Omega Vehicle Security Stud Sensor DMD 480 S2 User Manual

PHONE:(203)359-1600 1-800-TCOMEGA FAX:(203)359-7700 [email protected]  
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2.1  
4500.BAS  
PROGRAM  
USER’S MANUAL  
DMD-480-S2Series  
ACPOWEREDBRIDGESENSOR  
RS232INTERFACE  
 
D M D - 4 8 0 - S 2 S E R I E S A C P O W E R E D B R I D G E S E N S O R - R S 2 3 2 I N T E R F A C E  
DMD-480-S2 Series  
USER’S MANUAL  
PREOPERATION  
A.  
DMD-480-S2 SERIES HOOK-UP  
(REFERTOFIGURE1ANDTABLE1FORSCREWTERMINALDESIGNATION)  
FIGURE 1  
1.  
2.  
CONNECT AC TO SCREW TERMINALS 5 AND 6 OF THE DMD-480-S2  
SERIES TERMINAL BLOCK.  
USING A ONE TO ONE DB9 CABLE, CONNECT ONE END TO YOUR  
COMPUTERS SERIAL PORT, (COM1 OR COM2 ONLY), AND THE OTHER  
END TO THE DMD-480-S2 SERIES FEMALE DB9 CONNECTOR.  
THE RECOMMENDED MAXIMUM CABLE LENGTH IS 50 FT. WHICH IS  
DETERMINED BY THE MAXIMUM SPECIFIED CABLE CAPACITANCE  
OF 2500pF.  
TABLE 1  
TERMINAL  
FUNCTION  
+INPUT  
1
2
3
4
5
6
-INPUT  
3.  
4.  
CONNECT THE STRAIN GAGE OUTPUT TO THE DMD-480 SERIES ± INPUT,  
TERMINALS 1 AND 2 OF THE DMD-480-S2 SERIES TERMINAL BLOCK.  
TERMINAL 1= +INPUT, TERMINAL 2= -INPUT.  
-EXCITATION  
+EXCITATION  
AC  
AC  
CONNECT THE STRAIN GAGE +EXCITATION INPUT TO THE DMD-480  
SERIES TERMINAL BLOCK, TERMINAL 4, AND THE STRAIN GAGE -  
EXCITATION INPUT TO TERMINAL 3.  
DMD-480-S2 Series Block Diagram  
One Omega Drive, P.O. Box 4047  
Stamford, CT 06907  
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D M D - 4 8 0 - S 2 S E R I E S A C P O W E R E D B R I D G E S E N S O R - R S 2 3 2 I N T E R F A C E  
TABLE 3: ADDRESS EXAMPLES  
B.  
DMD-480-S2SERIES DIP SWITCH SETTINGS  
1.  
SET THE DESIRED ADDRESS FOR EACH UNIT BY SETTING  
SWITCHES 1-6.  
BY SETTING THIS ADDRESS, THE UNIT IS GIVEN ITS OWN IDENTITY TO  
WHICH THE HOST COMPUTER WILL IDENTIFY WITH.  
ADDRESS 63  
• THE ADDRESS RANGE IS FROM 0 - 63 (DECIMAL) OR  
111111 (BINARY). (REFER TO EXAMPLES IN TABLE 3).  
• SWITCH “ON” = 0; SWITCH “OFF” = 1  
2.  
SET THE DESIRED MODE OF OPERATION FOR THE 4570-232 USING  
SWITCHES 7 & 8.  
BINARY = 111111  
DECIMAL = 1 + 2 + 4 + 8 + 16 + 32 = 63  
(REFER TO TABLE 2 FOR DEFINING MODES OF OPERATIONS)  
ADDRESS  
1
MODE 3 IS USED FOR DIAGNOSTIC PURPOSES.  
TABLE 2:  
SW 7 SW 8 MODE  
DESCRIPTION  
BINARY = 100000  
DECIMAL = 1 + 0 + 0 + 0 + 0 + 0 = 1  
OPERATE MODE: Operate Mode: Unit Outputs a reading  
ON  
ON  
ON  
0
whenever it is addressed by the the host computer.  
TEST MODE: Unit outputs a reading every 0.33 seconds  
continuously without being addressed  
ADDRESS 21  
OFF  
1
2
3
ON OFF  
OFF OFF  
UNDEFINED:  
TEST MODE: Unit outputs a message " MODE 3: Version: 941124  
Address: 01" continuously.  
BINARY = 101010  
DECIMAL = 1 + 0 + 4 + 0 + 16 + 0 = 21  
C.  
