Comtrol DeviceMaster UP – Modbus Server User guide

Comtrol
Brand
Comtrol
Model
DeviceMaster UP – Modbus Server
Category
Networking
Type
User guide
Modbus
®
Server
UserGuide
TrademarkNotices
Comtrol,DeviceMaster,andPortVisionareregisteredtrademarksofComtrolCorporation.
EthernetisaregisteredtrademarkofDigitalEquipmentCorporation,Intel,andXeroxCorporation.
ModbusisaregisteredtrademarkofSchneiderElectric.
PLCisaregisteredtrademarkofAllen‐BradleyCompany,Inc.
Otherproductnamesmentionedhereinmaybetrademarksand/orregisteredtrademarksoftheirrespectiveowners.
SecondEdition,January7,2011
Copyright©2010‐2011.ComtrolCorporation.
AllRightsReserved.
ComtrolCorporationmakesnorepresentationsorwarrantieswithregardtothecontentsofthisdocumentortothe
suitabilityoftheComtrolproductforanyparticularpurpose.Specificationssubjecttochangewithoutnotice.Some
softwareorfeaturesmaynotbeavailableatthetimeofpublication.Contactyourresellerforcurrentproduct
information.
Document Number: 2000535 Rev B
DeviceMasterModbusServerUserGuide:2000535Rev.B TableofContentsiii
Table of Contents
ModbusServerApplicationOverview........................................................................................................ 5
RecommendedChassis ................................................................................................................................................................ 5
TermsandDefinitions ................................................................................................................................................................. 6
WhatisModbus? ............................................................................................................................................................................ 7
Modbus/RTU(SupportedbyModbusServer) ...................................................................................................................................7
Modbus/TCP(NotsupportedbyModbusServer)............................................................................................................................7
ModbusServerFunctionality..................................................................................................................................................... 8
InstallationOverview ....................................................................................................................................11
InstallingPortVisionPlus .........................................................................................................................................................11
ConfiguringtheNetworkSettings ..........................................................................................................................................12
UploadingModbusServer.........................................................................................................................................................14
EmbeddedWebPages................................................................................................ ....................................15
ConfigurationOverview ............................................................................................................................................................15
ServerCon fig uration(Main)Page .........................................................................................................................................16
SerialInterfaceConfigurationPage.......................................................................................................................................17
EditPortConfigurationPage ..................................................................................................................................................................18
EditNetworkConfigurationPage...........................................................................................................................................21
EmbeddedDiagnosticandStatisticsPages.............................................................................................23
KnownModbus/RTUDeviceListWebPage .......................................................................................................................23
SerialInterfaceCommunicationsStatisticsPage ..............................................................................................................2 4
SerialInterfaceLogsPage.........................................................................................................................................................26
TroubleshootingandTechnicalSupport.................................................................................................27
TroubleshootingChecklist ......................................................................................................................................................27
GeneralTroubleshooting ..........................................................................................................................................................28
DaisyChainingDeviceMaster2E/4PortUnits..................................................................................................................29
TechnicalSupport........................................................................................................................................................................30
ivTableofContents DeviceMasterModbusServerUserGuide:2000535Rev.B
TableofContents
DeviceMasterModbusServerUserGuide:2000535Rev.B ModbusServerApplicationOverview5
ModbusServerApplicationOverview
ThissectiondefinesthesoftwarefunctionalityfortheModbusServerapplication.
TheModbusServerapplicationwasdesignedtoprovideenhancedconnectivityforOPC
serversandapplicationsthatrequireModbus/RTUcommunications.Whilestandard
gatewaysprovideconnectivityforonlyoneapplicationperserialport,ModbusServer
providesconnectivityforuptosixapplicationsperserialport.
ModbusServerwasdesignedtogreatlyenhancesystemmaintenancecapabilities.
Includedarecomprehensivedeviceandportspecificdiagnosticwebpagesthatdisplay
status,messageresponsetiming,timeout,andothererrorcounts,andoverallmessage
statistics.Aseriallogisalsoincludedtoprovidemessageleveldiagnosis.
