1103mu4X35-1 WEIGHT 4X35 Standard Manual UK PDF
Contents
1. Eilersen Industrial Sensors 4X35 User manual 9 4 3 IEEE754 floating point format 32 bit Representation of data on IEEE754 floating point format is done as follows Bytel Byte2 Byte3 Byte4 bit7 bit6 bitO bit7 bit6 bitO bar bitO bar bitO Sign Exponent Mantissa Mantissa Mantissa Formula Value 1 2 amp xponent 127 z 14 Mantissa Example Bytel Byte2 Byte3 Byte4 01000000 1111 0000 0000 0000 0000 0000 Value 1 20710 1 21 4274 2 7 5 Please note that if transfer of MSB first has been selected default setting the byte with the sign will come first in the weight indications and if LSB first has been selected the byte with the sign will come last in the weight indications Version 2008 09 04 rev 1 Page 262. cali bration of the loadcells remains unchanged If the Reset calibration bit is activated all calibration factors system and all loadcell factors will be set to their standard value of 32768 If the Clear error in Error register bit is activated any error in the Error register will be cleared Version 2008 09 04 rev 1 Page 7 Eilersen Industrial Sensors 4X35 User manual STW handling During communication from slave the weight to the master the first two bytes in the PCD part are used as a Status Word STW By reading the Status Word STW it is possible for the master to achieve information on the status of the slave the weight The functionality of the individual bits in the Status Word STW is described below BIT NO FUNCTION 0 LC error Reserved for future use Zeroing OK Zeroing not possible Calibration OK Calibration not possible Reset Calibration OK Clear Error OK Reserved for future use Error detected If the LC error bit is ON one or more loadcells detected at power up are in an error state The actual error can be read in the Status for loadcell X register for the individual loadcell If the Zeroing OK bit is ON the last zero request has been performed Note that the bit is cleared during the zero process and after the Zero system bit is cleared again If the Zero not possible bit is ON the last zero request has not been performed The reason for this can be read in the Ze
3. code will be transferred in the PVA element The following error indications are possible ERROR CAUSE Illegal PNU 1 Reserved for future use 2 Upper or lower limit is exceeded Version 2008 09 04 rev 1 Page 6 Eilersen Industrial Sensors 4X35 User manual 3 3 PCD Description As mentioned the PCD part of the telegram is made up of a CTW STW part and a MRV MAV part The functionality of the PCD parts is described here Note that the PCD part the last 6 bytes always transfers these data independent of the contents of the PCV part the first 8 bytes CTW handling During communication from the master to the slave the weight the first two bytes in the PCD part is used as a Control Word CTW By use of the Control Word CTW it is possible to tell the slave the weight how it should react as different commands can be transferred to the weight The bit s in CTW have the following function If the Zero system bit is activated all loadcells and thereby the calculated system weight will be zeroed This should only be done with an empty weighing arrangement If the Calibrate corner bit is activated the loadcell specified by the Corner register will be calibrated to the weight indicated by the Calibration load for corner system register If the Calibrate system bit is activated the system weight will be calibrated to the weight indicated by the Calibration load for corner system register Note that the individual
4. further information on these formats 9 4 1 Unsigned integer format 16 bit The following are examples of decimal numbers represented on 16 bit unsigned integer format Decimal Hexadecimal Binary MSB first 0 0x0000 00000000 00000000 1 0x0001 00000000 00000001 2 0x0002 00000000 00000010 200 0x00C8 00000000 11001000 2000 0x07D0 00000111 11010000 20000 0x4E20 01001110 00100000 9 4 2 Signed integer format 32 bit The following are examples of decimal numbers represented on 32 bit signed integer for mat Decimal Hexadecimal Binary MSB first 20000000 OxFECED300 11111110 11001110 11010011 00000000 2000000 OxFFE17B80 11111111 11100001 01111011 10000000 200000 OxFFFCF2CO 11111111 11111100 11110010 11000000 20000 OxFFFFB1E0 11 10110001 11100000 2000 OxFFFFF830 11111 11111000 00110000 200 OxFFFFFF38 111 11111111 00111000 2 OxFFFFFFFE Mr A Vri TO 1 OxFFFFFFFF Pl TT HE a 0 0x00000000 00000000 00000000 00000000 00000000 1 0x00000001 00000000 00000000 00000000 00000001 2 0x00000002 00000000 00000000 00000000 00000010 200 0x000000C8 00000000 00000000 00000000 11001000 2000 0x000007D0 00000000 00000000 00000111 11010000 20000 0x00004E20 00000000 00000000 01001110 00100000 200000 0x00030D40 00000000 00000011 00001101 01000000 2000000 0x001E8480 00000000 00011110 10000100 10000000 20000000 0x01312D00 00000001 00110001 00101101 00000000 Version 2008 09 04 rev 1 Page 25
