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DGT / DGT60 / DGTQ / DGTP

7

2.4 EARTHING SYSTEM

For the right earthing and the optimal functioning of the system, it is necessary to ground the indicator, load cells,
eventual junction box, and the weighing structure.

INDICATOR

Ground terminal 2 (GND) using a copper cable with a section not less than 16 mm

2

.

LOAD CELLS AND JUNCTION BOX

-

In the case the load cells are connected to the indicator through a junction box, it is necessary to connect the
sheathing both of cells cables and of indicator cable to the earthing of the junction box (refer to the junction box
manual) and connect this to the earth through copper cables having at least a 16 mm

2

cross-section.

-

If the load cells are directly connected to the indicator (without the junction box), it is necessary to ground the
sheathing of the cell cables using copper cables having at least a 16 mm2 cross-section.

Moreover in both cases it is required to:

Connect the upper side of every cells to the lower side using a copper braid having at least 16 mm2 cross-
section; the upper side must be short-circuited with the surface of the weighing structure and the lower one
must be connected to the earth using a copper braid having at least 16 mm2 cross-section.

Use Earth plate of suitable length, in order to obtain a total resistance of earthing plant lower than 1 Ω.

WEIGHING STRUCTURE

Connect the weighing structure and the possible connected structures (for example silos that release material on the
weighing structure) to the earth through copper cables having at least a 16 mm

2

cross-section.

NOTES:

In the case the weighing system regards great and/or outdoor structures, the cross-section must be greather
(for example 50 mm2), because the voltage into play is greather (for example thunderbolts).

In order to avoid possible undesired effects, if there are other shielded cable connected to the indicator (for
instance, PC cable) the shield should be earthing only on the cable termination towards the indicator.

Every shielded cable or not (for instance PC cable, cell cable, power supply cable) connected to the indicator
should be as shorter as possible, then you have to come out of the shield the minimum length of cable, go
three round around a ferrite ring and then connect to the terminal box.

If  the  indicator  is  situated  inside  an  electric  panel,  the  power  supply  cable  should  be  a  shielded  cable  as
shorter  as possible,  distant  from  every  coil  supply  cable,  inverter, electromotive  force,  etc.  and  in addition
dedicate an  uncoupler transformer in order to feed the indicator only.

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Содержание DGT

Страница 1: ...WEIGHT INDICATORS DGT DGT60 DGTQ and DGTP Technical Manual DGT_DGT60_DGTQ_DGTP_06 01_09 11_EN_T...

Страница 2: ...OM1 DGTQ DGTQ AN DGTP DGTP AN SERIAL PORT 31 6 2 RS232 or COM2 SERIAL PORT 33 6 3 PROFIBUS PORT DGT4PB DGTQPB and DGTPPB version 34 6 4 SERIAL PORT TRANSMISSION MODES 34 6 4 1 PC PORT SELECTION 34 6 4...

Страница 3: ...nect the upper and lower supporting plate with a copper wire cable and then earth all the upper plates Use waterproof sheaths and couplings in order to protect the load cell cables Use a waterproof ju...

Страница 4: ...ny drops in voltage in the part of the cable that connects the instrument to the transducer It is useful when the distance between the indicator and the transducer is greater than 10 m IMPORTANT If on...

Страница 5: ...in the part of the cable that connects the instrument to the transducer It is useful when the distance between the indicator and the transducer is greater than 10 m The 4 pin C1 C2 C3 e C4 connectors...

Страница 6: ...in the part of the cable that connects the instrument to the transducer It is useful when the distance between the indicator and the transducer is greater than 10 m The 4 pin CELL1 CELL2 CELL3 e CELL4...

Страница 7: ...r braid having at least 16 mm2 cross section Use Earth plate of suitable length in order to obtain a total resistance of earthing plant lower than 1 WEIGHING STRUCTURE Connect the weighing structure a...

Страница 8: ...EXAMPLE Non weighing structure silo Weighing structure Load cell U bolt between plate under cell and weighing structure not supplied 4 6 16 mm earth cable section not supplied 8 50 mm earth cable sec...

Страница 9: ...modified blinking TARE Allows to scroll backwards through the programming steps In the case in which one enters a numeric value the selected digit blinking increases MODE Allows to quickly position on...

Страница 10: ...K diSAb diSAb EnAb AutoFF deFAu ini AL inPutS outPut SEriAL d SALE ConFiG no YES inP 1 inP 2 nonE ZEro tArE ModE Print C oFF diS KEY out 1 out 2 FunC no nC onStAt rL iSt 0 nonE 1 GroS 2 nEt 3 PCS 4 Gr...

