Thermoprozess MIKROTHERM 825 Manuale utente

MIKROTHERM®825

MT825-A,

Communications

MT825A/C11/09 Rev.3/Soft.4

THERMOPROZESS s.r.o.

Riegrova2668/6c

370 01 eskéBudějovice

tel.:+420 387 313182

fax:+420 385 340947

e-mail: info@thermoprozess.cz

internet: www.thermoprozess.cz

THERMOPROZESS

Communications

1Scopeofcommunications

Communicationlineenhancesusabilityofthecontrollerfromautonomouscontrollertothe

onewhichperformsthetasksinasystem. Basicfeasibilitiesaredescribedinthe5following

articles:

•Readingdatafromthecontroller, Prot = Mod. Enablestoacquiredata(SPvalues,

process values, ..)forPC, theirvisualdataprocessingandstoring. Theformforshowing

andpresentingdependsonthefeatures ofthevisualprogramused.

•Configurationofcontroller, Prot = Mod.IngraphicenvironmentofPCyoucan

easilyconfigureandsetparametersthataretransferredtoPCbyonecommand. The

configurationviaPCcanbeusedforexampleformoresophisticatedsettingofcontrollers

orforsettingofproductionlinebythetechnologyproceduresstoredinPC.

•ThecontrollersconfiguredinsystemMaster–Slave, Prot = SGnL.Thecontroller

MT825A-MASTERretransmitssetpointvalueandtheSLAVE -controllers(MT600)

receivethisvalueandprocess it. IncomparisonwithanalogretransmittheMASTER-

SLAVE systemhastheadvantageingalvanicisolationofcontrollersandtheprecisionof

transferringofSTPvaluein1decimalpoint.

•Cascadecontrolling, Prot = SGnL. Usedinprocess withlonglagtimesbetweenthe

energysource andprocess measuredvalue.

•Printingprotocolsofmeasurement, Prot = Prnt. Time, process andsetpointvalues

areshownonaprintedcopy, theformatisillustratedbelow.

************************

DATE: 20.08.1999

************************

time: sp: c:

15:47 852 850

15:57 860 859

16:07 868 868

16:17 876 877

16:27 884 884

16:37 892 892

16:47 900 901

16:57 900 900

17:07 oFF 889

17:17 oFF 852

Communications

2Communication interfaces

Thecontrollerscanbeequippedwithcommunicationinterface RS232 or EIA485.

Thebaudrateofthecommunicationispermanentlysetat9600 Bd,thedatabitsis8,

noparity, 1stopbit.

2.1Interface RS 232

Theinterface RS232 isintendedforthelink of1PCwith1controller. Maximumnetwork

lengthcanbe12 meters.ThewiringofstandardconnectorsDB-9andDB-25 onthesideof

PCisillustratedinthefollowing picture.

2.2Interface EIA485

Theinterface EIA485 issuitableforindustrialenvironment.Thelocalnetworkwiththis

interface canlink asmanyas32 controllerswithPCup tothedistance 1200 meters. When

repeatersareusedmorecontrollerscanbelinkedatlongerdistance. Inbasicwiring there

mustbeanappropriateconverterorPCcardfortransferringofinterface RS232 toEIA485 at

thesideofPC.

Ifcontrollersworkintheenvironmentwithlowinterference, thecommunicationlinecanbe

carriedoutwithtwistedpaircable. Thesimplestwiringofcommunicationlineillustrates the

followingpicture.

RS232

EIA485

Sideofcontroller

SideofPC

Communications

3Protocol MODBUS

ThecommunicationprotocolMODBUSisintendedforcreatingnetworks oftype„Master–

Slave“, when„Master“isPC, „Slave“arealwayscontrollers. Itscharacteristicissimple, but

reliablestructurewiththesefeatures:

•Definedlengthoftransmittedcommands.

•Identificationoftheterminalequipmentwiththeaddress (forMT825address 1to250).

•Thebackconfirmationofeachcommand.

•ThereportissecuredwithCRC code.

•Thetransferoferrorreports.

3.1Generalstructureofprotocol

Address of

controller Command

Address of registerand/ordata CRC

1byte 1byte nbytes 2bytes

ThecommandsforMT825:

•Read –03Hor04H

•Write to1register–06H

•Backinquiry –08H

3.2Operation-read

Thisoperationenablesreadingasmanyas32 registersinarowoneafteranother.Ifregisteris

notdefinedthecontrollerreturns thevalue–32000, iftheregisterisnotactive

thecontrollerreturnsthevalue–32001.