5. the resolution of the load cell weighing result as follows Exponent Exponent Conversion factor SI unit Decimal Hexadecimal to gram 3 OxFFFD 10 mg 2 OxFFFE 10 1 OxFFFF 10 0 0x0000 100 gram 1 0x0001 10 2 0x0002 10 3 0x0003 10 Kg 4 0x0004 10 5 0x0005 10 6 0x0006 10 ton Version 2008 09 04 rev 1 Page 13 Eilersen Industrial Sensors 4X35 User manual Status for loadcell X is a register containing the actual status for loadcell X The meaning of the status code can be found in the STATUS CODES chapter Actual gross weight for loadcell X contains the actual gross weight for loadcell X The gross weight is the actual load signal for the loadcell adjusted by zero and calibration factor Note that the value is a value averaged over 200 ms Actual signal for loadcell X contains the actual signal for loadcell X The actual signal is the actual load signal for the loadcell without any adjustment fir zero and calibration factor Note that the value is a value averaged over 200 ms Actual zero for loadcell X contains the actual zero value for loadcell X The value is deter mined during zero from Actual signal for loadcell X Corner calibration factor for loadcell X contains the calibration factor for loadcell X The value is determined during calibration of corner X and lies in the interval 24576 40960 with 32768 as center value s
6. the 9 pole Sub D connector PROFIBUS MUST be powered by a separate 24VDC that has NO connection to the ATEX approved 24VDC from the above mentioned 4051A power supply Version 2008 09 04 rev 1 Page 19 Eilersen Industrial Sensors 4X35 User manual 8 2 2 Connection of loadcells The loadcells must be connected to the available BNC connectors in the front panel of the 4X35 system unit The loadcells are connected starting with the connector marked 1 and continuing onwards in rising order Thus if three loadcells are to be connected they should be connected to the BNC connectors marked 1 2 and 3 8 2 3 Profibus DP connector The front panel of the 4X35 system unit is equipped with a nine pole female sub D connec tor with a standard Profibus DP interface This allows for direct connection to a Profibus DP network using standard Profibus DP connectors Termination of the Profibus should take place in the sub D connector male of the cable The specific terminals in the connec tor have the following function TERMINALS FUNCTION 1 Not used Not used RS485 A positive line Siemens designation B line Request to Send RTS 0 VDC Gnd 5VDC Vout Not used RS485 B negative line Siemens designation A line Not used O CO uI Alal EI G il N Note that some companies use different designations for the RS485 A and the RS485 B lines Therefore the polarity of
7. D Not used Reserved for future use PNU Parameter number Values 0 999 RC Request Response Characteristics The RC part is used by the master to tell the slave the weight what requests are wanted Similarly the RC part is used by the slave to tell response the master the status results of the received requests The RC part further informs which other parts of the PCV IND and PVA are used The contents of the RC part has the following function during request REQUEST FUNCTION Request parameter value Change parameter value 2 bytes Change parameter value 4 bytes Reserved for future use Version 2008 09 04 rev 1 Page 5 Eilersen Industrial Sensors 4X35 User manual The contents of the RC part has the following function during response RESPONSE FUNCTION No response Transfer parameter value 2 bytes PNU Parameter number Bit 10 to Bit 0 in the PCA part indicates the parameter number of the parameter to be read changed The individual parameters and their function is explained later PVA handling The PVA part contains 4 bytes for reception and transmission of parameter values The PVA part will transfer 2 byte parameters in either bytes 7 8 MSB first selected or bytes 5 6 LSB first selected 4 byte parameters are transferred in bytes 5 8 If the slave the weight refuses a request from the master the RC part will assume the value 3 see above and the actual error