Страница 11: ...tS PrConF Prn CtS tErM EndPAG ntik doM bLinE LAnG nuMWEi n 8 1 n 8 2 n 7 2 E 7 1 E 7 2 PForM itAL EnGL dEut FrAn ESPA YES no both no tot SuM dt no dt in 1 dt in 2 dt EX 1 dt EX 2 no YES tot SuM both r...

Страница 12: ...ddt 1 tp 1 ddt 2 n tP EquAL tp 2 ddt 3 tp 3 nChan Chan 1 4 1 4 thEo CA CEL SEn CEL CAP dEAd Ld Kno WGt EnAb CYCLE diSAb C PErC XX diV Stb 0 PErC 0 trACk XX FiLt 50 no yes shows that the parameter is v...

Страница 13: ...t FUNCTIONING MODE Std Unit of measure conversion ntGS Net weight gross weight conversion inout Input output weigh Once the in out mode is selected tYPE is displayed for an instant and then one is ask...

Страница 14: ...ONTROL CONFIGURATION With the 4 key remote control optional it is possible to remote the ZERO TARE MODE and ENTER PRINT keys or just the TARE key ir no Remote control disabled ir 1 All the remote cont...

Страница 15: ...y has been pressed during the set time the display shows the blinking oFF message and an acoustic signal is emitted then the indicator turns off disAb auto switch off disabled EnAb auto switch off ena...

Страница 16: ...scale 1 diSAb Disabled CYCLE Executed cyclically on all the present scales This value is not visible if there is just one scale see nChAn parameter or with more scales connected in a dependent way see...

Страница 17: ...played if the instrument is approved DsP rF DISPLAY REFRESH It is possible to slow the speed of the display refresh improving the stability of the displayed data norM The function of improving the sta...

Страница 18: ...it remote display rEPE 4 transmission to 4 digit remote display Pr no Notes By selecting the REPE 6 protocol the serial output is automatically set at 4800 N 8 1 In any case it s possible to set it di...

Страница 19: ...4 transmission to 4 digit remote display rEPE 6 transmission to 6 digit remote display Reception of the rEPE 6 string Prin St transmission of standard string when the PRINT key is pressed Prin EX tra...

Страница 20: ...CR LF in which s is the weight sign ppppppp is the weight value uu is the unit of measure one should set the value 11 01 dECi REMOTE SCALE DIVISIONS Enter the number of scale s decimals from 0 to 5 0...

Страница 21: ...nstrument the indicator will repeate the weight if the address in the received string is the same as the address set here no 485 protocol disabled YES 485 protocol enabled If one enables the 485 proto...

Страница 22: ...Et Set point on the Net Weight 3 PCS Set point on the Pieces 4 Gro 0 Gross Weight at zero 5 nEt 0 Net Weight at zero 6 Moti Instability 23 k Pr Pressing of the PRINT key 25 k Mo Pressing of the MODE k...

Страница 23: ...is disabled With switching condition upon stability the output is enabled only when after the set time has passed the weight shows to be stable The delay time is considered only if one has selected t...

Страница 24: ...one has selected the rEPE or MAStr functioning mode FmodE FunCt parameter AdC uV MICRO VOLTS By pressing PRINT the instrument shows the micro volts relative to the weight on the scale With the ZERO a...

Страница 25: ...RX2 in the COM2 terminal Furthermore the ASCII TEST CRLF string is continuously transmitted on both the serial lines CAREFUL It s not possible to test the functioning of the COM1 port if configured li...

Страница 26: ...4 independent scales either in the IND CH or in the TRANSM functioning mode see section 3 2 tYPE Application type Each single cell must be connected to an instrument channel if one wants to connect m...

Страница 27: ...ls 1 000 three decimals 100000 no decimal confirm with PRINT 1 000 10 Unit of Measure Select the u M and press PRINT Set the unit of measure g Lb t kg and press PRINT kg 11 Select the CALib P step and...

Страница 28: ...lsory in some applications it can not be done Calib ConFiG GrAV 9 75001 9 84999 diV dECi u M 1 2 5 10 20 50 G Lb t kG CALib P 1 2 3 no rAnGE 1 rAnGE 2 tP 0 ddt 1 tp 1 ddt 2 n tP EquAL tp 2 ddt 3 tp 3...

