User Guide - Eurotherm Ltda

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nanodac RECORDER/CONTROLLER: USER GUIDE4.9 MODBUS MASTER CONFIGURATIONModbus master configuration is divided into two areas: a) setting up the slave(s), including diagnostics, andb) defining the locations of the parameters to be read. Figure 4.9 shows an overview.Section 3.4.12 shows the Modbus Master display page, and describes the configuration options availablethere.Note: Versions 2.40 to 2.50 of the Mini8 Controller, and versions 2.70 to 3.20 of the Model 3550 controllerare supported. It is not guaranteed that later software versions of these instruments will befully compatible.Select configuration menuSelect configuration menuProgrammerModbus MasterSlave 1Slave 2ProgrammerModbus MasterMainDiagnosticsSection 4.9.1Section 4.9.2EtherNet/IP1EtherNet/IPDigital I/O2Digital I/OUser Lin3User LinCustom Message4Custom MessageZirconia5ZirconiaSelect configuration menuProgrammerModbus MasterDataSection 4.9.3Data items that have been configured asother than ‘Off’ are indicated by a greentriangle in the top right-hand cornerEtherNet/IPDigital I/OUser LinCustom MessageZirconiaFigure 4.9 Modbus Master configuration top level menusPage 136HA030554Issue 7 Nov 12
nanodac RECORDER/CONTROLLER: USER GUIDE4.9.1 Slave Main menuThis allows the IP address, Unit ID and other communications parameters to be entered for Slaves 1 and 2.Modbus Master.Slave.1.MainDescriptorOnlineComms FailureIP AddressUnit IDSearch DeviceSearch ResultProfileRetriesTimeout (ms)Max Block SizeHigh PriorityMedium PriorityLow PrioritynanodacNo123.123.123.1111NoAvailablenanodac32501240.125 sec1 sec2 secsAvailable Priority selectionsSeconds0.1250.250.5125102030Minutes125102030Hours1Figure 4.9.1 Modbus Master Slave 1 configuration (Slave 2 similar)DescriptorOnlineComms FailureIP AddressUnit IDSearch DeviceSearch ResultProfileRetriesTimeoutMax Block SizeHigh PriorityMedium PriorityLow PriorityA descriptor for this instrument. For use in Modbus communications, this is not thesame as the ‘Name’ which appears in the Instrument Info configuration (Section 4.15).Disabled by default (Cross symbol). Must be enabled (highlighted using the down arrow,then edited by the scroll button) to allow the remaining configuration items to appearand to allow data transactions be processed. Setting the slave offline temporarilydisables data transactions - it does not reconfigure them.Active (yes) if a data item has failed to respond after all retries.The IP address of the Slave deviceThe Unit Id or Modbus address to use in each data transaction with the slave device.Limits are 1 to 255Setting this to ‘Yes’ searches the network to see if the device with the specified IP addressand Unit ID is available. If so, the descriptor will be overwritten to indicate whattype of device has been found.The status of the selected 'Search Device' request (Searching, Available, Unreachable).Search activity is indicated by a rotating animated display in the ‘Searching’ field.A number of profiles are held within the instrument that match a selection of known devices.If the device is ‘known’, its type, model number etc. is displayed. If the device isunknown, ‘3rd Party’ appears instead.The number of times (0 to 3) to re-send a data transaction to the device if no responseis received within the configured timeout period (below).The timeout period for each Modbus transaction in msThe maximum number of registers (16bit words) that a single data transaction is permittedto containThe interval rate between each high priority data transaction. Default = 0.125 second.The interval rate between each medium priority data transaction. Default = 1 second.The interval rate between each low priority data transaction. Default = 2 seconds.HA030554Issue 7 Nov 12Page 137
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