOUTput ITEM2 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bito lt Numeric gt Minimum Maximum Average Stantane value value value ole MIN MAX AVE UNTER Example Commands DOUT ITEM2 15 Queries DOUT ITEM2 Response Header ON DOUTPUT ITEM2 15 Header OFF 15 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 29 Sets queries group 3 of output data items
27. P IAVE_1P P_1P Q 1P S_1P PF_1P PA_1P WH 1P WH _1P VARH 1P VARH _1P lt Numeric4 gt 1 to 50 Output order ORD lt Numeric5 gt 1 10 100 Output scaling MAG magnification lt Character 6 gt 1K 5K 10K 50K 100K 500K 1MA Electric energy s output rating OUTPUT RATE Example Commands AOUT CH2 1 0 Q 1 1 1K Queries AOUT CH2 Response Header ON AOUT CH2 1 0 0 1 1 1K Header OFF 1 0 Q 1 1 1K A NOTE e lt Numeric 4 gt to lt Character 6 gt are omitted for normal measurement total harmonics and THD e lt Numeric 4 gt and lt Numeric 5 gt are omitted for electric energy e lt Character 6 gt is omitted for the harmonics level and harmonics content e lt Numeric 5 gt and lt Character 6 gt are omitted for the phase angle of harmonics IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 18 Sets queries the D A output data items CH3 Syntax AOUT CH3 lt Numeric1 gt lt Numeric2 gt lt Character3 gt lt Numeric4 gt lt Numeric5 gt lt Character 6 gt AOUT CH3 lt Numerici gt 1 to 4 Number of system loads lt Numeric2 gt Oto6 0 Normal measurement 1 Electric energy 2 Harmonics level 3 Harmonics content 4 Phase angle of harmonics 5 Total harmonics 6 Total harmonic distortion lt Character 3 gt U1 U2 U3 UAVE I1 1I2 1I3 14 IAVE P Q S PF PA F WH WH VARH VARH U1_3P U2_3P U3_3P UAVE_3P I1_3P 1I2_3P I3 3P IA
28. RMAN FRENCH ITALIAN SPANISH Example Commands Queries Response Header ON LANG JAPANESE LANG LANGUAGE JAPANESE Header OFF JAPANESE Sets queries the number of system loads Syntax LOAD lt Numeric gt LOAD lt Numeric gt 1 to 4 Example Commands Queries Response Header ON Header OFF LOAD 1 LOAD LOAD 1 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 36 Queries the state of integration measurement Syntax MEASure STATe Response lt Numeric gt 0 1 2 0 Halted 1 On standby 2 In progress Example Queries MEAS STAT Response Header ON MEASURE STATE 0 Header OFF 0 Queries the date and time of the actual start of integration measurement Syntax MEASure TIME STARt Response Header ON MEASURE TIME START lt year gt lt month gt lt day gt lt hour gt lt min gt lt sec gt Header OFF lt year gt lt month gt lt day gt lt hour gt lt min gt lt sec gt Example Queries MEAS TIME STAR Response Header ON MEASURE TIME START 2003 8 4 17 0 0 Header OFF 2003 8 4 17 0 0 Queries the date and time of the actual stop of integration measurement Syntax MEASure TIME STOP Response Header ON MEASURE TIME STOP lt year gt lt month gt lt day gt lt hour gt lt min gt lt sec gt Header OFF lt year gt lt month gt lt day gt lt hour gt lt min gt lt sec g
29. RS 232 connection destination Sets queries the LCD contrast Sets queries the CT ratio Sets queries the current range Sets queries measurement data items of display IM CW240C E 1st Edition Jun 30 2004 lt Toc gt Click each command for detailed descriptions cm Command DISPlay MODE DOUTput COPY DATAout DOUTput COPY MEDIa DOUTput ITEM1 DOUTput ITEM2 DOUTput ITEM3 DOUTput ITEM4 DOUTput ITEMS DOUTput MEDIa DOUTput SAVE DOUTput WAVE FILEname CHANge FILEname MEASure JEM TREN FREQuency HOLD HPA HYSTeresis ID INTErval KLOCKk LANGuage LOAD MEASure STATe MEASure TIME START MEASure TIME STOP MEASure VALUe MEMOry DIREctory 2 11 lt Chapter 2 Communication Commands gt Description Sets queries the mode of display Saves on screen data as with the COPY key Sets queries the saving and printing destination for on screen data Sets queries group 1 of output data items Sets queries group 2 of output data items Sets queries group 3 of output data items Sets queries group 4 of output data items Sets queries group 5 of output data items Sets queries the saving destination for output data items Saves measurement data as with the SAVE key Sets queries the state of the saving function for waveform data files Changes queries a filename Sets queries a filename of measurement date Sets quer
30. Rt EXECute STARt METHod STARt TIME When Concatenating Commands of the Same Group The CW240 stores information on which hierarchical level the command currently being executed belongs to and performs analysis on the assumption that the next command will also belong to the same level Therefore you may omit the header of the next command if the two commands belong to the same group Example STARt METHod TIME TIME 2003 8 12 18 21 lt PMT gt When Concatenating Commands of Different Groups Include a colon before the header if the following command does not belong to the same group as the preceding command Example STARt METHod TIME STOP METHod TIME lt PMT gt When Concatenating Common Commands Common commands defined in IEEE 488 2 1987 are independent of hierarchy Acolon is not necessary before a common command Example STARt METHod TIME CLS TIME 2003 8 12 18 21 lt PMT gt When Separating Commands with lt PMT gt If a terminator is used to separate two commands each command is a separate message Specify the command header for each command even when the com mands from the same command group are being concatenated Rules of Header Interpretation The CW240 interprets a received header according to the following rules Mnemonics are not case sensitive Example SySTemcan also be written as system or System The lower case portion of a header can be omitted Example SySTemcan also be written as SYSTE or SYST