8. Eilersen Industrial Sensors Applies for Cygnal no Document no Date Rev Kokkedal Industripark 4 DK 2980 Kokkedal Denmark info eilersen com Tel 45 49 180 100 Fax 45 49 180 200 4X35 PROFIBUS DP SYSTEM Standard weight function for digital loadcells WEIGHT 051103 1 1103mu4X35 1 DOC 2008 09 04 1 Eilersen Industrial Sensors 4X35 User manual 1 CONTENTS D CONTENTS ebe Ee ee 2 NET 3 2 1 kl e EE 3 22 Profibus DP Specification ease 3 2 3 Upd te Ende ERE E a E Ea a eiaei 3 3 DATA EXCHANGE piesien AE E E RE 4 3 1 Profibus DP communication using PPO eseseeeseseessesreseesresresrrseresressesrresressreeresresseseresrenseseese 4 3 2 PCV BR 5 3 3 PCD DSS Cri pty a ies ce setae eat etebaeeteccc eves sireeni it e esea E EKAS AEE EEES E Einsi EES 7 4 PARAMETER E KEE 10 4 1 Parameter E 10 5 PARAMETER DESCRIPTION sunne 12 3 1 Parameter Pee 12 6 DATA PROCESSING EN 15 ee 15 FEN 15 DINSTALA TION OF SYSTEM EE 17 TA Ch klist d rine installation eee deras 17 5 HARDWARE DESCRIPTION RE 19 SL AXIS F RE 19 0 2 4X35 OR Panel d s ripton EE 19 GN NR e Tee E 19 5 22 Connection oe 20 5 2 3 Profibus DP oe seen 20 9 2 4 SWI E e 20 FEE SE EEE REN 20 EG EE DS LEDS aS 21 8 9 EE se EEE EEE EE ER 21 EN od Eb eege 22 9 1 4035 Profibus DP module yicisssscccsasteieissiavedesdcecansasnaves nas peenesanh ascndashedesasadveaesasdegessandevaseasenswetennes 22 eee 22 E JANNE 23 OTB JTAG cConnettor aiiicc
9. S lamp yellow and the RTS lamp yel low are lit flashing Verify that the TxLC lamp yellow is lit turns on after approx 5 seconds Verify that the two TxBB lamps green are lit both lit after 10 seconds Verify that NONE of the 1 2 3 or 4 lamps red are lit Verify that the 4X35 Profibus DP system unit has found the correct loadcells Par No 0 and that no loadcell error is indicated in the Status Word STW Reset all calibration factors by using the Reset Calibration bit in the Control Word CTW Zero the system weight with empty weighing arrangement by using the Zeroing procedure de scribed earlier Verify that every loadcell gives a signal Par No 48 63 by placing a load directly above each loadcell one after the other possibly with a known load Place a known load on the weighing arrangement and check that the system weight MAV corre sponds to the load Does the master take the exponent scaling into account if Gram mode has not been selected Zero the system weight with empty weighing arrangement by using the Zeroing procedure de scribed earlier Place a known load as close to maximum load as possible on the weighing arrangement If the system weight deviates to much from the actual load a fine calibration of the system is made using the Calibration procedure described earlier Version 2008 09 04 rev 1 Page 17 Eilersen Industrial Sensors 4X35 User manual The system
10. ault factory setting is OFF JU6 Reserved for future use normal default factory setting is OFF JU7 Selection of 32 Bit Signed Integer IEEE754 data format The jumper determines if the weight indications in the telegram are in 32 bit signed integer or in IEEE754 floating point format OFF 32 bit signed integer format normal setting from factory ON IEEE754 floating point format JU8 Selection of LSB MSB data format The jumper determines the byte order in which data are transmitted received OFF LSB first ON MSB first normal setting from factory 9 1 3 JTAG connector The 4035 Profibus DP module is internally equipped with a JTAG connector The connector J5 is used exclusively by Eilersen Electric A S for download of new software 9 2 4040 communication module For information on jumper settings DIP switch settings LED status lamps etc on the 4040 communication module that is not covered in the above please refer to the separate docu mentation that describes the 4040 communication module and its specific software Version 2008 09 04 rev 1 Page 23 Eilersen Industrial Sensors 9 3 Status codes 4X35 User manual Status codes for the connected loadcells are shown as a 4 digit hex number If more than one error condition is present the error codes are OR ed together Note that the table below is a list of error codes that normally can appear but that other error codes a
11. d only be changed in special situations 9 1 1 SW3 settings The 4035 Profibus DP module is internally equipped with a 4 pole DIP switch block named SW3 This DIP switch block has the following function SWITCH FUNCTION Sw3 1 Sw3 4 Expected number of loadcells The expected number of loadcells is set as indicated below Note that these switches are only read at power up where the number of loadcells is indicated using Sw3 1 Sw3 4 as follows Sw3 1 Sw3 2 Sw3 3 Sw3 4 Number of loadcells OFF OFF OFF OFF 16 OFF OFF OFF ON 1 OFF OFF ON OFF 2 OFF OFF ON ON 3 OFF ON OFF OFF 4 OFF ON OFF ON 5 OFF ON ON OFF 6 OFF ON ON ON 7 ON OFF OFF OFF 8 ON OFF OFF ON 9 ON OFF ON OFF 10 ON OFF ON ON 11 ON ON OFF OFF 12 ON ON OFF ON 13 ON ON ON OFF 14 ON ON ON ON 15 Version 2008 09 04 rev 1 Page 22 Eilersen Industrial Sensors 4X35 User manual 9 1 2 Jumper settings The 4035 Profibus DP module is internally equipped with 7 jumpers These jumpers have these functions JUMPER FUNCTION JU1 Selection of Standard mode Gram mode The jumper determines if certain weight indications in the telegram are in standard format must be scaled according to the exponent or directly in grams OFF Standard mode normal setting from factory ON Gram mode JU2 JU4 Reserved for future use termination normal def
