Chapter 4. ProgrammingTransPort ® PT900 User’s Manual 854.7.3b Digital Outputs (cont.)c. If Frequency was selected in the FUNCTION box:• Open the drop-down list in the MEASUREMENT box, and selecteither CH1 (Channel 1), CH2 (Channel 2), Average (Average ofCH1 and CH2) or General (General Function List) for the output.• Open the drop-down list in the DATA SOURCE box, and select thedesired data source (see Table 9 on page 83).• In the BASE VALUE and FULL VALUE boxes, enter the minimumand maximum values for the selected data source.• In the FULL FREQUENCY box, enter the data value whichcorresponds to the FULL VALUE frequency.• Open the drop-down list in the ERROR HANDLING box, and selecteither Low (force the output to 0 kHz), High (force the output to10 kHz), Hold (hold the last good value) or Other (force theoutput to a user-defined value).d. If Alarm was selected in the FUNCTION box:• Open the drop-down list in the MEASUREMENT box, and selecteither CH1 (Channel 1), CH2 (Channel 2), Average (Average ofCH1 and CH2) or General (General Function List) for the output.• Open the drop-down list in the DATA SOURCE box, and select thedesired data source (see Table 9 on page 83).• Open the drop-down list in the ALARM STATE box, and selecteither Normal (normally-open contacts) or Fail-Safe(normally-closed contacts).• Open the drop-down list in the ALARM TYPE box, and selecteither Low (alarm activates if a measurement is less than or equalto the programmed ALARM VALUE), High (alarm activates if ameasurement is greater than or equal to the programmed ALARMVALUE) or Fault (alarm activates on system fault condition).• In the ALARM VALUE box, enter the desired alarm trip point.
