User Guide - Eurotherm Ltda

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