12. ers where the loadcell zeroes are stored Note that no zeroing is performed at power on 6 2 Calibration procedure Fine calibration of the system should be performed using the following procedure 1 2 3 4 5 6 Check that the weighing arrangement is empty and that the gross weight is zero Zero if necessary Place a known load on the weighing arrangement Transfer the value for the known load to the Calibration load for corner system register The Calibrate system bit in the Control Word is activated Note that calibration is only done on the 0 1 transition By reading the Calibration OK and the Calibration not possible bits it is possible to read the result of the desired calibration If calibration is not possible the reason can be read in the Calibration register If Calibration OK is indicated the transferred gross weight should now match the used calibration load and the calibration factor has been updated If Calibration not possible is indicated the system calibration factor is not changed Version 2008 09 04 rev 1 Page 15 Eilersen Industrial Sensors 4X35 User manual If a corner calibration of the weighing arrangement is desired the above listed procedure can still be used as the following is taken into account 1 2 3 4 5 6 7 Corner calibration should be performed prior to system calibration During corner calibration the Calibration factor for system should be se
13. icisctecasaetioedeasdiacadvasdsdenasndeeceaadeaceniasesaadarabadactaaunendsaspavanaaaieeadeasbodenianes 23 9 2 4040 TE EE 23 9 3 Status COM Pep 24 9 EE eege 25 9 4 1 Unsigned integer format 16 ER euugeeehe enges 25 9 4 2 Signed integer format 32 bit esessesseesesssessessreeresresseseresserssesrersetsstsrrssressrsrresressresresees 25 9 4 3 IEEE754 floating point format 32 bit ssseseseseeseesesssreesesrssrseresressrserssresseesresrerseeneeesee 26 Version 2008 09 04 rev 1 Page 2 Eilersen Industrial Sensors 4X35 User manual 2 INTRODUCTION 2 1 Introduction This document describes the use of a 4X35 Profibus DP system unit from Eilersen Elec tric The 4X35 system unit consists internally of a 4035 Profibus DP module with the program listed on the front page and a 4040 communication module The 4X35 system unit is connected to X loadcells 1 4 With the program specified on the front page the 4X35 Profibus DP unit can act as a single system weight for up to 4 load cells It is possible to connect the 4X35 Profibus DP unit to a Profibus DP network where it will act as a slave It will then be possible from the Profibus DP master to read status read sys tem weight and perform commands such as zeroing and calibration Exchange of data between master and slave takes place as described in the following 2 2 Profibus DP specification The Profibus DP unit confirms to the following Profibus DP specifications Pr
14. is now installed and a final check is made before the system is taken into us age Possibly make a note of all zeroes Par No 80 95 and calibration factors Par No 96 112 for later use Note that in the above checklist no consideration has been made on which functions are implemented on the Profibus DP master Version 2008 09 04 rev 1 Page 18 Eilersen Industrial Sensors 4X35 User manual 8 HARDWARE DESCRIPTION 8 1 4X35 overview The following figure is an overview of a 4X35 system unit with 4 loadcell connections i e a 4435 system unit PROFIBUS 8 gt L Fa 8 2 4X35 front panel description This chapter describes the connections DIP switch settings and lamp indications that are available on the front panel of the 4X35 system unit 8 2 1 Connection of power The 4X35 system unit is powered by applying 24VDC on the green two pole connectors J2 and J3 as specified on the front panel of the 4X35 system unit This powers the entire 4X35 system unit including the loadcells NOTE If the loadcells are to be placed inside an EX area then the 4X35 system unit itself MUST be placed outside the EX area and the 4X35 system unit MUST be supplied as fol lows 1 The 2 pole connector J3 located to the right above the 4 pole DIP switch block MUST be pow ered by a 4051 A power supply 24VDC ATEX approved from Eilersen Electric 2 The 2 pole connector J2 located to the left above
