Temperature Transmitters TF02/TF02-Ex (head mounted) and ...

Fieldbus CommunicationParameter(Access r = read/w = write)ALARM_SUMrACK_OPTIONr / wWRITE_PRIr / wWRITE_ALMrITK_VERrDescriptionThe current alert status, unacknowledged states, unreported states, and disabledstates of the alarms associated with the function block.Selection of whether alarms associated with the block will be automatically acknowledged.Priority of the alarm generated by clearing the write lock.This alert is generated if the write lock parameter is cleared.Major revision number of the interoperability test case used in certifying this device asinteroperable. The format and range of the version number is defined and controlledby the Fieldbus Foundation.Note:The value of this parameter will be zero (o) if the device has not been registered asinteroperable by the FF.Tab. 4-1Parameters of the Resource Block4.3 Transducer Block4.3.1 OverviewRJCORRECTIONLINEARISATIONSENSOR XCORRECTIONRJCOMP.LINEARISATIONCALIBRATIONCHANNEL XBIASFig. 4-2Transducer Block structureTransducer blocks insulate function blocks from the specifics of I/O devices, such as sensors, actuators, andswitches. Transducer blocks control access to I/O devices through a device independent interface defined foruse by function blocks. Transducer blocks also perform functions, such as calibration and linearization, on I/Odata to convert it to a device independent representation. Their interface to function blocks is defined as one ormore implementation independent I/O channels. Transducer blocks are defined to decouple function blocks fromthe local input/output functions required to read sensor hardware and command effector hardware. This permitsthe transducer block to execute as frequently as necessary to obtain good data from sensors without burdeningthe function blocks that use the data. It also insulates the function block from the manufacturer specific characteristicsof an I/O device. Transducer classes may be defined as grouping of blocks having common parametersand behaviour. Three basic classes of transducer blocks are:• Input Transducer Block - interfaces to physical measurements or inputs, processes these measurements andmakes its results available to input function blocks through channel reference.• Output Transducer Block - interfaces to output function blocks through channel reference and processes theirtarget output to regulate physical actuators or physical outputs.• Display Transducer Block - interfaces to local interface devices and allows the local interface access tofunction block parameters.20 Temperature Transmitters TF02/TF02-Ex (head mounted) and TF202/TF202-Ex (field mounted) 42/11-51 EN