Watlow PPC-2000 - Manual (Page 157)

PPC-2000 User’s Guide Chapter 3: Operating with AnaWin 3
Doc.# 30002-00 Rev 2.3 Watlow Anafaze 131
NOTE! The counter and frequency inputs update four times
per second (4Hz), except the Linear 0-300 (Hz) input
type, which updates once every 25 seconds (.04Hz).
The update rate of all other input types depends on
the module. See Chapter 7, Specifications.
Units
For temperature sensors, choose the temperature scale for the
input value. For custom linear and pulse type inputs, choose a
three-character description of the input’s engineering units.
Table 3.16 Units
Decimal Places
Set the Decimal Places parameter to determine how many
decimal places are entered and displayed in the Process Variable,
Set Point and alarm limits for channels with the corresponding
input selected as the PV Source. The range for Decimal Places is
limited by the range of the PV to be displayed. The more
decimal places to be displayed, the smaller the range of PV that
can be displayed. The greater the difference between the PV Lo
and PV Hi the fewer the decimal places that can be displayed.
Input Filter
Set the filter value to damp changes to the process variable.
The process variable used to calculate the outputs responds to
a step change by going to approximately 2/3 of its final value,
within the number of scans set here. A larger number yields a
slower, or more damped, response to changes as measured by
the sensor.
Range: 0 to 255 scans. 0 disables the filter.
PV Offset
Enter a number to adjust the reading of an Input Value. For
T/Cs and RTDs, the value entered here is added to the
temperature measurement. For counter inputs, the value set
here is loaded as the Input Value when it is entered. Enter 0 to
reset a counter.
Range: -32768 to 32767 (Decimal placement depends on Input
Type selected).
Input Character Sets for Units
T/C and RTD °F or °C
Linear or Pulse 0 to 9, A to Z,%, /, degrees, space