31. User s Manual CW240 CLAMP ON POWER METER Communication Functions IM CW240C E D YOKOGAWA IM CW240C E Yokogawa M amp C Corporation 1st Edition lt Toc gt lt Rev gt l Introduction This user s manual is applicable to the CW240 clamp on power meter and provides information necessary for using communication functions and creating communication programs For details on the function or how to operate the CW240 see the IM CW240 E user s manual CW240 Clamp on Power Meter Precautions for Safe Use of the Instrument E Regarding This User s Manual 1 This manual should be provided to the end user Keep this manual in a safe place 2 Read this manual carefully to gain a thorough understanding of how to operate this product before you start using it 3 This manual is intended to describe the functions of this product Yokogawa M amp C Corporation hereinafter simply referred to as Yokogawa M amp C does not guarantee that these functions are suited to the particular purpose of the user 4 The contents of this manual may not be transcribed or reproduced in part or whole without prior permission G The contents of this manual are subject to change without prior notice Every effort has been made to ensure accuracy in the preparation of this manual Should any errors or omissions come to your attention however please contact your nearest Yokogawa M amp C representative or our sales office Media No IM
32. VE 3P P 3P Q 3P S 3P PF 3P PA 3P WH 3P WH _3P VARH 3P VARH _3P U1_1P U2_1P UAVE_1P I1_1P I2_1P IAVE_1P P_1P Q 1P S 1P PF_1P PA_1P WH 1P WH _1P VARH 1P VARH _1P lt Numeric4 gt 1 to 50 Output order ORD lt Numeric5 gt 1 10 100 Output scaling MAG magnification lt Character 6 gt 1K 5K 10K 50K 100K 500K 1MA Electric energy s output rating OUTPUT RATE Example Commands AOUT CH3 1 0 S8 1 1 1K Queries AOUT CH3 Response Header ON AOUT CH3 1 0 S 1 1 1K Header OFF 1 0 S 1 1 1K A NOTE e lt Numeric 4 gt to lt Character 6 gt are omitted for normal measurement total harmonics and THD e lt Numeric 4 gt and lt Numeric 5 gt are omitted for electric energy e lt Character 6 gt is omitted for the harmonics level and harmonics content e lt Numeric 5 gt and lt Character 6 gt are omitted for the phase angle of harmonics IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 19 Sets queries the D A output data items CH4 Syntax AOUT CH4 lt Numeric1 gt lt Numeric2 gt lt Character3 gt lt Numeric4 gt lt Numeric5 gt lt Character 6 gt AOUT CH4 lt Numerici gt 1 to 4 Number of system loads lt Numeric2 gt Oto6 0 Normal measurement 1 Electric energy 2 Harmonics level 3 Harmonics content 4 Phase angle of harmonics 5 Total harmonics 6 Total harmonic distortion lt Character 3 gt U1 U2 U3 UAVE I1 1I2 1I3 1
33. bit7 bit6 bit5 bit4 bit3 bit2 bit1 bitO lt NUMENCS gt aei order 31th 30th 29th 28th 27th 26th 25th N m bit7 bit6 bit5 bit4 bit3 bit2 bit1 bitO SINUMENCO M oth order 39th 38th 37th 36th 35th 34th 33th N 7 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 lt NUMErIC gt gth order 47th 46th 45th 44th 43th 42th 41th N ic8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bitO EES EE 50th order 49th Example Commands DOUT ITEMS 0 255 255 255 255 255 255 255 3 Queries DOUT ITEMS Response Header ON DOUTPUT ITEMS5 0 255 255 255 255 255 255 255 3 Header OFF 0 255 255 255 255 255 255 255 3 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 31 Sets queries the saving destination for output data items Syntax DOUTput MEDIa lt Character gt DOUTput MEDIa lt Character gt CARD MEMORY Example Commands DOUT MEDI CARD Queries DOUT MEDI Response Header ON DOUTPUT MEDIA CARD Header OFF CARD Saves measurement data as with the SAVE key Syntax DOUTput SAVE Example Commands DOUT SAVE Sets queries the state of the saving function for waveform data files Syntax DOUTput WAVE lt Boolean gt DOUTput WAVE Example Commands DOUT WAVE ON Queries DOUT WAVE Response Header ON DOUTPUT WAVE 1 Header OFF 1 Changes queries a filename Syntax FILEname CHANge lt Character 1 gt lt Filename 2 gt lt Filename 3 gt lt Character 1 gt CARD