RecommendedChassis
ThefollowingtableliststherecommendedDeviceMasterRTSorDeviceMasterUPchassis
basedonModbus/RTUmessagethroughput.
Note: TheseestimatesarebasedonaModbus/RTUrequestand/orresponsemessagesize
of20bytes.Actualthroughputwillvarydependingonmessagesizeandsystem
requirements.
Throughput 1Port 2Ports 4Ports 8Ports 16Ports 32Ports
VeryHigh‐Messagerateof
uptoonemessageevery50
msperport(20messages
perportpersecond)
XX
High‐Messagerateofupto
onemessageevery100ms
perport(10messagesper
portpersecond)
XX X
Medium‐Messagerateofup
toonemessageevery200ms
perport(5messagesper
portpersecond)
XX X X
Low‐Messagerateofupto
onemessageevery500ms
perport(2messagesper
portpersecond)
XX X X X
VeryLow‐Messagerateof
uptoonemessageevery
secondperport(1message
perportpersecond)
XX X X X X
Latency
Transmit(Fromapplication
todevi ce)
2‐10ms(*) 5‐20ms(*)
0‐30ms(*)
Receive(Fromdeviceto
application
2‐10ms(*) 5‐20ms(*) 5‐50ms
10‐100ms
(*)=BasedononeEthernetTCP/IPconnectionperserialportr
unninginanormal
uncongestedsystem.Themaximumoveralllatencywillincreaseasthenumberof
EthernetTCP/IPconnectionsincrease.
6ModbusServerApplicationOverview DeviceMasterModbusServerUserGuide:2000535Rev.B
TermsandDefinitions
TermsandDefinitions
Term Definition
Master(orClient)Mode
ThemethodofoperationwhenaDeviceMasteroran
applicationisoperatingasa“Master”orthemessage
originator.
Slave(orServer)
ThemethodofoperationwhenaDeviceMasteroran
applicationisoperatingasa“Slave”orthemessage
receiver.
Modbus/RTU
ThestandardModbusmessages,inhexadecimal
format,thataretypicallytransmittedoverseriallines
butcanalsobetransmittedoverothercommunication
methodssuchaswirelessorEthernetTCP/IPsocket
connections.
Note: Modbus/RTUoverEthernetTCP/IPisnotthe
sameasModbus/TCP.
Polling
Theprocesswhereanapplicationrequestsdataona
continualbasis.InthisoperationtheMastersendsthe
requestmessageswhiletheSlaverespondstothe
messages.
Sockets
Themethodusedtocommunicatebetweendevices
whilecommunicatingoverEthernetTCP/IP.
DeviceMasterModbusServerUserGuide:2000535Rev.B ModbusServerApplicationOverview7
WhatisModbus?
WhatisModbus?
Modbus/RTU
(SupportedbyModbus
Server)
Modbus/RTUisnativeModbusinhexadecimalformat.ThesearethebaseModbus
messagesthatcontainsimplereadandwriterequests.Theformatisasfollows:
Where:
• ThetermsMasterorClientareusedtoidentifythesenderofthemessage.
• ThetermsSlaveorServerareusedtoidentifythedevicesrespondingtothemessage.
Modbus/RTUisusedfor:
• Serialportconnectivity.RS‐485isthemostcommon,butRS‐232andRS‐422arealso
used.
• EthernetTCP/IPsocketconnections.ThisisnotthesameasModbus/TCP(pleasesee
nextsection),butdoesprovideaverysimplemethodofinterfacingtoremotedevices.
ItisusedbymanyapplicationsandsomeOPCservers.Note:Thiscommunication
methodisnotusedbyPLCs.
Modbus/TCP(Not
supportedbyModbus
Server)
Modbus/TCPisanEthernetnetworkbasedprotocolthatcontainsaModbus/RTU
message,withtheexceptionofthe2byteCRC.TheModbus/TCPmessagecontainsa
headerwithinformationdesignedtoprovidemessageidentificationandrouting
information.Theformatisasfollows:
Where:
• ThetermsMasterorClientareusedtoidentifythesenderofthemessage.