15. manual Calibration register is a bit register for indication of errors during calibration The individual bits have the following function BIT NO FUNCTION LC error during calibration Check status for the individual loadcells 1 Calibration load not selected valid Check that a valid calibration load has been selected 2 4 3 Calibration range exceeded It was not possible to calibrate the system within the valid calibration range Check that nothing is affecting the weighing arrangement mechanically Check that the value in the Calibration load for corner system register corresponds to the actual load Calibration corner not selected valid Check that a valid calibration corner has been selected Gross weight was negative during calibration Check the gross weight and whether it shows zero without any load 5 15 Reserved for future use Exponent for MAV is a register containing the exponent for the MAV If Gram mode has not been selected using jumper JU1 the transferred gross weight has to be compared with this exponent It indicates the resolution of the MAV gross weight as described under Expo nent for loadcell X The exponent corresponds to the smallest loadcell exponent Exponent for loadcell X is a register containing the exponent of loadcell X The transferred weighing result has to be compared with the exponent for the loadcells The exponent is a fixed value 2 complement for a given loadcell and it indicates
16. ogram MAV handling During communication from the slave the weight to the master the four last bytes in the PCD part are used as a Main Actual Value MAV the actual value The Main Actual Value MAV is used to transfer the actual gross weight of the system The gross weight must be scaled in accordance to the Exponent for MAV parameter Par No 15 if Gram mode has not been selected using jumper JU1 Default factory setting is that Gram mode is not se lected Note that the MAV part may be transferred in 32 bit signed integer format default or in IEEE754 floating point format depending on the actual jumper setting Version 2008 09 04 rev 1 Page 9 Eilersen Industrial Sensors 4X35 User manual 4 PARAMETER LIST 4 1 Parameter list A part from main values MRV MAV and control status word CTW STW which are transferred at all times using the PCD part it is possible to access the individual parameters one at a time using the PCV part The following parameters can be read updated using the PCV part LC register Bit register for indication of connected loadcells detected during power up Corner register Indicates corner loadcell number to be corner calibrated Reserved for future use Error register Bit register for indication of detected errors Zeroing register Bit register for indication of errors during zeroing Calibration register Bit register for indication of errors during calibration 2 Reserved for fu
17. otocol Profibus DP Communications form RS485 Module type Slave Baud rates kbit sec 9 6 19 2 93 75 187 5 500 1500 3000 6000 12000 Profibus address 0 127 Profibus connection 9 pin sub D female connector 2 3 Update times The 4X35 Profibus DP system unit samples the loadcell signals over a period of 200 mS The hereby found loadcell signals are used in the Profibus DP communication until new signals are achieved when the next sample period expires Update times across the Profibus DP communication depends on the specific Profibus DP configuration selected baudrate num ber of slaves scan times etc Version 2008 09 04 rev 1 Page 3 Eilersen Industrial Sensors 4X35 User manual 3 DATA EXCHANGE 3 1 Profibus DP communication using PPO Profibus DP communication with the 4X35 Profibus DP unit uses a so called parameter process data object PPO consisting of 14 bytes This object is used during reception as well as during transmission of data The structure of this telegram is as follows PCV PCD PCA IND PVA CTW MRV STW MAV Byte 1 Byte 14 The telegram is made up of two blocks a PCV part the first 8 bytes and a PCD part the last 6 bytes The two blocks are made up as follows PCV Parameter Characteristic Value PCA Bytes 1 2 Parameter Characteristics IND Bytes 3 4 Not used reserved for future use PVA Bytes 5 8 Parameter value PCD Process Data CTW Bytes 9 10 Master to Sla
