Proline Promass 83E/F/O Operation Manual - FMC Technologies

Troubleshooting Proline Promass 83!Note!9.5 Response of outputs to errorsThe failsafe mode of totalizers, current, pulse and frequency outputs can be customized by meansof various functions in the function matrix. You will find detailed information on these proceduresin the "Description of Device Functions" manual.You can use positive zero return to set the signals of the current, pulse and status outputs to theirfallback value, for example when measuring has to be interrupted while a pipe is being cleaned. Thisfunction takes priority over all other device functions. Simulations, for example, are suppressed.Failsafe mode of outputs and totalizersProcess/system error is presentPositive zero return is activated" Caution!System or process errors defined as "Notice messages" have no effect whatsoever on the inputs and outputs. See the information on ä 40Current outputMIN. CURRENTThe current output will be set to the lower value of the signal on alarm level depending onthe setting selected in the CURRENT SPAN (see the "Description of Device Functions"manual).MAX. CURRENTThe current output will be set to the higher value of the signal on alarm level depending onthe setting selected in the CURRENT SPAN (see the "Description of Device Functions"manual).HOLD VALUEMeasured value display on the basis of the last saved value preceding occurrence of thefault.ACTUAL VALUEMeasured value display on the basis of the current flow measurement. The fault is ignored.Output signal corresponds to "zero flow"Pulse outputFrequency outputRelay outputFALLBACK VALUESignal output no pulsesHOLD VALUELast valid value (preceding occurrence of the fault) is output.ACTUAL VALUEFault is ignored, i.e. normal measured value output on the basis of ongoing flowmeasurement.FALLBACK VALUESignal output 0 HzFAILSAFE VALUEOutput of the frequency specified in the FAILSAFE VALUE function.HOLD VALUELast valid value (preceding occurrence of the fault) is output.ACTUAL VALUEFault is ignored, i.e. normal measured value output on the basis of ongoing flowmeasurement.The totalizers are paused until the error is rectified.ACTUAL VALUEThe fault is ignored. The totalizer continues to count in accordance with the current flowvalue.HOLD VALUEThe totalizers continue to count the flow in accordance with the last valid flow value(before the error occurred).In event of fault or power supply failure: relay de-energizedThe "Description of Device Functions" manual contains detailed information on relayswitching response for various configurations such as error message, flow direction, EPD,full scale value, etc.Output signal corresponds to "zero flow"Output signal corresponds to "zero flow"pNo effect on the relay outputPage 94 • MN0M022Issue/Rev. 0.2 (12/12)