Command:

Address of

controller 03H Address of 1.readregister Numberof readregisters CRC

1byte 1byte

2bytes(1. bytehigher) 2 bytes(1. bytehigher) 2 bytes

Response:

Address of

controller 03H Numberof

bytes 1.readregister … Thelastreadregister CRC

1byte 1byte 1byte 2bytes(1. byte

higher) 2 bytes(1. bytehigher) 2 bytes

Example:readingofregister100(64H,setpointvalue), controller

attheaddress 12(0CH)

Command: 0C 03 00 64 00 01 C4 C8

Response: 0C 03 02 01 C8 95 83

Communications

3.3Operation-write (06H)

Thisoperationenableswritingavalueto1registerofcontroller:

Command:

Address of

controller 06H Address of register Data CRC

1byte 1byte 2bytes(1. bytehigher) 2 bytes(1. bytehigher) 2 bytes

Responseifthecommand isperformed(isidenticalwiththecommand):

Address of

controller06H Address of register Data CRC

1byte 1byte 2bytes(1. bytehigher) 2 bytes(1. bytehigher) 2 bytes

Example:writingtoregister100 (64H,setpointvalue), controllerattheaddress

12 (0CH)

Command: 0C 06 00 64 01 C8 C9 0E

Response: 0C 06 00 64 01 C8 C9 0E

Response, errorreport:

Address of

controller Command+

80H Errorreports CRC

1byte 1byte 1byte 2bytes

Errorreports:

•01 –errorofcommandentered,errorinCRC.

•02 –registerdoesnotexistorisintendedonlyforreading.

•03 –dataarebeyondthelimits.

•04 –writingtoregisterfailed(e.g. errorofhardware,too highinterference …)

Example:erroroftheregisterentered

Command: 0C 01 00 64 04 20 7F D0

Response: 0C 81 01 10 53

Example:error, theregisterdoesnotexist

Command: 0C 06 00 69 04 20 5B D3

Response: 0C 86 02 52 62

Example:error, databeyondthelimits

Command: 0C 06 00 64 4E 20 FD 70

Response: 0C 86 03 93 A2

3.4Operation-backinquiry:

Thisoperationisonlyintendedforthedetectionofthecontrollerattherelevantaddress.

Communications

Command:

Address of

controller 08H Data CRC

1byte 1byte 4bytes2bytes

Response:

Address of

controller 08H Data CRC

1byte 1byte 4bytes 2bytes

Example:back inquiry, controllerattheaddress 12 (0CH)

Command: 0C 08 0A 14 1E 28 AB 74

Response: 0C 08 0A 14 1E 28 AB 74

3.5Timingofcommunicationline

Ifthereismorethan1controllerontheline(onlylineEIA485)itisnecessarytoobservethe

timing showninthefollowingpicture.

Thetime interval (pausebetweenending ofreceiving andtransmittingofanothercommand)

mustbe moreorequalto 50ms. Inoppositecasethedatacollisionmightappear.

time

Transmitting

command Receiving

response

Transmitting of

another

command

Receiving

response

Interval >= 50 ms

Communications

4Overviewofregisters

Thetablecomprisesthetotaloverviewofregisters thatareaccessibleforcommunicationline.

Themeaning ofparticularparametersisthefollowing:

•Display …ifyousettherelevantparameterviakeyboard, onlowerdisplayappears

writingstatedinthecolumndisplay.

•Address …address ofregister.Theaccess forregisterisshownaftertheaddress,

r…readonly, r/w…readaswellaswrite.

•Range …rangeofregistervalues.

•Initiation …initialvalueatfirstpower-up orafterrestart.

•Decimalpoint …determinesthenumberofdecimalpointsthataretobedisplayed.

Theconversionshowsthefollowing table.

Decimal point Valueenteredwith

communicationline Displayreading Note

0 1800 Factorysetting,nodecimalpoint

1 180.0 Factorysetting,1decimalpoint

2 18.00 Factorysetting,2decimalpoint

dEC1 (0) 180 Bypar. dEC1 (nodec. point),inputtc, rtd

dEC1 (1) 1800 180.0 Bypar. dEC1 (1 dec. point),inputtc,rtd

dEC1 (0) 180 Bypar. dEC1 (nodec. point),inputprocess

dEC1 (1) 18.0 Bypar. dEC1 (1 dec. point),inputprocess

dEC1 (2) 1.80 Bypar. dEC1 (2 dec. points),inputprocess

dEC1 (3) 0.180 Bypar. dEC1 (3 dec. points),inputprocess

•Note …themeaning ofregisterismostlystated

Systemregisters

Display

Address Range Initiation Dec. point

Note

SoFt 0r Softwareversion

1r 0…2kB

1…32kB EmbeddedmemoryRAM for

datalogger

2r 0…tc

1…rtd

2…proc

Measuring input

3r 0…none

1…retransmit

2…communication

Controlinput,output

4r 0…SSD

1…relay

2…process

Controloutput

5r 0…none

1…relay Alarm/signaloutput

6r 0…none

1…1relay

2…2relay

3…3relay

Eventoutput

Communications

Display

Address Range Initiation Dec. point

Note

Aut 12 r/w 0… oFF

1… on 0 Start on,stopoFF

automaticsettingof PID

parameters

50 r Process value

upper display dEC1 Ifsensorisnotset,thecontroller

returnsthevalue–22000.