18. parameter numbers where the calibration factors are stored Note that no calibration is performed at power on Version 2008 09 04 rev 1 Page 16 Eilersen Industrial Sensors 4X35 User manual 7 INSTALATION OF SYSTEM 7 1 Checklist during installation During installation of the system the following should be checked 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 If necessary the Profibus DP master should be configured to communicate with the 4X35 Profibus DP system unit using the supplied GSD file The loadcells are mounted mechanically and connected to BNC connectors in the front panel of the 4X35 system unit The 4X35 Profibus DP system unit is connected to the Profibus DP network using the Profibus DP connector in the front panel of the 4X35 system unit If necessary a possible termination of the Profibus DP network is made at this Profibus DP slave Use SW1 in the front panel of the 4X35 system unit to select any features specified in the separate manual for the 4040 communication module Use SWP 2 SWP 8 in the front panel of the 4X35 system unit to select the communication address of the 4X35 Profibus DP system unit Power 24VDC is applied at the 2 pole power connectors in the front panel of the 4X35 system unit as described in the hardware section and the Profibus DP communication is started Verify that the PBE lamp red is NOT lit and that the DE
19. r manual 5 PARAMETER DESCRIPTION 5 1 Parameter description The individual parameters have the following functions LC register is a bit register for indication of connected loadcells detected at power up Hence bit 0 15 will be ON if the corresponding loadcell was detected during power up Corner register indicates which corner loadcell number that has to be corner calibrated The loadcell number corresponds to the number on the front panel minus one i e 0 3 Val ues in the interval 4 65535 indicate that the calibration comer is not selected Error register is a bit register for indication of detected errors The individual bits have the following function BIT NO FUNCTION A checksum error for storage of zero and calibration in the SEEPROM of the module was detec ted during power up A calibration factor was out of range during power up or scale is not calibrated A zero was invalid during power up or scale has not been zeroed Inconsistency between number of detected loadcells during power on and the number of load cells indicated using Sw3 1 Sw3 4 Reserved for future use Zero register is a bit register for indication of errors during zero The individual bits have the following function BIT NO FUNCTION LC error during zero Check status for the individual loadcells 1 15 Reserved for future use Version 2008 09 04 rev 1 Page 12 Eilersen Industrial Sensors 4X35 User
20. re possible In such a case please refer to the documentation for the actual used 4040 program CODE CAUSE Hex 0001 Reserved for future use 0002 Reserved for future use 0004 Reserved for future use 0008 Reserved for future use 0010 Power failure Supply voltage to loadcells is to low 0020 New loadcell detected or loadcells swapped Power the system off and back on Then verify that all parameters are acceptable 0040 No answer from loadcell Bad connection between loadcell and loadcell module Bad connection between loadcell module and communication module 0080 No answer from loadcell Bad connection between communication module and Beebus master 0100 Reserved for future use 0200 Reserved for future use 0400 Reserved for future use 0800 No loadcell answer Bad connection between loadcell and loadcell module Bad connection between loadcell module and communication module Bad connection between communication module and Beebus master Bad setting of DIP switches on loadcell or communication module 1000 Reserved for future use 2000 Reserved for future use 4000 Reserved for future use 8000 Reserved for future use Version 2008 09 04 rev 1 Page 24 Eilersen Industrial Sensors 4X35 User manual 9 4 Data formats The Profibus DP communication can transfer data in the following three data formats If necessary please refer to other literature for