Страница 29: ...e zero point unload the scale and wait a few seconds then press PRINT if the equalization of the channels has not been made the no Eq message appears and the instrument emits an acoustic signal press...

Страница 30: ...measure is the one configured for the scale up to 999999 and confirm with PRINT 5 Setting pre load weight Select the dEAd Ld step press PRINT enter the weight of the structure bearing on the load cel...

Страница 31: ...Approved instrument In the SET UP ENVIRONMENT in the SEtuP ConFiG GrAV step it is possible to only have displayed the gravitation acceleration value of the destination zone of use Non approved instru...

Страница 32: ...LE GND GND GND Black RTS B RX1 Yellow RX A TX1 Grey Blue not connected Below is the connection in RS232 between the PC and the COM1 serial port of the DGTQ and DGTP indicator PC PC INDICATOR INDICATOR...

Страница 33: ...below the connection between the TPR printer and the indicator TPR INDICATOR STANDARD Terminal board CABLE GND GND Black RTS RX Yellow RX TX Grey Blue not connected Please find below the connection in...

Страница 34: ...US transmission mode available only for the PC port see SEtup SEriAL CoM Pc PcModE step 6 4 SERIAL PORT TRANSMISSION MODES 6 4 1 PC PORT SELECTION It s possible to select the serial port to be used as...

Страница 35: ...ort when the PRINT key is pressed except for in the TOTALIZER mode where one should press the MODE key For non approved instruments The transmission takes place if the weight is stable and the net wei...

Страница 36: ...scale becomes stable a communication string is transmitted on the PC serial port For non approved instruments The transmission takes place if the weight is stable and the net weight is 10 divisions Re...

Страница 37: ...R SLAVE functioning mode see section 8 4 MULTISCALE REPEATER MAStr USER MAN REF only the transmission modes to the printer and the rEPE 4 and rEPE 6 transmission mode are enabled for the printer port...

Страница 38: ...onse of the instrument in TRANSM and DEP CH mode MULTISCALE STRING See section 6 6 3 NOTES If the instrument is in the IND CH mode scale with independent channels the voltage value is read relative to...

Страница 39: ...ean necessarily that the instrument executes the tare Command for viewing temporary message on the display CC DISPNNVVVVVV CR LF in which NN is the indicator display number standard 00 ascii hex V is...

Страница 40: ...ent response CC STATXX CR LF in which XX is a decimal value which supplies the status of the indicator the possible values are XX indicator status 00 normal scale status 01 normal scale status in inpu...

Страница 41: ...n stand by 009 instrument in automatic zero phase 010 instrument in change channel 011 instrument in input test phase AAA Counter of pressed keys CCCC Code of last key pressed TTT Counter of totalisat...

Страница 42: ...wants to read from 1 to 6 with the DGTQ model Answer ESC II INPUNVVVV STX In which N input number expressed in hexadecimals described previously VVVV input inputs status for the single input V 0000 me...

Страница 43: ...words N 0 the returned value corresponds to the hexadecimal codification of the status of the outputs Example ESC 01OUTS0 STX Result Reading of indicator s outputs status see the following explanation...

Страница 44: ...command of the outputs does not work in the set up environment No output is ascribed to bits from 6 to 15 bits and these are fixed at zero DGTP model A bit is ascribed to each input Board outputs Bit...

Страница 45: ...put while the bit at 0 as disabled output If for example one wants to enable simultaneously the R1 and R2 outputs the binary combination will be Board outputs Bit not managed RL 2 RL 1 Bit 15 0 Bit 14...

Страница 46: ...UT6 OUT5 OUT4 OUT3 OUT2 OUT1 Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 The bit at 1 is interpreted as active output while the bit at 0 as di...

Страница 47: ...correct command is transmitted from the PC to the indicator however it is followed by letters inserted involuntarily I E READF TARES ERR02 CR LF it is shown when a correct command is transmitted from...

Страница 48: ...the TRANSM mode ST Stability of the display US Instability of the display Comma character kk NT Net Weight GS Gross Weight GX Gross weight with sensitivity times 10 VL Value in micro volts relative to...

Страница 49: ...the tare is semiautomatic Comma character TTTTTTTTTT tare weight on 10 characters including possible sign and decimal point Comma character PPPPPPPPPP number of pieces on 10 characters equal to 0 if t...

Страница 50: ...relative to the weight Comma character pppppppp 8 digits including eventual sign and decimal point which identify the weight The insignificant digts are filled with spaces Through the MVOL and RAZF c...