SOFTWARE INSTALLATION  
SWITCH  
DECIMAL VALUE  
THE SUPPLIED OMEGA SOFTWARE, C4500.BAS, IS INTENDED FOR  
USER MODIFICATION. PLEASE FEEL FREE TO MAKE ANY CUSTOM  
MODIFICATIONS TO THE SOFTWARE AS NEEDED. IT IS RECOMMENDED  
THAT THE USER MAKE A BACKUP COPY OF THE ORIGINAL OMEGA  
SOFTWAREBEFOREMODIFYING.  
1
2
3
4
5
6
1
2
4
8
16  
32  
1.  
2.  
TO EXECUTE THE OMEGA C4500 SOFTWARE, QBASIC OR GWBASIC  
MUST BE LOADED ON YOUR COMPUTER.  
TO BEGIN THE SOFTWARE SETUP, YOU MUST LOAD AND EXECUTE  
THE SUPPLIED OMEGA PROGRAM, “C4500.BAS” WITHIN QBASIC OR  
GWBASIC.  
D.  
SETUP MENU  
THE FIRST MENU TO APPEAR IS THE “SETUP MENU”  
IF YOU WANT TO SAVE ANY SETTINGS WHICH WILL BE ENTERED INTO THE  
PROGRAM, YOU WILL WANT TO ENTER THOSE SETTINGS DIRECTLY INTO THE  
SOFTWARE AND SAVE THE SOFTWARE WITH AN APPLICATION NAME  
(XXXXX.BAS). AFTER YOU QUIT THE OPERATION MENU OR TURN OFF THE HOST  
COMPUTER, ALL SETTINGS WILL RETURN TO THEIR DEFAULT VALUES UNLESS  
SAVED.  
PHONE:(203)359-1660 FAX:(203)359-7700  
1-800-TC OMEGA  
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D M D - 4 8 0 - S 2 S E R I E S A C P O W E R E D B R I D G E S E N S O R - R S 2 3 2 I N T E R F A C E  
THE SETUP MENU ALLOWS THE USER TO SETUP THE CORRECT  
OPERATING PARAMETERS FOR THE DMD-480-S2 SERIES.  
1.  
2.  
OPTION 0 [RETURN TO OPERATION MENU]:  
SELECTING THIS OPTION WILL RETURN YOU TO THE OPERATION MENU.  
OPTION 1 [SELECT COMMUNICATIONS PORT]:  
THIS OPTION ALLOWS THE SELECTION OF EITHER COM1 OR COM2  
AS THE COMMUNICATIONS PORT FOR THE DMD-480-S2 SERIES AND THE  
USERS COMPUTER. COM3 AND COM4 ARE NOT ALLOWED.  
THE SETTING OF THE COMMUNICATIONS PORT IS ALWAYS NECESSARY  
FOR PROPER OPERATION OF THE DMD-480-S2 SERIES IN BOTH THE  
OPERATION AND TEST MODES.  
3.  
OPTION 2 [SET SCALING EQUATION]:  
THIS OPTION ALLOWS THE USER TO SELECT COEFFICIENTS OF A  
SCALING EQUATION. THE SCALING EQUATION PROVIDES FOR BOTH A  
SCALE FACTOR (A) AND A FIXED OFFSET (C).  
THE SCALING EQUATION IS: VALUE = C + (A x READING)  
THE SETTING OF THE SCALING EQUATION ONLY APPLIES TO THE  
“OPERATION MODE”.  
(REFER TO SECTION F FOR A DESCRIPTION ON SETTING THE  
SCALING EQUATION.)  
4.  
OPTION 3 [SELECT DATA DESTINATION]:  
THIS OPTION ALLOWS THE USER TO STORE DATA IN ONE OF 3 MODES.  
THE DATA MAY BE DISPLAYED ON THE COMPUTER SCREEN ONLY, SENT  
TO A FILE ONLY, OR BOTH.  
THIS OPTION APPLIES ONLY TO THE “OPERATION MODE”.  
(REFER TO SECTION G FOR MORE INFORMATION ON STORING DATA.)  
OPTION 4 [DATA COLLECTION METHOD]:  
5.  
THIS OPTION ALLOWS THE USER TO COLLECT DATA IN 3 DIFFERENT  
WAYS AND ONLY APPLIES TO THE OPERATE MODE, NOT THE TEST  
MODE.  
1) TAKE A READING EVERY “Y” SECONDS, WHERE “Y” IS ONE  
SECOND MINIMUM, FOR A TOTAL “A” MINUTES.  
