Siemens SITRANS RD500 Operating Instructions Manual page 25

• View: If set to "Yes", the channel will be visible in the overview screen. If "No", it will
not be shown in overview screen.
• The Input Filter is a time constant used to stabilize fluctuating input signals. This
property is specific to the module, rather than to a given input.
• The Enable field enables or disables each channel independently. Channels must be
enabled for them to function.
• The Name property allows a descriptive name to be applied to the I/O channel, e.g.
Tank 1 Level. Avoid using duplicate names.
• The Units are user defined in this text field. Units can be entered based on customer
application specific requirements.
• Decimals indicates the number of decimal places after the decimal in the data
displayed.
• The PV at 0% and PV at 100% properties scale the input signals. Enter the desired
PV reading for the minimum and maximum input signal levels. ie. For a 4-20 input
module, if the application involves a flow sensor with a 4-20 mA output proportional
to 5 to 105 GPM, enter 5 for the PV at 0% setting, and enter 105 for the PV at 100%
setting.
• The Scale Beyond PV Points property allows the PV value to continue extrapolating
beyond the PV at 0% and PV at 100% values if the input exceeds its typical limits. If
Scale Beyond PV Points is not checked, the PV value will only measure to its limits,
even if the signal is slightly outside of the measurement range.
• The Square Root property allows the unit to be used in applications in which the
measured signal is the square of the PV. This is useful in applications such as the
measurement of flow with a differential pressure transducer.
• The Log property is used to select the log file into which the channel's data is
recorded.
7ML19985MA01 SITRANS RD500 – OPERATING INSTRUCTIONS Page 23