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pH ARC Sen so rs Mod bus RTU Progra mmer ’ s Manua l (EPH UM011 ) 6243 00/01 page 1 / 67 pH ARC Senso rs Modb us RTU Progra mmer ’ s Manu al Firmware version: EPHUM011.
pH ARC Sen so rs Mod bus RTU Progra mmer ’ s Manua l (EPH UM011 ) 6243 00/01 page 2 / 67 Important N otice All rights res er v ed. No part o f this docu ment may b e re produ ced, store d in a retrieva l sys tem, or trans mitt ed in any f or m w it hou t written pe rmis sion fro m HAMILTON Bon aduz A G.
pH ARC Sen so rs Mod bus RTU Progra mmer ’ s Manua l (EPH UM011 ) 6243 00/01 page 3 / 67 Ta ble of Content 1 MODB US R TU GENER A L IN FOR MA TION ................................ ............................................... 4 1.1 I NT RODUCT ION .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 / 67 1 Modbus RT U general inf ormatio n 1.1 Int r oduction This docu ment des cri bes in detai l the pH ARC Sen so rs Modbus RTU interface. It is addre sse d to so f tw are progra mmers.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 / 67 2 pH A RC Sensor Com mands in Modbus RT U 2.1 General In order t o co mm unicate with a pH ARC Sens or ov er Mo dbus RTU protocol a Modbus master terminal application s o f twa re is need ed.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 6 / 67 Command: Operator le v el Modbu s address : 428 8 Leng th: 4 Type: 3 Rea d Parameter: Operator le vel Passw ord Format: Hex decimal Value: 0x3 0 0 Figure 2.2.1.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 7 / 67 2.3 Configurati on of the se ri al RS 485 Int erface Factory settings o f the RS485: Parity is n one, 1 s tart bit, 8 data bits , 2 stop bits (in tota l: 11 bits).
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 8 / 67 2.3.2 Baud Rate 2.3.2.1 Reading an d Writ i ng t h e B a ud Ra te The baud ra te can be read an d w ritt en in reg ister 4102.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 9 / 67 2.4 Configurati on of the Anal og Interfaces 2.4.1 Availab le A nalog Interfaces A pH ARC Sens or has tw o individual phys ical ana l og inter f aces that ha v e ident ical functiona l it ies, but can be con f igured indepen dently fro m ea ch o ther.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 0 / 67 2.4.3 Des cription of the A nalog Interfaces 1 and 2 Regis ter 4352 / 4480 con tain the des cri ptions o f.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 1 / 67 2.4.5 Co nfiguration of the 4-20 mA I nterface Note: The configuration o f AO1 / AO2 i s only effecti v e i f register 4360 / 4488 (active ana l og interface mode) is se t t o the v alue 0x01, 0x02 or 0x04.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 2 / 67 2.4.5.3 Reading t he M inimum and Max imum Possi ble Phys i cal Output Curr ent Start register N umber o f.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 3 / 67 2.4.5.5 Reading t he Selec te d Physica l Unit for A nalog Inter face Start register N umber o f registers R eg1 / Reg2 Modbu s f unc t ion code Read access Write access 4376 2 Selected phys ical unit o f AO1 (se e chapter 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 4 / 67 p H A RC se ns o r : 4- 20 mA int e rf a ce - li n e a r -15 -10 - 5 0 5 10 15 20 25 30 35 0 4 8 12 1 6 20 2 4 Cur r e nt [ m A] tem p er atu re [°C] 1 2 3 4 5 6 7 8 9 10 11 pH T em p [° C ] p H Figure 2 .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 5 / 67 Attention: W hen as signing m eas urement va lues to 4-20 mA analo g output by us i ng reg i ster 43 78 / .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 6 / 67 2.4.5.8 Defining the Error a nd Warning O u tput of the 4-20 mA Interfac e Errors a nd w arning s can b e mapped to the A O1 / AO2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 7 / 67 2.4.6 Reading the In ternally Measured Output Cu rrent Reg.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 8 / 67 2.5 Measureme nt 2.5.1 Def inition of Measurement Channels a nd Physical Units The pH ARC Sens or Modbus r.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 1 9 / 67 The pH ARC Sens or register structure us es the followin g phys i cal units us ed f or Pr imary or Seco ndary Meas urem ent C hann els. Bit # Hex code Physical unit Start re gister.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 0 / 67 2.5.2 Primary Measurement Channel 1 (pH) 2.5.2.1 Des cription of PMC1 In register 2080, a plain text ASCII des cription of PMC1 i s gi v en .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 1 / 67 2.5.2.3 Reading the measurem ent value of PMC1 Regis ter 2090 is als o us ed to read the meas urem ent va lues of PMC1.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 2 / 67 2.5.3 Primary Measurement Channel 6 (Temperatur e) 2.5.3.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 3 / 67 2.5.3.3 Reading the measurem ent value of PMC6 Regis ter 2410 is als o us ed to read the measu rement val ues of PMC 6.