Страница 51: ...tput disabled Ao G analogue output on gross weight Ao n analogue output on net weight Once the functioning mode is confirmed one sets the values of the analogue output in other words the digital analo...

Страница 52: ...R VALUES VOLTAGE VALUE V CURRENT VALUE mA 1200 0 0 12700 4 58600 20 62650 10 8 PROGRAMMING THE PRINTOUTS If in the set up environment the presence of the printer has been configured correctly the indi...

Страница 53: ...rM n 8 1 n 8 2 n 7 2 E 7 1 E 7 2 IntES Int no Int Si Int Fi Int SuM dEFAuL FiLdS hEiGt bArFs bArC VdbAr LMbAr WbAr hbAr PtESt PntVb dEFAuL FiLdS ChAr t LMArG LAbELh ChAr 1 ChAr 2 tMArG bArC LAbELW bAr...

Страница 54: ...in 2 but the indicator s date and time board optional is used NOTE The date and time is printed if programmed before the possible barcode which is always at the end of the printout dt No ntik PRINTS...

Страница 55: ...e weight data which one wants to print and the print layout Depending on the type of printer selected in the PrModE step LP542P or tPr the parameters which are suggested change nr CoP NUMBER OF TICKET...

Страница 56: ...one programmes the printing of the 39 CODE if TPR has been selected in the PrModE step which will be printed before the printing of the date and time no does not print the bar code yes tot prints the...

Страница 57: ...s numeric field no the numeric field is not printed undEr under the bar code AboVE above the bar code Ab un both above as well as below the bar code PtESt PRINT TEST By pressing PRINT a label is print...

Страница 58: ...e label onto the printer doWnLd step and then save it in its permanent memory carefully read section 8 1 DEFAuL PRINTOUT DEFAULT In this step one enables the default printout relative to the selected...

Страница 59: ...ect to the second two GROSS TARE NET DATE and TIME One will programme in the heading LinE 1 and LinE 2 ChAr 2 LinE 3 and LinE 4 ChAr 1 ChAr t ChAr 1 ChAr 1 Font 3 ChAr 2 Font 3d Result t MarG DISTANCE...

Страница 60: ...STEP A PARAMETER DIFFERENT FROM no HAS BEEN SET VdbArC SELECTING THE VERTICAL DISTANCE OF THE BAR CODE FROM THE PREVIOUS TEXTS Enter a value with 3 digits expressed in mm 5 LMbAr SELECTING THE LEFT MA...

Страница 61: ...ble HOLD mode the first time the fields without the HOLD message are printed the second time the ones with the HOLD message are printed and so on PEAk mode the first time the fields without the PEAK m...

Страница 62: ...reen led blinks while this happens do not do anything with the indicator or the labeller The saving of the label ends when the led stops blinking The labeller has the label saved and is ready to print...

Страница 63: ...heading follow the procedure described below Enter in the TECHNICAL SET UP SEtup SeriAL CoM Prn CoM Prn PrConF doM nuMWEi both no tot SuM IntES Int no Int Si Int Fi Int SuM 1 Enter in the step CoM Pr...

Страница 64: ...2 Calibration error the acquired calibration point tP1 o tP2 o tP3 is equal to the zero point tP0 Er 37 Scale to be calibrated TECH MAN REF it is advisable to carry out a technical default dEFAu param...

Страница 65: ...DGT DGT60 DGTQ DGTP 65 11 CONNECTION SCHEMES 11 1 DGT4 DGT60 DGT4 AN MOTHERBOARD I O BOOT J 1...

Страница 66: ...res in the CELL 1 terminal board without using the SENSE signal one should short circuiting SEN with EXC and SEN with EXC CELL2 24 SIG SIGNAL 25 SIG SIGNAL 26 EXC EXCITATION 27 EXC EXCITATION CELL3 28...

Страница 67: ...SERIAL PORT DGT4 DGT60 and DGT4 AN models 13 A 485 Line 14 B 485 Line RS 232 SERIAL PORT 15 TX Transmission 16 RX Reception 17 GND GND INPUTS OPTOISOLATOR PHOTOCOUPLERS AND PHOTOMOSFET OUTPUTS for al...

Страница 68: ...DGT DGT60 DGTQ DGTP 68 11 2 DGT4 PB MOTHERBOARD I O BOOT J 1...

Страница 69: ...ut using the SENSE signal one should short circuiting SEN with EXC and SEN with EXC CELL2 24 SIG SIGNAL 25 SIG SIGNAL 26 EXC EXCITATION 27 EXC EXCITATION CELL3 28 SIG SIGNAL 29 SIG SIGNAL 30 EXC EXCIT...