• ThetermsSlaveorServerareusedtoidentifythedevicesrespondingtothemessage.
• Modbus/TCPmessagesaretypicallysenttoandreceivedonadefinedEthernetTCP/
IPsocketof502.
• Modbus/TCPimplementationsprovidemorecapability,butalsorequiremore
processingthansimplerModbus/RTUimplementations.
Modbus/TCPisusedforconnectingadvancedEthernetbaseddevices,suchasPLCs,HMIs,
SCADASystems,andmostOPCServersto:
• OtherEthernetdevicessupportingModbus/TCP.
• RemoteserialModbus/RTUdevicesthroughgateways(suchastheDeviceMasterUP).
• RemoteserialorEthernetTCP/IPASCIIdevicesthroughagateway(suchasthe
DeviceMasterUP).
Note: RefertotheDeviceMasterUPforModbus/TCPfunctionality.
8ModbusServerApplicationOverview DeviceMasterModbusServerUserGuide:2000535Rev.B
ModbusServerFunctionality
ModbusServerFunctionalit y
TheModbusServerapplicationprovidesthefollowingfunctionality:
• SupportsModbus/RTUoverEthernetTCP/IPconnectionstothecorrespondingserial
portthroughintelligentModbusmessagehandlingandrouting.
• SupportsonlyModbus/RTUoverEthernetTCP/IPconnectionstoaserialport.
Note: ForModbus/TCPfunctionality,refertheDevice MasterUP
.
• SupportsuptosixEthernetTCP/IPconnectionstoeachserialport.
‐ OneTCP/IPconnectioncanbecreatedwiththeConnectToconnectionmethod.
‐TheListenconnectionmethodacceptsuptofiveorsixconnections,dependingif
theConnectToconnectionisactive.
• Supportsupto255Modbusdevicesperport.Bothvalid,(1‐247),andreserved,(248‐
255),deviceIdsaresupported.
• Modbus/RTUspecificmessagehandling:
‐ CRCverificationofallmessagesreceivedontheTCP/IPandserialinterfaces.
‐ TimingoutofresponsesfromslaveModbus/RTUdevices.
‐ Broadcastmessagehandlingonconnectedportonly.
• Systemmonitoringtoensuregatewayoperation:
‐Gatewaybusy.
‐ Applicationmessagetime‐outs.
• Advanceddiagnosticswebpages:
‐ Modbus/RTUdevicespecificstatisticsandstatus.Upto255Modbus/RTUdevices
perportcanbemonitoredsimultaneously.
‐ Serialportspecificstatistics,responsetiming,andstatus.
‐Serialportmessagelogging.
DeviceMasterModbusServerUserGuide:2000535Rev.B ModbusServerApplicationOverview9
ModbusServerFunctionality
• Combinedwithaserialportredirector,suchastheComtrolSecurePortRedirector,
cansupportuptosixCOMportconnectionstoeachserialport.
10ModbusServerApplicationOverview DeviceMasterModbusServerUserGuide:2000535Rev.B
ModbusServerFunctionality
DeviceMasterModbusServerUserGuide:2000535Rev.B InstallationOverview11
InstallationOverview
UsethissectiontolocatesoftwareandinstallationdocumentationfortheDeviceMasterto
quicklyinstallandconfigureModbusServer.
Aninstallationfollowsthesebasicsteps.
1. ConnecttheDeviceMastertothe
network.
Ifnecessary,usetheappropriate
hardwareinstallationdocumentfor
yourDeviceMaster.
2. InstallPortVisionPlusfromtheCD
ordownloadandinstallthelatest
version.
YoucanrefertotheInstalling
PortVisionPlussubsectiontolocatePortVisionPlusandinstalliteasily.
3. ConfiguretheDeviceMasternetworksettingsusingPortVisionPlus(Configuringthe
NetworkSettingsonPage12).
4. YoumustuploadtheModbusServerfirmwareintotheDeviceMasterusing
PortVisionPlus(UploadingModbusServer
onPage14).