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 4 / 67 2.5.5 Seco ndary Measurement Channels 1 -16 pH ARC Sen so rs do allow a ccess to s econdary measu rement v alues (16 in total) . The acces s to the individual SMC dep ends on the ope rator level.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 5 / 67 2.5.5.2 Reading the measurem ent value of SMC The registers defined he re are us ed to read the m eas urement values o f each SMC . Start reg. Num- ber of reg.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 6 / 67 2.6 Configurati on o f the M easureme nt This chapter describes the con fi gurat ion of PMC1 and PMC6 by means o f m eas urem en t para m eters (PA). 2.6.1 Availab le Parameters In register 307 2, al l a vailable para m eters (PA ) are g iv en .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 7 / 67 2.6.2 PA9: Moving Average The pH ARC Sens or prov ides new p H readings e v ery 3 seco nds. One has the poss i bility t o s moothen the pH read ing (PMC1 ) by means of a mo ving average app li ed to the 3-se conds -readings.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 8 / 67 2.6.2.1 Descr ipti on of PA 9 (Moving Aver age) In regis ter 336 0, a plain text ASC II de script ion o f PA9 is given.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 2 9 / 67 2.6.2.3 Reading all Va lues for PA 9 By reading reg i s ter 3370, the acti v e phys i ca l unit of me as urement, the s elected va lue, and the min and max values can be read.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 0 / 67 2.6.3 PA12: Moving Average R pH ARC Sen so rs allow to ha v e a sep arate moving a v era ge on se conda ry.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 1 / 67 By writing to register 34 66, the a ctive phys i cal un i t f or P A 12 can be s elected, by choos i ng on e o f t he phys i cal units that are de f i ned in reg ister 3464 .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 2 / 67 2.7 Calibration 2.7.1 Availab le Calib rat ion Points In register 512 0, the a v a il ab l e nu mber of Calibrat i on Po ints (CP) for P rim a ry Measu rement Cha nnel 1 (PMC1) is defined.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 3 / 67 2.7.2 Def initions of Ca libration Points 2.7.2.1 Calibration P oints 1 and 2 (Standard Ca librati on) The limits f or t he calibrat i on po i nt 1 are d e fi ned in regist er 5152, for calibrat i on poin t 2 in reg ister 5184 .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 4 / 67 Command: R ead cal ibration s tability Modbu s address: 5128 Le ngth: 4 Type: 3 R ead Parameter: Max drift pH [pH/min] Max drift Te mp [K/min] Format: Float F loat Value: 0.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 5 / 67 2.7.3 Cal ibration Procedure 2.7.3.1 Calibration at CP1 and C P2 ( Standar d Ca l ibrat ion) The ARC Sens or f a mily has a u nique ca libration rout i ne.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 6 / 67 Standard Calibrati on with Automatic Recog nition of th e Stan dard Prior to calibrat i on, t he specialis.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 7 / 67 Per f or m the follow i ng s teps to do a s t and ard calibration a t CP1 and C P2: Step1: Selec t the des ired s et of calibrati on stan d ards (se e chapte r 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 8 / 67 Examples: ( D e finitions o f register 5158 a nd 519 0 us ed i n the se e xamples are gi v en in chapter 2.7.4.1 , thos e for regis ter 4872 in cha pter 2.8 .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 3 9 / 67 Example to read the senso r ’ s quali ty indica tor: Command: Qua l ity indicator Modbus add ress: 4872 Len gth: 2 Type: 3 Re ad Parameter: Q ual it y [% ] Format: Float Value: 100 Figure 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 0 / 67 W ha t happe ns to the pH ARC Sens or ’ s ca li bration function upo n produ ct calibrat i on (CP6)? A product ca li brat ion adds an off s et to the linear ca li bration function de fi ned by the s tandard calibration at CP1 and CP2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 1 / 67 The different f unctional ities o f product ca li brat ion (CP6 ) are a cces sible through the follow i ng.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 2 / 67 2.7.3.2.2 Product calibrati on: Assignment After succes sful i n itial meas urement a correc t v a lue mus t be ass igned to the init i ally stored measure ment data.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 3 / 67 2.7.3.2.4 Product calibrati on: Restore sta ndard calibrati on If a prod uct calibration is active this product calibration can be t e mporarily switched off by writing the command 0 x 03 to reg i ster 534 0.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 4 / 67 2.7.4 Rea ding t he Calibration Status 2.7.4.1 R eading the Cal ibration Stat u s of CP1 and CP2 A s tandard cali bra t ion is not a lways su ccessful .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 5 / 67 Command: Ca libration s tatus CP1 Modb us add ress: 5158 Leng th: 6 Type: 3 Rea d Parameter: Status U nit Value Format: Hex He x Float Value: 0x0 0000 080 0x00 0010 00 4.