Страница 70: ...R PHOTOCOUPLERS AND PHOTOMOSFET OUTPUTS for all the versions The maximum power of the outputs 48 Vac 0 15 A max or 60 Vdc 0 15 A max the maximum voltage applicable to the inputs is between 12 24 Vdc w...

Страница 71: ...DGT DGT60 DGTQ DGTP 71 11 3 DGTQ DGTQ AN BOARDS...

Страница 72: ...DGT DGT60 DGTQ DGTP 72 I O BOOT J1 J2 CAL...

Страница 73: ...signal one should short circuiting SEN with EXC and SEN with EXC by closing the J1 and J2 jumpers CELL2 C2 4 Pin AMP Connector 31 SIG SIGNAL 32 SIG SIGNAL 33 EXC EXCITATION 34 EXC EXCITATION CELL3 C3...

Страница 74: ...M 1 SERIAL PORT DGTQ and DGTQ AN versions JUMPERS COM1 RS485 RS232 8 GND GND 1 and 2 all closed RS485 serial line 9 A Line 485 Transmission 2 and 3 all closed RS232 serial line 10 B Line 485 Reception...

Страница 75: ...DGT DGT60 DGTQ DGTP 75 PHOTOMOSFET OUTPUTS for all the versions The maximum power of the photomosfet outputs 48 Vac 0 15 A max or 60 Vdc 0 12 A max 60Vdc 0 15A max 48Vac 0 15A max...

Страница 76: ...DGT DGT60 DGTQ DGTP 76 11 4 DGTQ PB BOARDS...

Страница 77: ...DGT DGT60 DGTQ DGTP 77...

Страница 78: ...nal one should short circuiting SEN with EXC and SEN with EXC by closing the J1 and J2 jumpers CELL2 C2 4 Pin AMP Connector 31 SIG SIGNAL 32 SIG SIGNAL 33 EXC EXCITATION 34 EXC EXCITATION CELL3 C3 4 P...

Страница 79: ...Reception 8 GND GND PROFIBUS FEMALE CONNECTOR DGTQ PB version 3 B LINE 5 GND BUS 6 5VBUS 8 A LINE INPUTS OPTOISOLATOR PHOTOCOUPLERS for all the versions The maximum voltage applicable to the inputs i...

Страница 80: ...DGT DGT60 DGTQ DGTP 80 PHOTOMOSFET OUTPUTS for all the versions The maximum power of the photomosfet outputs 48 Vac 0 15 A max or 60 Vdc 0 15 A max 60Vdc 0 15A max 48Vac 0 15A max...

Страница 81: ...DGT DGT60 DGTQ DGTP 81 11 5 DGTP DGTP AN DGTP PB MOTHERBOARD...

Страница 82: ...f one wants to use 4 wires in the CELL 1 terminal board without using the SENSE signal one should short circuiting SEN with EXC and SEN with EXC CELL2 CELL2 4 Pin AMP Connector 1 EXC EXCITATION 2 EXC...

Страница 83: ...HOTOCOUPLERS AND PHOTOMOSFET OUTPUTS for all the versions The maximum power of the outputs 48 Vac 0 15 A max or 60 Vdc 0 15 A max the maximum voltage applicable to the inputs is between 12 24 Vdc with...

Страница 84: ...S AND EXPANSION BOARD JUMPERS ANALOGUE OUTPUT DGTP AN version SLOT 1 I O 1 33 I 20 mA 34 COM GND 35 V 10 V SLOT 2 I O 2 36 I 20 mA 37 COM GND 38 V 10 V Note the maximum resistance applicable on the ou...

Страница 85: ...TP and DGTP AN models 24 A 485 Line 25 B 485 Line COM1 RS 232 SERIAL PORT 26 TX Transmission 27 RX Reception 28 GND GND COM2 RS 232 SERIAL PORT 29 TX Transmission 30 RX Reception 31 CTS Synchronism si...

Страница 86: ...SLOT 2 I O 2 36 I 20 mA 37 COM GND 38 V 10 V Note the maximum resistance applicable on the output current is 350 Ohm and the minimum resistance applicable on the output voltage is 10 kohm PROFIBUS FE...

Страница 87: ...resistances On the RS485 network normally one connects 2 termination resistances of 120 ohm shown with R in figure 1 ONLY on the 2 devices which are at the 2 ends of the cable The maximum reachable le...

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