34. e Commands HPA 0 Queries HPA Response Header ON HPA 0 Header OFF o Sets queries the hysteresis factor in percentage Syntax HYSTeresis lt Numeric gt HYSTeresis lt Numeric gt 0 to 10 Example Commands HYST 10 Queries HYST Response Header ON HYSTERESIS 10 Header OFF 10 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt Sets queries the ID number Syntax ID lt Numeric gt ID lt Numeric gt 1 to 999 Example Commands ID 1 Queries ID Response Header ON ID 1 Header OFF 1 Sets queries the interval 2 34 Syntax INTErval lt Character gt INTErval lt Character gt WAVE 0 1S 0 2S 0 5S 1S 2S 5S 10S 15S 1M 2M 5M 10M 15M 30M 1H WAVE 1 Single waveform 0 1S 100msec 0 2S 200msec 0 5S 500msec 1S 1sec 2S 2sec 5S 5sec 10S 10sec 15S 15sec 1M 1min 2M 2min 5M 5min 10M 10min 15M 15min 30M 30min 1H Lhour Example Commands INTE 1S Queries INTE Response Header ON INTERVAL 1S Header OFF 1S IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 35 Sets queries the keylock function Syntax KLOCk lt Boolean gt KLOCK Example Commands Queries Response Header ON Header OFF Sets queries the language Syntax LANGuage lt Character gt LANGuage KLOCK ON KLOCK KLOCK 1 1 lt Character gt JAPANESE ENGLISH GE
35. e response message units each response message unit corresponds to one response Each response unit is separated by a semicolon lt RMT gt RMT is a terminator used to terminate each response message For the CW240 the terminator is a string of CR ASCIll code ODH and LF ASCll code OAH characters Format of Response Message Unit The format of a response message unit is shown below lt Response header gt Space lt Response data gt lt Response header gt It is possible to program the CW240 so a response header precedes the response data Response data is separated from the header by a space lt Response data gt Response data contains the contents of the response If there are multiple data they are separated by a comma If a program message contains multiple queries the responses are made in the same order as the queries For most queries the CW240 returns only one response message unit The CW240 returns more than one response message unit to some queries however The first query is always answered with the first response message unit However the nth query does not always agree with the nth response message unit To be certain that the given response message unit corresponds to the correct query place one query in each program message Precautions when Exchanging Messages You can send the next message at any time if the previously sent message did not contain any quer
36. eeenensesnees 2 10 2 7 Detailed Description of Communication Commands s sssssssseunnunnenennen 2 14 2 8 Valid Invalid Communication Command Tables ccssecessseeesscees 2 49 Revision Information IM CW240C E 1st Edition Jun 30 2004 Blank Page lt Toc gt lt Chapter 1 RS 232 Communication Function gt 1 1 1 RS 232 Communication Function 1 1 RS 232 Interface Specifications Receiving Function With this function you can make settings via an RS 232 communication interface in basi cally the same way as you do with the panel keys Sending Function With this function you can output setup data measured data and error codes via the RS 232 communication interface RS 232 Interface Specifications Electrical and Mechanical characteristics Conforms to EIA RS 232 Connection Communication Synchronization Baud rate Start bit Data length Parity Stop bit Connector Hardware handshake Software handshake Receive buffer length Send buffer length Point to point Full duplex Start stop synchronization 1200 2400 4800 9600 19200 and 38400 bps 1 bit fixed 7 or 8 bits Even odd or none 1 or 2 bits 9 pin D sub For CA RTS and CB CTS signals a selection can be made as to whether the signals are always logically true or are used as control line signals Flow control can be carried out using X ON and X OFF codes X ON ASCII 11H X OFF ASCII 13H 2048 by
37. er ON BACKLIGHT 1 Header OFF 1 Sets queries the beep function Syntax BEEP lt Boolean gt BEEP Example Commands BEEP ON Queries BEEP Response Header ON BEEP 1 Header OFF 1 Deletes the file of PC card Syntax CARD DELEte lt Filename gt Example Commands CARD DELE 240AM000 CSV IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 21 Queries the file name of PC card Syntax CARD DIREctory lt Character gt lt Character gt MEAS INST WAVE SET ALM BMP MEAS Measurement file INST Short interval file WAVE Waveform file SET Setting file ALM Detected voltage fluctuation file Voltage quaity BMP Screen file Hard copy Response lt Filename gt lt Size gt Example Queries CARD DIRE MEAS Response 240AM000 1024 Downloads from internal memory to PC card Syntax CARD DOWNload lt Filename 1 gt lt Filename 2 gt lt Filename 1 gt Filename of internal memory lt Filename 2 gt Filename to save of the PC card Example Commands CARD DOWN 240AM000 CSV 240AM999 CSV Downloads all the files of internal memory to PC card Syntax CARD DOWNload ALL Example Commands CARD DOWN ALL Formats the PC card Syntax CARD FORMat Example Commands CARD FORM IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 22 Transfers the file from the PC card Syntax CARD PIC