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 6 / 67 2.7.4.2.1 Product calibration: Init ial measure ment Calibration s tatus a f ter initia l measure ment co .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 7 / 67 The here pe rformed as signment w as su ccess f ul. The se ns or is running us i ng a v al id product calibration .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 8 / 67 2.7.5 Currently active Calibration Parameters par t 1 In registers 5164 (C P1), 5196 (CP2 ) an d 5324 (C P6) the cu rrently act ive calibrat ion para m eters pa rt 1 are s tored.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 4 9 / 67 2.7.7 Currently active Calibration Parameters par t 3 In register 552 0, 5528 an d 5560 the pH v alue o f the us ed calibrat i on s tandards , the electrical potent i a l of the pH se ns or and the te mperature upon ca li bra tion are s t ored .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 0 / 67 2.7.9 Spe cial Co mman ds for Calibration with VISICAL The VI S ICAL calibrat i on device allows calibration of pH ARC Sens ors at CP1 or CP2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 1 / 67 2.7.10 Calibratio n Standards 2.7.10.1 A vailable Sets of Calibration Sta nd ards pH ARC Sen so rs can s t ore an d opera te six different s ets of calibrat i on s tandard s each ha v i ng m ax 12 calibration s tandards .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 2 / 67 2.7.10.2 Definitions for Individua l Sets of Calibratio n Standards Once the opera tor ha s s el ected a s.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 3 / 67 Regis ter 9528 de fines f or the s elected set o f cal ibration s tandards : the a v ai lable calibrat.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 4 / 67 By means of register 953 0, the s pecialist can de fi ne for ea ch a v ai lable calibrat ion stand ard if the sp ecifi c sta ndard is av a il able. Start register N umber o f registers R eg1 / Reg2 (Bit, see figure 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 5 / 67 Manufacture r Av ailabi lity f or manual selection (left) and automatic recogni tion (right) HA MI LTON ME.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 6 / 67 Manufacture r Av ailabi lity f or manual selection (left) and automatic recogni tion (right) METTLER TOLEDO RA DIO METER Figure 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 7 / 67 2.8 Sensor Stat us 2.8.1 T emperature Ranges In registers 4608 , 4612 and 4 616 three d ifferent te m per .
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 8 / 67 2.8.2 Op erating Hours an d Counters In register 467 6 are g iv en: total opera ting hours opera ting hours a bo v e ma x meas urement te mperature (se e chapter 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 5 9 / 67 2.8.3 Warnings A “ W arning ” is a not ifi cation mess age w hich still allow s f ur ther func ti on i ng o f the sys t em. This mess age alerts the ope rator o f a poss i ble problem that could lea d to uncertain res ul ts.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 6 0 / 67 2.8.4 Errors An “ Error ” mess age i ndicates a se rious problem of t he senso r wh ich does not all ow f urther proper f unc t ion ing of the s ens or. This proble m must be s olv ed.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 6 1 / 67 2.8.4.3 D efinition of Errors Bit # Hex Description not a v a il able 5 0x0000 020 Gl as s res istance too.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 6 2 / 67 2.8.5 Rea ding Definition of SIP and CIP pH ARC Senso r are counting specia l clea ning events su ch as sterilizations or clean ing cycles by means o f track ing typical t e m pera ture profiles (s ee chapter 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 6 3 / 67 Command: SI P definit ion Modbus ad dress: 4988 Len gth: 8 Type: 16 Write Parameter: T mi n [°C] T m ax [°C] Tim e mi n [min] Empty Format: Float Fl oat Float Float Value: 120 1 30 30 0 Figure 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 6 4 / 67 2.9 Sensor I dentifi cation and Inf ormation 2.9.1 Ge neral In formation General in f ormat ion abou t t he s ensor is a v a il ab l e as s how n in the fi gure be low.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manu al ( EPHUM011 ) 6243 00/01 page 6 5 / 67 Command: Ser i al nu m ber Mo dbus a ddress: 1312 Len gth: 8 Type: 3 Re ad Parameter: Te x t Format: Chara cter Value: 000 1001 Figure 2.9.2.2: Exa m p l e to read re gister 131 2.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manual (EPHUM01 1) 6243 00/01 page 6 6 / 67 Command: Info use r Modbu s address : 156 8 Leng th: 8 Type: 16 Write Parameter: Te x t Format: Chara cter Value: Hello Worl d Figure 2.9.3.2: Exa m p l e to w ri te 16 ASC II characters to re gister 1568 w i th operator A or S.
pH ARC Sen so rs Mod bus RTU Progra mm er ’ s Manual (EPHUM01 1) 6243 00/01 page 6 7 / 67 HAMILTON Bon aduz A G Via Crusch 8 CH-74 02 Bona duz Sw itzerl and Tel. +41 81 6 60 60 60 Fax +41 81 6 60 60 70 contact@ha mil ton. ch 05 May 201 0 www .ham iltonco mpany.
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