Ifthebadsensorisdetected

thecontrollerreturnsthevalue–

22001.

51 r Ambienttemperature 1 Thecontrollerreturnsonly

process/measuredvaluefor

thermocoupleinput

60 r Actualsetpointvalue

lower display dEC1 IfSP valueisOFF oFF,

thecontrollerreturnsthevalue-

22000

70 r PIDcontrolling:

0to1000

ON/OFF controlling:

0…switchedOFF

1…switchedON

Controloutput.

Powerat%forPIDcontrolling

Stateof theoutputforON/OFF

controlling

71 r 0…switchedOFF

1…switchedON Alarm/signaloutput

72 r 0…switchedOFF

1…switchedON Eventoutput1

73 r 0…switchedOFF

1…switchedON Eventoutput2

74 r 0…switchedOFF

1…switchedON Eventoutput3

80 r 0to9999 0 Totaltimeof thecontroloutput

inhours.

81 r 0to9999 0 Totalconsumptionof energy

inkWh. Afterreaching 9999 the

counterisresetandstartsfrom0.

82 r 0to9999 0 TotalconsumptioninkWhfor1

firing.Whenprogramisreleased

thecounterisresetandcounting

oftheconsumptionstartsfrom0.

Communications

Operationlevel

Display

Address Range Initiation Dec. point

Note

100 r/w SP1L to SP1h Setpointvalue,readingappears

onlowerdisplay

Pb1 110 r/w 10 to24990 200 dEC1 Proportionalband

It1 111 r/w 0to999

0… oFF 100 1 Integrativevalue

dE1 112 r/w 0to999

0… oFF 24 2 Derivativevalue

Pb2 113 r/w 10 to24990 200 dEC1 Proportionalband

It2 114 r/w 0to999

0… oFF 100 1 Integrativevalue

dE2 115 r/w 0to999

0… oFF 24 2 Derivativevalue

Ct1 116 r/w 1to250for ot1 =

ht, Cl

5to250for ot1 =

ht2, Cl2

0 Timecycle

hYS1 117 r/w 10 to2490 20 dEC1 Hysteresisforswitching

ON/OFF of thecontroloutput

CAL1 120 r/w -9990 to9990 0 dEC1 Calibrationof measuring input

o2Lo 130 r/w -4990 to o2hI for ALPr,

SGPr

-9990 to0pro AldE,

SGdE

-4990

-990

dEC1 Lowalarm/signalsetpoints

o2hI 131 r/w o2Lo to24990pro

AlPr, SGPr

0to9990pro AldE,

SGdE

24990

990 dEC1 Highalarm/signalsetpoints

hPEr 140 r/w 1…120 10 0 Periodof datastoringinminutes

hSto 141 r/w 0… oFF

1… ProG

2… AlSG

3… Cont

1 Conditionfordatastoring

PPEr 142 r/w 1to120 10 0 Periodforprintingprotocolon

theprinterinminutes

PSto 143 r/w 0… oFF

1… ProG

2… AlSG

3… Cont

1 Conditionforprinting

Communications

Configuration level

Display

Address Range Initiation Dec. point

Note

In1 200 r/w Thermocoupleinput:

0… no

1… J

2… K

3… t

4… n

5… E

6… r

7… S

8… b

9… C

10 … d

RTDinput:

0… no

1… rtd

Process input:

0… no

1… 0-20

2… 4-20

3… 0-5

4… 1-5

5… 0-10

0 Settingof theinputsensor

dEC1 201 r/w tcandrtdinput:

0… 0

1… 0.0

Process input

0… 0

1… 0.0

2… 0.00

rL1 202 r/w -4990 to rh1 -4990 dEC1 Lowrangeof process input

rh1 203 r/w RL1 to24990 24990 dEC1 Highrangeof process input

Ftr1 204 r/w 0to600

0… oFF 10 1 Inputfilter

ot1 210 r/w 0… ht

1… CL

2… ht2

3… CL2

0forSSD

andproc

2prorelay

Settingof thecontroloutput

PLd1 211 r/w 0to100 100 0 Outputpowerlimitbelow SPL1

SPL1 212 r/w -4990 to24990 250 dEC1 SP valueforpowerlimitfunction

PLu1 213 r/w 0to100 100 0 Outputpowerlimitabove SPL1

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