5. ConfiguretheportcharacteristicsusingtheDeviceMasterembeddedwebpage
(EmbeddedWebPages
onPage15).
6. Connectanyserialdeviceordevicesusingtheappropriatehardwareinstallation
documentforyourDeviceMaster.
InstallingPortVisionPlus
UsePortVisionPlustoidentify,configure,update,andmanagetheDeviceMasteronthe
followingoperatingsystems:
• WindowsXP
• WindowsServer2003
• WindowsVista
• WindowsServer2008
• Windows7
PortVisionPlusrequiresthatyouconnecttheDeviceMastertothesamenetworksegment
astheWindowssystemduringtheconfigurationprocess.
Note: IfyouhaveapreviousversionofPortVisionPlusonyoursystem,usetheControl
PaneltoremovePortVisionPlusbeforeinstallingthelatestversion.
UsetheSoftwareandDocumentationCDthatcamewiththeDeviceMastertocheckforthe
latestversionofPortVisionPlusorusethelinkbelowtodownloadthelatestversion.
1. Executethepvplus_[version].msifileandfollowtheinstallationwizardusingoneof
thefollowingmethods:
• CDInstallation:UsetheCDmenusystemtochecktheversionontheCDagainst
thelatestreleasedversion.
• Downloadthelatestversion:ftp://ftp.comtrol.com/dev_mstr/portvision_plus/
.
2. ClickLaunchandFinishinthelastinstallationscreen.
HardwareInstallationDocuments Web
DeviceMasterInstallationand
ConfigurationGuide
DeviceMasterUPHardware
InstallationandConfigurationGuide
12InstallationOverview DeviceMasterModbusServerUserGuide:2000535Rev.B
InstallationOverview
3. ClickScansothatPortVisionPluslocatestheDeviceMaster.
Note: PortVisionPluslocatesallDeviceMastermodels,including:theDeviceMaster
500,DeviceMasterAIR,DeviceMasterPRO,DeviceMasterRTS,DeviceMaster
SerialHub,andDeviceMasterUP.
4. GotoStep4
inthenextsection,ConfiguringtheNetworkSettings,toprogramthe
DeviceMasternetworksettings.
IfyouneedadditionalinformationaboutPortVisionPlus,refertotheHelpsystem.
ConfiguringtheNetworkSettings
UsethefollowingproceduretochangethedefaultnetworksettingsontheDeviceMaster
foryournetwork.
Note: TechnicalSupportadvisesconfiguringonenewDeviceMasteratatimetoavoid
devicedriverconfigurationproblems.
ThefollowingprocedureshowshowtoconfigureasingleDeviceMasterconnectedtothe
samenetworksegmentastheWindowssystem.
1. Ifyouhavenotdoneso,installPortVisionPlus(InstallingPortVisionPlus
onPage11).
2. StartPortVisionPlususingthePortVision PlusdesktopshortcutorfromtheStart
button,clickPrograms,Comtrol,PortVision Plus.
3. IfthisisthefirsttimeyouhaveopenedPortVisionPlus,clickScanandthenYesto
locateDeviceMastersonthenetwork.
Note: PortVisionPluswilllocateallComtrolDeviceMastermodels,including:
DeviceMaster500.DeviceMasterAIR,DeviceMasterPRO,DeviceMasterRTS,
DeviceMasterSerialHub,andDeviceMasterUP.
4. HighlighttheDeviceMasterforwhichyouwanttoprogramnetworkinformationand
opentheConfigure Devicescreenusingoneofthesemethods.
• Double‐clicktheDeviceMasterintheListViewpane.
•ClickConfig.
• Right‐clicktheDeviceMasterintheListViewpaneandclickConfigure Device.
Note: SeethePortVisionPlusHelpsystemfor
informationaboutusingPortVision
Plus.
DefaultNetworkSettings
IPaddress:
192.168.250.250
Subnetmask:
255.255.0.0
Gatewayaddress:
192.168.250.1
TreeView
ListView
DeviceMasterModbusServerUserGuide:2000535Rev.B InstallationOverview13
ConfiguringtheNetworkSettings
5. Optionally,renametheDeviceMasterintheDevice Namefield.
6. ChangetheDeviceMasternetworkpropertiesasrequiredforyoursite.
• IfyouwanttoruntheDeviceMasterusingtheMACaddressingscheme,click
Disable IP.