2) START TAKING DATA EVERY “Y” SECONDS AT TIME “A” UNTIL  
TIMEB”.  
3) TAKE DATA EVERY “Y” SECONDS STARTING NOW AND  
CONTINUE READING DATA FOREVER. THIS IS THE DEFAULT  
METHOD FOR THE OPERATE MODE.  
BY DEFAULT, THE VALUE FOR “Y” MUST BE 1 SECOND.  
One Omega Drive, P.O. Box 4047  
Stamford, CT 06907  
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D M D - 4 8 0 - S 2 S E R I E S A C P O W E R E D B R I D G E S E N S O R - R S 2 3 2 I N T E R F A C E  
6.  
OPTION 5 [SELECT UNITS TO MONITOR]:  
THE LAST OPTION SELECTS THE ADDRESS OF THE MODULES TO  
BE MONITORED IN THE ORDER IN WHICH THEY ARE TO BE MONITORED.  
ADDRESSES FROM 0 TO 63 MAY BE SELECTED.  
THE DEFAULT ADDRESS IS “1”.  
E.  
OPERATION MENU  
THE “OPERATION MENU”, ALLOWS 4 USER CHOICES.  
OPTION 0 [QUIT]:  
1.  
2.  
ALLOWS THE USER TO QUIT THE PROGRAM.  
OPTION 1 [SETUP THE UNITS]:  
EXECUTES THE “SETUP MENU”, WHICH ALLOWS THE USER TO  
SET ADDRESSES TO INTERROGATE, MEASUREMENT RATE, ETC.  
REGARDLESS OF WHETHER THE “TEST MODE” OR “OPERATION MODE”  
IS SELECTED, CERTAIN PARAMETERS MUST ALWAYS BE ENTERED IN  
THE SETUP UNITS OPTION IN ORDER FOR YOUR MEASUREMENT  
SYSTEM TO OPERATE PROPERLY.  
(REFER TO SECTION D FOR SETUP MENU DESCRIPTION)  
OPTION 2 [START OPERATE MODE]:  
3.  
4.  
WILL EXECUTE THE OPERATE MODE IF THE DMD-480-S2 SERIES HAS  
BEEN SET FOR MODE 0 (SW7 AND SW8 “ON”).  
OPTION 3 [START TEST MODE]:  
WILL EXECUTE THE TEST MODE IF THE DMD-480-S2 SERIES HAS BEEN  
SET FOR MODE 1 OR 3.  
PRIOR TO ENTERING THE OPERATE MODE, IT WILL BE NECESSARY TO HAVE THE  
CORRECT UNIT ADDRESSED, AND IN MOST CASES IT WILL BE NECESSARY TO  
ENTER THE SETUP MENU AND SET THE SCALING EQUATION, DATA  
DESTINATION, AND DATA COLLECTION METHOD.  
IT IS RECOMMENDED THAT THE USER OPERATE THE UNIT IN TEST MODE 3 PRIOR  
TO THE OPERATE MODE TO ENSURE THAT THE UNIT IS COMMUNICATING  
PROPERLY. THE USER CANNOT ADDRESS MULTIPLE UNITS IN THE TEST MODE,  
THEREFORE EACH UNIT MUST BE TESTED INDIVIDUALLY.  
F.  
SETTING THE SCALING EQUATION  
THE SCALING EQUATION IS SET BY WRITING THE EQUATION FOR THE TWO  
CONDITIONS OF ZERO AND SPAN, AND THEN SOLVING FOR THE CONSTANTS.  
THE DMD-480-S2 HAS AN OUTPUT OF APPROXIMATELY 41,750 COUNTS FULL  
SCALE. IF THE MODULE WERE TO BE USED AS A VOLTAGE OUTPUT UNIT AND  
THE SPAN WERE TO BE 30 mV, THEN THE FOLLOWING CALCULATION WOULD BE  
MADE.  
PHONE:(203)359-1660 FAX:(203)359-7700  
1-800-TC OMEGA  
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D M D - 4 8 0 - S 2 S E R I E S A C P O W E R E D B R I D G E S E N S O R - R S 2 3 2 I N T E R F A C E  
1. APPLY 3 mV TO THE INPUT AND READ THE 10%  
DIGITAL COUNTS AS THE OUTPUT (K1).  