21. roing register Note that the bit is cleared during the zero proc ess and after the Zero system bit is cleared again If the Calibration OK bit is ON the last calibration request has been performed Note that the bit is cleared during the calibration process and after both the Calibrate corner and Cali brate system bits are cleared again If the Calibration not possible bit is ON the last calibration request has not been performed The reason for this can be read in the Calibration register Note that the bit is cleared during the calibration process and after both the Calibrate corner and Calibrate system bits are cleared again If the Reset calibration OK bit is ON the last reset calibration request has been performed Note that the bit is cleared during the process and after the Reset calibration bit is cleared again Version 2008 09 04 rev 1 Page 8 Eilersen Industrial Sensors 4X35 User manual If the Clear error OK bit is ON the last clear error request has been performed Note that the bit is cleared during the process and after the Clear error in Error register bit is cleared again If the Error detected bit is ON the system has detected an error The actual error can be found in the Error register MRV handling During communication from the master to the slave the weight the four last bytes in the PCD part are used as a Main Reference Value MRV a setpoint The Main Reference Value MRV has no function in this pr
22. t to its standard value of 32768 Corner calibration is done one corner at a time where the above listed procedure is used for each corner The actual calibration corner is selected in the Corner register prior to start of cor ner calibration The corner number corresponds to the loadcell number on the front panel of the system unit minus one i e 0 3 If in doubt the loadcell number can be verified by finding the Actual gross weight for loadcell X which gives a corre sponding signal change when a load is placed removed directly above the actual loadcell It is the Calibrate corner bit in the Control Word CTW that has to be activated and not the Calibrate system bit The used calibration load must be placed directly above the actual loadcell so that it is this loadcell that absorbs the entire load It is not the system gross weight that has to be observed but the Actual gross weight for loadcell X If the other loadcells are completely unloaded this value should correspond with the system gross weight Every corner calibration only changes the calibration factor for the corresponding corner The other corner and system calibration factors remain unchanged It is always possible to read the achieved or used calibration factors by reading from the pa rameter numbers where the calibration factors are stored If in possession of calibration factors from a previous calibration it is possible to insert these by writing to the
23. tandard calibration factor corresponding to no calibration Calibration factor for system contains the system calibration factor The value is determined during calibration of the system and lies in the interval 24576 40960 with 32768 as center value standard calibration factor corresponding to no calibration Calibration load for corner system must contain the load used during calibration of the sys tem or corner Note that this parameter is always transferred in the same format as the MAV The format may vary depending on the actual jumper settings MSB LSB first SI32 IEEE754 format and Standard Gram mode Version 2008 09 04 rev 1 Page 14 Eilersen Industrial Sensors 4X35 User manual 6 DATA PROCESSING 6 1 Zeroing procedure Zeroing of the system all loadcells should be done using the following procedure 1 2 3 The weighing arrangement should be empty and clean The Zero system bit in the Control Word is activated Note that zeroing is only done on the 0 1 transition By reading the Zeroing OK and the Zeroing not possible bits it is possible to read the result of the desired zeroing If zeroing is not possible the reason can be read in the Zeroing register It is always possible to read the achieved or used zero by reading from the parameter numbers where the loadcell zeroes are stored If in possession of a zero from a previous zeroing it is possible to insert this zero by writing to the parameter numb
24. the SPC3 Red The 4X35 Profibus DP system unit was not initialized correctly TxBB Left 4035 communication with 4040 module internal Green 4035 Profibus DP module is transmitting to 4040 module DI Reserved for future use Green D2 Reserved for future use Green TxLC 4040 communication with loadcells Yellow Please refer to the separate 4040 manual for further information TxBB Right 4040 communication with 4035 Profibus DP module internal Green Please refer to the separate 4040 manual for further information 1 Status for loadcell 1 Red Bad connection loadcell not ready or other error detected 2 Status for loadcell 2 Red Bad connection loadcell not ready or other error detected 3 Status for loadcell 3 Red Bad connection loadcell not ready or other error detected 4 Status for loadcell 4 Red Bad connection loadcell not ready or other error detected 8 3 Hardware Selftest During power on the 4X35 Profibus DP system unit will perform a hardware selftest The test will cause the light emitting diodes D1 D2 and PBE to turn on and off shortly one at a time Version 2008 09 04 rev 1 Page 21 Eilersen Industrial Sensors 4X35 User manual 9 APPENDIX 9 1 4035 Profibus DP module This chapter describes possible connections DIP switch settings and jumper settings that are available internally on the 4035 Profibus DP module These will normally be set from Eilersen Electric and shoul