•TousetheDeviceMasterwithDHCP,clickDHCP IP,andmakesurethatyou
providetheMACaddressofthedevicetothenetworkadministrator.Makesure
thattheadministratorreservestheIPaddress,subnetmaskandgatewayaddress
oftheDeviceMasterintheDHCPserver.
• ToprogramastaticIPaddress,clickStatic IPandentertheappropriatevaluesfor
yoursite.
Note: Foradditionalinformation,openthePortVisionPlusHelpsystem.Accessthe
HelpsystemusingtheHelpbuttonorgodirectlytothehelpforaspecific
propertypagebyclickingtheContextmenubutton( ).
7. ClickApply ChangestoupdatethenetworkinformationontheDeviceMaster.
8. Optionally,clickSave Settings to a File tocreateaconfigurationfilethatyoucanuseto
configureotherDeviceMasters.
IfyouaredeployingmultipleDeviceMastersthatsharecommonvalues,youcansave
theconfigurationfileandloadthatconfigurationontootherDeviceMasters.
9. ClickClosetoexittheConfigureDevicewindow.
14InstallationOverview DeviceMasterModbusServerUserGuide:2000535Rev.B
InstallationOverview
UploadingModbusServer
UsethissectiontouploadModbusServerontheDeviceMasterusingPortVisionPlus.
1. MakesurethatyouhavelocatedordownloadedthelatestModbusServerversion
.
2. Right‐clicktheDeviceMasterforwhichyouwanttoupdate,clickUpload Firmware,
browsetotheModbusServer.binfile,andthenclickOpen.
3. ClickYe stotheUploadFirmwaremessagethatwarnsyouthatthisisasensitive
process.
Itmaytakeafewmomentsforthefirmwaretouploadontothedevice.Thedevicewill
rebootitselfduringtheuploadprocess.
4. ClickOk totheadvisorymessageaboutwaitingtousethedeviceuntilthestatusreads
ON-LINE.Inthenextpollingcycle,PortVisionPlusupdatestheListViewpaneand
displaysthenewSocketServerversion.
DeviceMasterModbusServerUserGuide:2000535Rev.B EmbeddedWebPages15
E m b e dde d WebPages
Allconfigurationandstatusinformationisprovidedthroughembeddedwebpagesfor
ModbusServer.
Note: ThelatestModbusServerfirmwaremustbeinstalledbeforeyoucanconfigure
networkorserial/socketportcharacteristics.
Forfirmwareinstallationandsetupinformation,seeInstallationOverview
onPage11or
thePortVisionPlushelpsystem.
Thissectiondiscussesthefollowing:
• Configurationoverview(below)
• ServerConfiguration(Main)Page
onPage16
• SerialInterfaceConfigurationPage
onPage17
• EditPortConfigurationPage
onPage18
• EditNetworkConfigurationPage
onPage21
SeetheEmbeddedDiagnosticandStatisticsPages(Page23)sectionforinformationabout
locatingdiagnosticandstatisticsforModbusServer.
ConfigurationOverview
ThefollowingoverviewshowshowtoaccesstheDeviceMasterServerConfiguration
embeddedwebpageandconfigureserialdeviceinterfaces.
Note: IfyouhavenotconfiguredthenetworkinformationintotheDeviceM asterduring
initialsetup,youmustconfigurethenetworkinformationbeforeconfiguringport
characteristics.
1. FromPortVisionPlus,highlightthe
DeviceMasterthatyouwanttoconfigureand
selectWeb Manager.
2. Optionally,entertheIPaddressofthedevicein
theAddressboxofyourwebbrowse.
3. SelectSerial Interface Configuration.
4. SelecttheappropriateporttoaccesstheEdit
PortConfiguration pageforthatport.
5. Changetheserialportconfigurationproperties
asrequiredforyoursite.