38. er gt MANUAL TIME TIMER MANUAL Manual TIME Time TIMER Timer Example Commands STOP METH TIME Queries STOP METH Response Header ON STOP METHOD TIME Header OFF TIME IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 43 Sets queries the date and time of the stop of integration measurement Syntax STOP TIME lt year gt lt month gt lt day gt lt hour gt lt min gt STOP TIME Example Commands STOP TIME 2003 8 4 16 20 Queries STOP TIME Response Header ON STOP TIME 2003 8 4 16 20 Header OFF 2003 8 4 16 20 Sets queries the date Syntax SYSTem DATE lt year gt lt month gt lt day gt SYSTem DATE Example Commands SYST DATE 2003 8 4 Queries SYST DATE Response Header ON SYSTEM DATE 2003 8 4 Header OFF 2003 8 4 Sets queries the time Syntax SYSTem TIME lt hour gt lt min gt lt sec gt SYSTem TIME Example Commands SYST TIME 16 50 0 Queries SYST TIME Response Header ON SYST TIME 16 50 0 Header OFF 16 50 0 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 44 Sets queries the method of Total Harmonic Distortion Syntax THD lt Character gt THD lt Character gt F R F THD F R THD R Example Commands THD F Queries THD Response Header ON THD F Header OFF F Sets queries the threshold value of voltage dips Syntax THREshold DIP
39. essage unit gt lt Program message unit gt lt PMT gt lt Program message unit gt A program message is a train of one or more program message units each unit corre sponds to one command The CW240 executes the commands in the order that they are received Each program unit is separated by a semicolon lt PMT gt PMT is a terminator used to terminate each program message For the CW240 the termi nator is a string of CR ASCll code ODH and LF ASCll code OAH characters Format of Program Message Unit The format of a program message unit is shown below lt Program header gt Space lt Program data gt lt Program header gt The program header contains the command type lt Program data gt If there are certain conditions for executing a command they are appended as program data The program data follows the program header and is separated from the program header by a space ASCIl code 20H If there are multiple data they are separated by a comma IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 2 Response Messages As explained earlier response messages are sent by the CW240 to the personal computer The format of a response message is shown below lt Response message gt lt Response message gt lt Response message gt lt RMT gt lt Response message unit gt A response message is a train of one or mor
40. ic character Example Commands MEMO SETT SAVE 240MC000 SET Sets queries whether the reactive power method is set to ON or OFF Syntax OPERationvar lt Boolean gt OPERationvar Example Commands OPER ON Queries OPER Response Header ON OPERATIONVAR 1 Header OFF 1 Sets queries the order of harmonics bar graphs to display Syntax ORDEr lt Character gt ORDEY lt Character gt ALL ODD ALL All orders ODD Odd Example Commands ORDE ALL Queries ORDE Response Header ON ORDER ALL Header OFF ALL IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 40 Resets the system Syntax RESEt Example Commands RESE Sets queries the sampling method Syntax SAMP1 ing lt Character gt SAMPLing lt Character gt PLL FIX PLL PLL FIX Fixed clock Example Commands SAMP PLL Queries SAMP Response Header ON SAMPLING PLL Header OFF PLL Sets queries the frequency source Syntax SOURce lt Character gt SOURCe lt Character gt U1 U2 U3 U1 Voltage input terminal 1 U2 Voltage input terminal 2 U3 Voltage input terminal 3 Example Commands SOUR U1 Queries SOUR Response Header ON SOURCE U1 Header OFF U1 Starts integration measurement Syntax STARt EXECute Example Commands STAR EXEC IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 41 Sets queries
41. ies e Ifthe previous program message contained a query you cannot send the next mes sage until the entire response message is received If you send the next program message before any response message is received or after only part of a message is received an error will occur The response message that was not received at all or completely will be discarded e Ifthe personal computer tries to receive a response message when there is none an error will occur An error also occurs if the personal computer tries to receive a re sponse message before it finishes sending the program message e faprogram message contains multiple units and some of the units are incomplete the CW240 will pick up the incomplete units and attempt to execute them These attempts may not always be successful however In addition even if the program message contained queries they may not always be responded to IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 3 Deadlock The CW240 has receive and send buffers for storing program and response messages The receive buffer has a capacity of 2048 bytes and the send buffer can store 50 kbytes The number of bytes available will vary depending on the operating conditions of the CW240 If both buffers become full at the same time the CW240 becomes inoperative This condition is called a deadlock To resume normal operation discard response mes sages Adeadlock will no