2. APPLY 30 mV TO THE INPUT AND READ THE FULL SCALE  
DIGITAL COUNTS AS THE OUTPUT (K2)  
3. WRITETWOEQUATIONS:  
A) (K2 x A) + C = 0.030 VOLTS  
B) (K1 x A) + C = 0.003 VOLTS  
SUBTRACTING EQUATION B FROM A:  
(K2 - K1) x A = 0.027 VOLTS  
THEREFORE  
SOLVING FOR  
EXAMPLE 1:  
A = 0.027 VOLTS ÷ (K2 - K1)  
C , C = -K1 x A  
WITH 3 mV APPLIED THE DMD-483-S2 OUTPUT  
READS 4185 COUNTS.  
WITH 30 mV APPLIED THE DMD-483-S2 OUTPUT  
READS 41,745 COUNTS.  
A) (41,745 x A) + C = 0.030 VOLTS  
B) (4185 x A) + C = 0.003 VOLTS  
SOLVING EQUATION A - EQUATION B  
(37,560 x A) = 0.027 VOLTS. THEREFORE  
A = (0.027 ÷ 37,560) = 7.1885 x 10-7 = .00000071885  
SOLVING FOR C, C = .003 - (K1 x A)  
C = -8.38 x 10-6 = .00000838  
VERIFY YOUR RESULTS BY PLACING YOUR SOLUTIONS BACK INTO  
EQUATIONS A AND B:  
A) (41,745 x .00000071885) - .00000838 = 0.030 VOLTS  
B) (4185 x .00000071885) - .00000838 = 0.003 VOLTS  
IN A WEIGHING APPLICATION USING A LOAD CELL WITH A SENSITIVITY OF 3mV/V,  
THE CONSTANT C WOULD THEN CORRESPOND TO THE TARE WEIGHT OF THE  
SYSTEM.  
EXAMPLE 2:  
WITH THE TARE WEIGHT ONLY APPLIED, READ  
1,500 COUNTS.  
WITH A FULL LOAD OF 100 POUNDS APPLIED, READ ABOUT  
41,745 COUNTS.  
A) (41,745 x A) + C = 100 POUNDS  
B) (1,500 x A) + C = 0 POUNDS  
One Omega Drive, P.O. Box 4047  
Stamford, CT 06907  
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D M D - 4 8 0 - S 2 S E R I E S A C P O W E R E D B R I D G E S E N S O R - R S 2 3 2 I N T E R F A C E  
SOLVING EQUATION A - EQUATION B  
A = (100 ÷ 40,245) = .00248478  
SOLVING FOR C, C = -1,500 x .00248478, C = -3.727  
VERIFY YOUR RESULTS BY PLACING YOUR SOLUTIONS BACK INTO  
EQUATIONS A AND B:  
A) (41,745 x 0.00248478) + (-3.727) = 100.000 LBS  
B) (1,500 x 0.00248478) + (-3.727) = 0.000 LBS  
ONE COUNT = .00248 POUNDS  
G.  
WRITING DATA TO A FILE  
UNDER OPTION 3 OF THE SETUP MENU, THE COLLECTED DATA MAY BE  
WRITTEN TO A FILE SELECTED BY THE USER. THE USER MUST GIVE A FILE NAME  
AND A PATH, (DRIVE:\PATH\FILE). THE DATA RECORDED IN THE FILE IS  
RECORDED IN THE FOLLOWING MANNER: UNIT NUMBER (ADDRESS), DATE, TIME,  
UNSCALED READING, AND THE SCALED READING. AN EXAMPLE OF A FILE’S  
CONTENTS IS SHOWN BELOW.  
1 , “07-30-1993” , “09:30” , 30003 , 10.0000  
2 , “07-30-1993” , “09:30” , 15000 , 5.00190  
3 , “07-30-1993” , “09:30” , 00015 , 0.00999  
1 , “07-30-1993” , “09:31” , 30003 , 10.0000  
2 , “07-30-1993” , “09:31” , 10000 , 3.33633  
3 , “07-30-1993” , “09:31” , 00100 , 0.03831  
NOTICE THAT THE DATA IS DELIMITED BY COMMAS AND QUOTE MARKS, WHICH  
IS A STANDARD METHOD FOR WRITING TO FILES SO THAT ANY POPULAR  
SPREADSHEET AND DATABASE PROGRAM CAN READ THE COLLECTED DATA.  
A
DISK THAT IS COLLECTING DATA INTO A FILE WILL CONTINUE TO COLLECT DATA  
UNTIL IT IS FILLED UP, AT WHICH TIME AN ERROR MESSAGE WILL APPEAR  
INDICATING THE DISK IS FULL.  
PHONE:(203)359-1660 FAX:(203)359-7700  
1-800-TC OMEGA  
M-3281  
8
C4500.BAS V2.1 December 21, 1994  
 

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