User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE4.9.2 Slave Diagnostics Menu (Cont.)DEVICE STATUS (Cont.)Idle: This data item is currently idle and not communicating with the slave deviceIllegal Code: The slave does not support the function code transmitted by the master.Pending: The request is waiting to be sent, the most likely cause being that the slavedevice has not been set to onlineLoopback Test If set to ‘Yes’, Sends a function code 8 transaction to the slave, and waits for a response.TotalA count of all the transactions sent to the slave including reads, writes both good andfailed transactions.Successful A count of all the successful transactions sent to the slave.FailuresA count of all the unsuccessful (failed) transactions sent to the slave. May be caused byIllegal Function, Illegal Address etc. failures, as detailed belowRetriesThe number of transactions that were re-sent because of timed out responses from theslave devices.TimeoutsA count of all the transactions sent to the slave for which no response was received withinthe configured timeout period.Illegal Function A count of all the transactions sent to the slave that the slave claimed contained aninvalid function code. Exception code (1).Illegal Address A count of all the transactions sent to the slave that the slave claimed contained aninvalid Modbus register address. Exception code (2).Illegal Data A count of all the transactions sent to the slave that the slave claimed contained aninvalid value. Exception code (3)Slave Failure A count of all the times this slave device has failed to communicate. Exception code (4)No Gateway Path A count of all the times it has not been possible to access the slave device as it is on anothernetwork that requires a gateway for accessMaster Rejects A count of all the transactions that the Modbus Master has refused to send to the slavedue to invalid configuration dataResetA one shot action that immediately resets all diagnostics counts.4.9.3 Modbus master data configurationThis is the area of configuration in which the individual data items are selected for transmission across theModbus master communications link. The configuration fields that appear depends on the parameter selected,so the examples given here will probably not match those that appear to the user. The parametersthat appear in the ‘parameter List’ scroll menu depends on the slave model.EXAMPLE 1: TARGET SP1 WITH NANODAC SLAVESelect configuration menuModbus Master.1.DataProgrammerDataDescriptorData Item 1Modbus MasterPV0.00EtherNet/IPStatusSuccessDigital I/OSlave DevicenanodacUser LinParameter ListTarget SPCustom MessageNumber1ZirconiaPriorityMediumFigure 4.9.3a Target SetpointHA030554Issue 7 Nov 12Page 139