42. ies the low pass filter for frequency source Sets queries the measurement frequency Sets queries the display holding status Sets queries the calcutational method Sets queries the hysteresis factor in percentage Sets queries the ID number Sets queries the interval Sets queries the keylock function Sets queries the language Sets queries the number of system loads Queries the state of integration measurement Queries the date and time of the actual start of integra tion measurement Queries the date and time of the actual stop of integra tion measurement Queries measurement values Queries the file name of internal memory IM CW240C E 1st Edition Jun 30 2004 lt Toc gt Click each command for detailed descriptions em MEMOry MEMOry MEMOry MEMOry MEMOry MEMOry Command FORMat PICKout SETTing DELEte SETTing FORMat SETTing LOAD SETTing SAVE OPERationvar ORDEYT RESEt SAMPling SOURCe STARt EXECute STARt METHod STARt TIME STATus ERRor STDVoltage STOP EXECute STOP METHod STOP TIME SYSTem DATE SYSTem TIME THD THREShold DIP THREShold INTErruption THREShold SWEL1 TIMEr VDETect MEASure 2 12 lt Chapter 2 Communication Commands gt Description Formats data files on internal memory Transfers the file from internal memory Deletes a setting file from internal memory Formats setting f
43. iles on internal memory Loads a setting file from internal memory Saves a setting file to internal memory Sets queries whether the reactive power method is set to ON or OFF Sets queries the order of harmonics bar graphs to display Resets the system Sets queries the sampling method Sets queries the frequency source Starts integration measurement Sets queries the starting method of integration measurement Sets queries the date and time of the start of integration measurement Queries the error codes that occurred Sets queries the reference standard voltage Stops integration measurement forcibly Sets queries the stopping method of integration measurement Sets queries the date and time of the stop of integration measurement Sets queries the date Sets queries the time Sets queries the method of Total Harmonic Distortion Sets queries the threshold value of voltage dips Sets queries the threshold value of momentary voltage interruptions Sets queries the threshold value of voltage swells Sets queries the end of measurement timer setting Sets queries whether or not to detect voltage fluctuation voltage quality IM CW240C E 1st Edition Jun 30 2004 lt Toc gt Click each command for detailed descriptions em Command VDETect VALUe VOLT RANGe i VI WH CLEAr WH INTErval DIGIt WH INTErval UNIT WH TOTA1 DIGIt WH TOTA UNIT WIRIng lt Chapter 2 Communication C
44. ion and or features of the product E Description of Displays 1 Some of the representations of product displays shown in this manual may be exag gerated simplified or partially omitted for reasons of convenience when explaining them 2 Figures and illustrations representing the controller s displays may differ from the actual displays in regard to the positions and or indicated characters upper case or lower case for example to the extent that they do not impair correct understanding of the functions and the proper operation and monitoring of the system IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Rev gt E Force Majeure 1 2 3 GS Yokogawa M amp C does not make any warranties regarding the product except those mentioned in the WARRANTY that is provided separately Yokogawa M amp C assumes no liability to any party for any loss or damage direct or indirect caused by the use of the product or any unpredictable defect of that Be sure to use spare parts approved by Yokogawa M amp C when replacing parts or consumables Modification of the product is strictly prohibited Reverse engineering such as the disassembly or decompilation of software is strictly prohibited No portion of the product supplied by Yokogawa M amp C may be transferred exchanged leased or sublet for use by any third party without the prior permission of Yokogawa M amp C IM CW240C E 1st Edition Jun 30 2004 lt I