16EmbeddedWebPages DeviceMasterModbusServerUserGuide:2000535Rev.B
ServerConfiguration(Main)Page
ServerConfiguration(Main)Page
AccessthemainDeviceMasterwebpage(Server
Configuration)fromPortVisionPlusorentertheIP
addressoftheDeviceMasterintheAddress boxof
yourwebbrowser.
TheServerConfigurationpagedisplaysthesoftware
versionandcurrentnetworkconfigurationforthe
DeviceMaster.
Inaddition,theServerConfigurationpagelinkstothe
configuration,statistics,anddiagnosticspages,which
arediscussedinthetablebelow.
ServerConfigurationPage
Software
ModbusServerfirmwareversion
currentlyrunningonthe
DeviceMaster.
IP Config
TypeofIPconfigurationcurrently
inuse(staticorDHCP).
IP Address
IP Netmask
IP Gateway
IPaddress,netmask,andgateway
configuredintheDeviceMaster.
Serial Interface
Configuration
OpenstheSerialInterface
ConfigurationPage(Page17),
whichprovidesanoverviewofthe
serialinterfacesettingsand
providesaccesstotheEditPort
Configurationpageforserialport
configurationontheselectedport.
Communication
Statistics
OpenstheSerialInterface
CommunicationsStatisticsPage
(Page17),whichcontainsserial
interfaceandapplication
connectionstatistics.
Display Serial
Logs
OpenstheSerialInterfaceLogs
Page(Page26),whichcontainsthe
statisticsanderrorreporting
informationforeachport.
Configure
Network
OpenstheEditNetwork
ConfigurationPage
(Page21),
whichcanbeusedtomodify
DeviceMasternetwork
configurationafterinitial
configurationusingPortVision
Plus.
Display All
Known
Modbus/RTU
Devices
OpenstheKnownModbus/RTU
DeviceListWebPage(Page23),
whichdisplaysallknown
Modbus/RTUdeviceattachedtoall
serialports.
Reboot RebootstheDeviceMaster.
DeviceMasterModbusServerUserGuide:2000535Rev.B EmbeddedWebPages17
SerialInterfaceConfigurationPage
SerialInterfaceConfigurationPage
TheSerialInterface
Configurationpageprovides:
• Linkstothefollowing
pages:
‐ ServerConfiguration
(Main)Page(Page
16)
‐ SerialInterface
Communications
StatisticsPage(Page
24)
‐ SerialInterfaceLogs
Page(Page26)
‐ KnownModbus/RTU
DeviceListWebPage
(Page23)forall
portsoraspecific
port.Clickingthe
DisplayDevices(all)
linkortheDisplay
Devicesforaspecific
port.
• AccesstotheEditPort
Configurationpagefor
eachport(Port#)
• Anoverviewofserial
deviceconfiguration
settingsforeachport,
whichdisplaysthe
currentsettings
Note: TheApplicationTCP
ConnectionStatus
displaystheRemote
Connections.
UptosixactiveTCP/IP
connectionsforeach
serialportmaybe
displayedatonetime.
Tochangeanysettingsfora
port,selectthecorrespondingPort #link,whichopenstheEditPortConfigurationpage.
Select the appropriate serial
port number to configure the
serial port characteristics.
18EmbeddedWebPages DeviceMasterModbusServerUserGuide:2000535Rev.B
EditPortConfigurationPage
EditPortConfiguration
Page
UsetheEditPortConfigurationpagetochangeaserialport’sconfigurationparameters.
ToaccesstheEditPortConfigurat ionpage,selecttheappropriateportnumberlink(for
example,Port1)ontheSerialInterfaceConfigurationpage.
UsetheSerial Configurat ionareaoftheEditPortConfigurationpagetoconfigureserial
portcharacteristicsforthedevicethatyouplanonconnectingtotheport.
DeviceMasterModbusServerUserGuide:2000535Rev.B EmbeddedWebPages19
EditPortConfigurationPage
Name Value(s) Description
SerialConfiguration
Mode
Allmodels,except2‐port
models:
• RS232(default)
• RS‐422
• RS‐485
2‐portmodels:
• RS232(default)
• RS‐422
• RS‐485_2‐wire
• RS‐4854‐wire
Master
• RS‐4854‐wireSlave
Selectableserialmodeofcommunications.