25. the lines has been listed 8 2 4 SW1 settings The front panel of the 4X35 system unit is equipped with a 4 pole DIP switch block named SW1 These switches are mounted on the 4040 communication module and their function ality is described in the separate manual for the 4040 communication module They are typically used for filter selection 8 2 5 SWP settings The front panel of the 4X35 system unit is equipped with a 8 pole DIP switch block named SWP These switches allow setting of the Profibus DP communication address of the 4X35 Profibus DP system unit This DIP switch block has the following function SWITCH FUNCTION SWP 1 Reserved for future use SWP 2 SWP 8 Selection of Profibus DP communication address The address is selected as the DIP switches are binary coded so SWP 2 is MSB and SWP 8 is LSB Note that these switches are only read during power on Version 2008 09 04 rev 1 Page 20 Eilersen Industrial Sensors 4X35 User manual 8 2 6 Light Emitting Diodes LEDs The front panel of the 4X35 system unit is equipped with a number of status lamps light emitting diodes These have the following functionality LED FUNCTION DES Data Exchange State Yellow Exchange of data between 4X35 Profibus DP slave and master RTS RtS signal SPC3 Yellow The 4X35 Profibus DP system unit sends to the master PBE Profibus Error when initializing
26. ture use 15 Exponent for MAV 16 19 Exponent for loadcell 0 3 20 31 2 R Exponent for loadcell 4 15 48 51 Actual gross weight for loadcell 0 3 52 63 4 R Actual gross weight for loadcell 4 15 64 67 Le Actual signal for loadcell 0 3 68 79 4 R Actual signal for loadcell 4 15 4 RW Actual zero for loadcell 4 15 100 111 4 RW Corner calibration factor for loadcell 4 15 4 RW Calibration factor for system 2R 2R 32 35 2R Status for loadcell 0 3 36 47 2 R Status for loadcell 4 15 4R Calibration load for corner system 114 127 Reserved for future use Version 2008 09 04 rev 1 Page 10 Eilersen Industrial Sensors 4X35 User manual Note that NO indicates the parameter number for the parameter in question Note that TYPE indicates the length of the parameter in question 2 2 bytes and 4 4 bytes In addition after the length it is indicated whether its a read and write register RW ReadWrite or its a read only register R Read Note that data values are transferred as 2 complement signed values Note that a after the parameter number indicates that the parameter in question is stored in the SEEPROM of the module why this parameter can be remembered after power has been disconnected Please note that no zeroing or calibration is performed at power up Version 2008 09 04 rev 1 Page 11 Eilersen Industrial Sensors 4X35 Use
27. ve Control Word STW Bytes 9 10 Slave to Master Status Word MRV Bytes 11 14 Master to Slave Main Reference Value MAV Bytes 11 14 Slave to Master Main Actual Value In the following the meaning of the individual blocks in the telegram is described in detail The byte order MSB LSB first for the individual parts is selected using jumper JU8 and upon factory delivery it is default set to MSB byte first The data format of the MAV part and parameters in the PVA part is 32 bit signed integer format 2 s complement It is possible however by using of jumper JU7 to change so that the MAV part and certain parameters in the PVA part are transferred in IEEE754 floating point format During transmission reception of data consisting of several bytes for example the MAV it is up to the master the PLC to provide for consistent belonging together data Version 2008 09 04 rev 1 Page 4 Eilersen Industrial Sensors 4X35 User manual 3 2 PCV Description The PCV part of the telegram is as mentioned made up of a PCA part an IND part and a PVA part As mentioned the IND part is not used but the functionality of the other two parts of the PCV is described here PCA handling The PCA part contains a RC part for request and response indication and a PNU part for indication of parameter number This is shown in the figure of the PCA block below Bit 15 Bit 0 RC Request Response Characteristics Values 0 15 TB
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