45. mal values which have a physical dimension lt Multiplier gt or lt Unit gt can be attached to the lt NRf gt form The values are specified in any of the following forms Form Example lt NRf gt lt Multiplier gt lt Unit gt 5MV lt NRf gt lt Unit gt 5E 3V lt NRf gt lt Multiplier gt 5M lt NRf gt 5E 3 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 7 lt Multiplier gt The following multipliers are available Symbol Word Description EX Exa 1018 PE Peta 1015 T Tera 1012 G Giga 109 MA Mega 108 K Kilo 10 M Mili 10 U Micro 10 N Nano 10 P Pico 1012 F Femto 1015 lt Unit gt The following units are available Symbol Word Description V Volt Voltage A Ampere Current HZ Hertz Frequency KHZ Kilohertz Frequency e lt Multiplier gt and lt Unit gt are not case sensitive e U is used to indicate uw e MA is used for Mega M to distinguish it from Mili If used for current however MA is interpreted as Milliampere To refer to Megaampere write as MAA e If both lt Multiplier gt and lt Unit gt are omitted the default unit V A or Hz will be used e Response messages are always expressed in the lt NR3 gt form The default unit is used without the lt Multiplier gt or the lt Unit gt lt Character Data gt lt Charac
46. mats data files on internal memory Syntax MEMOry FORMat Example Commands MEMO FORM Transfers the file from internal memory Syntax MEMOry PICKout lt Filename 1 gt lt Numeric2 gt lt Numeric3 gt lt Filename 1 gt A filename to transfer lt Numeric2 gt Start position lt Numeric3 gt Stop position Response STX 02 Transferred data ETX 03 Example Queries MEMO PICK 240AM000 CSV 1 1000 Response STX 02 CW240 ETX 03 Returns the data of 240AM000 CSV file 1 byte to 1000 bytes A NOTE To execute this command specify the RS 232 handshake settings between the CW240 and a personal computer to CS RS beforehand Deletes a setting file from internal memory Syntax MEMOry SETTing DELEte lt Character gt lt Character gt Character data of up to 8 alphanumeric character Example Commands MEMO SETT DELE 240MCO000 SET Formats setting files on internal memory Syntax MEMOry SETTing FORMat Example Commands MEMO SETT FORM IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 39 Loads a setting file from internal memory Syntax MEMOry SETTing LOAD lt Character gt lt Character gt Character data of up to 8 alphanumeric character Example Commands MEMO SETT LOAD 240MC000 SET Saves a setting file to internal memory Syntax MEMOry SETTing SAVE lt Character gt lt Character gt Character data of up to 8 alphanumer
47. n 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 52 Integration Integration measurement on measurement in standby progress Command Continuous Hold Continuous Hold Continuous Hold VDETect MEASure VDETect MEASure VDETect VALUe VOLT RANGe VOLT RANGe Integration measurement halted CLEAr INTErval DIGIt INTErval DIGIt INTErval UNIT INTErval UNIT TOTA1 DIGIt WH TOTA DIGIt WH TOTA UNIT SWH TOTA1 UNIT WIRIng WIRIng OJOJOJOJOJOJOJO OJOJOJO JOJO OJOjOjO O X O XJO X JO X JO X X JO X IO XO O x OI xO xIOIxIOIxIOIxIxXIOIXIOIXIOIOI x OI xIOIxIOIxIOIxIOIxIxXIOIXIOIXIOIOI x IM CW240C E 1st Edition Jun 30 2004 lt Int gt lt Toc gt l Revision Information Title CW240 CLAMP ON POWER METER Communication Functions Manual Manual No IM CW240C E Jun 2004 1st Edition Newly published Written by Yokogawa M amp C Corporation Yokogawa M amp C Corporation Published by Yokogawa M amp C Corporation 2 9 32 Nakacho Musashino shi Tokyo 180 8750 JAPAN IM CW240C E 1st Edition Jun 30 2004
48. nt gt lt Rev gt Toc 1 CW240 CLAMP ON POWER METER Communication Functions IM CW240C E 1st Edition CONTENTS Aniigele lD Leil olp paaa E E E E E i Precautions for Safe Use of the INStrument ccccsesseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees i 1 RS 232 Communication Function s ssnsssssssssnunnnnnnnnnnnnnnnnnnnnnnnn nnana A1 1 1 1 RS 232 Interface Specifications ccceccesccesssesseeeeeeeeeeeeeseeeeeseeseseeesseeeeeees A1 1 1 2 Connecting CW240 through RS 232 Interface cssccseeeseeeeeeeeseeneteeeee A1 2 1 3 Handshake Methods cssccseeeeeeeceeeeeenneneaeeeeeeeeeaeneeeeeeeeeeeeeeeneeneeeeseeeensees A1 4 1 4 Matching the Data Format sccccseeceeeeeeeeeeeeeeseeenneeseenneeseeeseesesesneeseeeenes A1 7 2 Communication COMMANAS ccccccceeeeeeeeeeeeeeeeeeeeeseseeeeeeeeeeeeeeeeeees 2 1 2 1 Messages ascssceecisws cate tidi saeicaes seteemeds cue denescecetmceceetwuea deck euvcaceateumevecebeuivecciuunes 2 1 2 2 COMMIMANNGSS iis cost oi cia castes ceca nc ence ece canst tev caseeictaeest etecnezenntuewsd aaetevenaeieewes Sutteves 2 3 2 3 RESPONSE essa ae ee ESSE so eS ee ee ee Ee eo eS oe ee oes 2 5 2 4 Data aco oS sesh aaaea dechade cuedeh vanes tas aae ces tetuey eonescu aa ea aA Saa Kaaa SaO Kaena 2 6 2 5 Output Queue and Error QUEUE ssssssssnsnunnnnnnennnnnnnnnnnnnnnunnnnnnnnnnnnnnnnnnnnnn nunna 2 9 2 6 Communication CommandS cccssecccessseeeeseeeeeenseeeeeenseseeeeese