Baud Rate
300,600,1200,2400,
4800,9600,19200,
38400(default),57600,
115200,230400
Selectableserialportbaudrates.
Parity
None(default)
Even
Odd
Selectableparityvalues.
Data Bits 5,6,7,8(default) Selectabledatabitvalues.
Stop Bits 1(default)or2 Selectablestopbitvalues.
Flow
None(default)
RTS/CTS
XON/XOFF
Half‐Duplex
Selectableflowcontrolvalues.
Rx Timeout
Between
Packets
0‐65535
(default=50)
Receivetime‐outsbetweenpacketsin
milliseconds.Thisisthemaximumspacing
betweenreceivedbytesallowedbefore
Modbus/RTUmessages/responses
receivedoverboththeserialandEthernet
TCP/IPinterfaceareexpectedtobe
complete.
Note: Ifthisvalueissettoolow,incomplete
and/orinvalidModbus/RTU
messagesmaybeincorrectly
detected.
Duplicate
Serial
Configuration
For All Ports.
N/A
Ifselected,willapplytheserialport
configurationtoallserialports.
20EmbeddedWebPages DeviceMasterModbusServerUserGuide:2000535Rev.B
EditPortConfigurationPage
Modbus/RTUProtocolSettings
Device
Response
Timeout
0to65535ms.
(Default=1000ms)
Themaximumallowabletimeforaslave
Modbus/RTUtorespondtoamessage
beforethemessageisconsideredtimedout.
Discard Rx
Packets With
Errors
On/Off
(Default=On)
Ifselected,theDeviceMasterwilldropall
packetsreceivedwithparity,framing,or
overrunerrors.
Note: Modbus/RTUmessageswithinvalid
CRCswillalwaysbediscarded
independentofthissetting.
Duplicate
Modbus/RTU
Protocol for All
Ports.
N/A
Ifselected,willapplytheModbus/RTU
protocolsettingstoallserialports.
ApplicationTCPConnectionConfiguration
Enable
On/Off
(Default=On)
Ifselected,thisTCP/IPsocketinterfacewill
beenabled.
Listen
On/Off
(Default=On)
Ifselected,theTCP/IPsocketinterfacewill
listenforaconnectionatthespecified
Listen Port.
Listen Port
1‐65535
Default:
Port1=8000
Port2=8001
Port3=8002
..
..
PortN=800N‐1
IfEnableandListenarebothselected,
allowsacceptanceof:
Uptosixconnectionsfromexternal
applicationsifthereisnoactiveConnect-to
connection.
Uptofiveconnectionsifthereisanactive
Connect-toconnection.
Connect to
Mode
Never
Connect‐Always
(Default=Never)
IfEnableisselected,thissettingdetermines
howtoconnecttoanapplication.
IfNever,donotattempttomakea
connection.
If
Connect-Always:Alwaysattemptto
maintainaconnectiontotheapplicationat
Connect IP AddressandConnect Port.
Connect Port
1to65535
(Default=0)
Socketporttoconnectto.Usedin
conjunctionwithConnect to Modeand
Connect IP Address.
Connect IP
Address
StandardIPaddress
format:
xxx.xxx.xxx.xxx
IPAddressofapplicationtocreatea
connection.Usedinconjunctionwith
Connect to ModeandConnect Port.
Disconnect
Mode
Never
Idle
(Default=Never)
Modeonwhichtodisconnectfromthe
application.
Never–Willnotdisconnectwhen
connection(s)areidle.(Typicallyusedin
ListenandConnect-Alwaysmodes.)
Idle–UtilizestheIdle Timertodetermine
whentoclosetheconnection.
Name Value(s) Description
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Comtrol DeviceMaster UP – Modbus Server User guide

Comtrol
Brand
Comtrol
Model
DeviceMaster UP – Modbus Server
Category
Networking
Type
User guide
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