49. ode is received when data is being sent to the computer the meter stops sending data When it receives the next X ON code it resumes data sending The CS signal from the computer is ignored Receive Data Control A software handshake is performed between the meter and the computer When there is 512 bytes of free space in the receive buffer the meter sends an X OFF code When the free space is 1536 bytes it sends an X ON code RS is fixed to true XON RS Send Data Control A software handshake is performed between the meter and the computer If the X OFF code is received when data is being sent to the computer the meter stops sending data When it receives the next X ON code it resumes data sending The CS signal from the computer is ignored Receive Data Control A hardware handshake is performed between the meter and the computer When there is 512 bytes of free space in the receive buffer the meter sets RS False When the free space is 1536 bytes it sets RS True CS RS Send Data Control A hardware handshake is performed between the meter and the computer If CS becomes False when data is being sent to the computer the meter stops sending data When CS becomes True it resumes data sending The X ON and X OFF are treated as data Receive Data Control A hardware handshake is performed between the meter and the computer When there is 512 bytes of free space in the receive buffer the meter
50. ommands gt 2 13 Description Queries detected voltage fluctuation voltagequality values Sets queries the voltage range Sets queries the VT ratio Executes clearing of integrated values to zero Sets queries the position of the decimal point of electric energy Interval of Demand measure mode Sets queries the unit of electric energy Interval of Demand measure mode Sets queries the position of the decimal point of electric energy Sets queries the unit of electric energy Sets queries the wiring type IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 14 2 7 Detailed Description of Communication Commands Clears the error queue Syntax CLS Example Commands CLS Queries the meter model Syntax IDN Response lt Character string 1 gt lt Character string 2 gt lt Numeric3 gt lt Character string 4 gt lt Character string 1 gt Manufacturer YOKOGAWA lt Character string 2 gt Model CW240 lt Numeric3 gt Serial No 0 always 0 lt Character string 4 gt Firmware version F1 00 Example Queries IDN Response YOKOGAWA CW240 0 F1 00 Sets queries the destination to which the 1 phase 3 wire component of a 3 phase 3 wire and 1 phase 3 wire system is connected Syntax 1PCOnnect lt Character gt LPConnect lt Character gt R S S T T R Example Commands 1PCO R S Queries 1PCO Response Header ON 1PCONNECT R S Header OFF R S I
51. ries the data items of display Syntax Example DISPlay MEASure lt Numeric1 gt lt Numeric2 gt lt Numeric3 gt DISPlay MEASure lt Numerici gt 0O List LIST lt Numeric2 gt lt Numeric3 gt Commands Queries 1 Detailed Power POWER 2 Electric energy INTEGRATE 3 Demand DEMAND 4 Expanded view ZOOM 5 Harmonics list LIST 6 Harmonics graph GRAPH 7 Vector harmonics VECTOR 8 Voltage and current waveform U amp l WAVEFORM 9 Voltage waveform U WAVEFORM 10 Current waveform I WAVEFORM 11 Voltage fluctuation VOLT QUALITY 12 Wiring diagram WIRING DIAG 13 Wiring check WIRING CHECk 1 to 4 Number of system loads 0 Instantaneous value INTER 1 Average value AVE 2 Maximum value MAX 3 Minimum value MIN DISP MEAS 0 1 0 DISP MEAS Response Header ON DISPLAY MEASURE 0 1 0 Header OFF 0 1 0 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 27 Sets queries the mode of display Syntax DISPlay MODE lt Character gt DISPlay MODE lt Character gt TOP MEAS SET FILE TOP Top menu TOP MENU MEAS Measurement mode MEASURE SET Setting mode SET UP FILE File mode FILE Example Commands DISP MODE MEAS Queries DISP MODE Response Header ON DISPLAY MODE MEAS Header OFF MEAS Saves on screen data as with the COPY key Syntax DOUTput COPY DATAout Example Commands DOUT C
52. t Example Queries MEAS TIME STOP Response Header ON MEASURE TIME STOP 2003 8 4 17 0 0 Header OFF 2003 8 4 17 0 0 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 37 Queries measurement values Syntax MEASure VALUe Response Header ON lt Header gt lt Numeric gt Header OFF lt Numeric gt Outputs text of the items specified by the DOUTput ITEM lt x gt command lt Header gt Same as the header used for saving the detected fluctuation values as files Date yyyy mm dd Time hh mm ss lt Numeric gt Elapsed Time or Elapsed Period hhhhh mm ss Electric energy 1 23456E 00 Data other than electric energy 1 234E 00 Example Queries MEAS VALU Response Header ON DATE 2003 08 12 TIME 15 25 00 ETIME 00 01 00 U1_INST V 1 000H 02 Header OFF 2003 08 12 15 25 00 00 10 00 1 000H 02 Queries the file name of internal memory Syntax MEMOry DIREctory lt Character gt lt Character gt MEAS INST WAVE SET ALM BMP MEAS Measurement file INST Short interval file WAVE Waveform file SET Setting file ALM Detected voltage fluctuation file Voltage quality BMP Screen file Hard copy Response lt Filename gt lt Size gt Example Queries MEMO DIRE MEAS Response 240AM000 1024 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 38 For
53. t occur however if the size of the program message including the lt PMT gt is kept below the number of bytes above A deadlock never occurs if no query is included in the program message 2 2 Commands Commands There are two types of command program header that can be sent from the personal computer to the CW240 They differ in the format of their program headers Common Command Header Commands defined in IEEE 488 2 1987 are called common commands The header format of a common command is shown below An asterisk always precedes a common command lt Mnemonic gt lt Mnemonic gt Compound Header Commands other than common commands that are dedicated to the CW240 are classi fied and arranged in a hierarchy according to their functions The format of a compound header is shown below A colon is used to specify a lower level header lt Mnemonic gt lt Mnemonic gt lt Mnemonic gt lt Mnemonic gt lt Mnemonics gt lt Mnemonic gt Simple Header Asimple header is a functionally independent command with no hierarchical structure The format of a simple header is shown below lt Mnemonic gt lt Mnemonic gt IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 4 When Concatenating Commands Command Group Agroup of commands which share the same compound header is called a command group Acommand group may contain sub groups Example STA
54. ter data gt is a data of specific characters mnemonic It is mainly used to indicate options and is chosen from character strings given in For interpretation rules see Rules of Header Interpretation Form Example U1 U2 U3 U1 IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 8 lt Boolean gt lt Boolean gt is a type of data that indicates ON or OFF and is expressed in one of the following forms Form Example ON OFF lt NRF gt ON OFF 10 e When expressing lt Boolean gt in lt NRf gt form OFF is selected if the rounded integer value is 0 and ON is selected if the rounded integer is non 0 e Aresponse message is always 1 if the value is ON and 0 if it is OFF lt Character String Data gt lt Character string data gt is an arbitrary character string unlike the lt character data gt which uses only specific characters The character string must be enclosed in single quotation marks or double quotation marks Form Example lt Character string data gt ABC IEE488 2 1987 e Ifacharacter string contains a double quotation mark use two double quotation marks to indicate it This rule also applies to a single quotation mark within a character string e Response messages always use double quotation marks around the character string Since
55. tes 50k bytes IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 1 RS 232 Communication Function gt 1 2 1 2 Connecting CW240 through RS 232 Interface When connecting the CW240 to a computer make sure the methods used for handshake data transmission rate and data format are the same on both the CW240 and the computer For details see the following pages Also be sure to use interface cables that match the specifications of the CW240 Connector and Signal Names 1 23 4 5 6 7 Pin 2 Pin 3 Pin 5 Pin 7 Pin 8 8 9 RD Receive Data Data received from the personal computer Signal direction Input SD Send Data Data transmitted to a personal computer Signal direction Output SG Signal Ground Ground for signals RS Request to Send Signal used for handshake when receiving data from a personal computer Signal direction Output CS Clear to Send Signal used for handshake when transmitting data to a personal computer Signal direction Input Pins 1 4 6 and 9 are not used IM CW240C E 1st Edition Jun 30 2004 lt Toc gt Signal Direction lt Chapter 1 RS 232 Communication Function gt 1 3 The figure below shows the directions of the signals used by the RS 232 interface of the CW240 RS Request to Send CS Clear to Send SD Send Data Computer RD Receive Data Pin No 9 pin connector Description 5 Signal Ground
56. ut WAVE DOUTput WAVE Ename CHANge LEname MEASure Ename MEASure FILTer FILTer FREQuency FREQuency HOLD HOLD HPA HYSTeresis HYSTeresis a0 21D INTErval INTErval KLOCk KLOCk LANGuage LANGuage LOAD LOAD MEASure STATe MEASure TIME START MEASure TIME STOP MEASure VALUe OJOJOJOJOJOJOJOJOJOJOJOJO OJOJOJO OJOJOJOJOJO JOJO JOJO JOJO OJOJOJO JOJO JOJO JOJO OJOJOJO JOJO JOJO JOJO OJOJOJOJO X IO XJOJOJO X JO XO XO X OlOJO X JO X JO OJO JO X JOJO JO X JO XK JO X JO XO XK Ox IOIO OOO O O O O O X O X O O O xI OC Xj OIX OIXIOIOI OIX OXI OIX xO xxO X O XO XK Oxx OxI OxI x OJO O O OJOJOJOJO XIJO XJOJOJO XIO XIO XIO XIO JOJO X I OIX OIX Ix JO x XO XJO XJO XJO XIO X O X O X x JOJO OJO O O O O O X O XI O O OxI OXI OC XO X O O O O X O X xO xxO xI OxI OxI OxI Ox OxI Oxx OOOO OIOIOIOIOIX Ox OIOIOIXx IOIxX OIxXIOIx IOIO Ox JO X IO Xx x Oxx OIX OIx OIxIOIx OIxIO x OIxXIx IOIO IOIO IM CW240C E 1st Edition Jun 30 2004 lt Toc gt lt Chapter 2 Communication Commands gt 2 51 Integration Integration measurement on measurement in standby progress Command Continuous Hold Continuous Hold Continuous Hold DIREctory FORMat PICKout MEMOry SETTing DE

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