Spectrum Controls 1769sc-IF8u - Manual (Page 54)

44 Compact IO ™ Universal Input module
+32767. See Determining Effective Resolution and Range within this
chapter.
Engineering Units x 1
When using this data format, the module scales the input data to the actual
engineering values for the selected input type. Values are expressed with
an assumed decimal place. Refer to Table 4.2 for details.
NOTE Use the engineering units x 10 setting to produce temperature
readings in whole degrees Celsius or Fahrenheit.
The resolution of the engineering units x 1 data format is dependent on the
range selected and the filter selected. See Determining Effective
Resolution and Range.
Engineering Units x 10
When using this data format, the module scales the input data to the actual
engineering values for the selected input type. Values are expressed in
whole units (i.e. no assumed decimal place) Refer to table 4.2 for more
details.
The resolution of the engineering units x 10 data format is dependent on
the range selected and the filter selected. See Determining Effective
Resolution and Range.
Scaled-for-PID
The value presented to the controller is a signed integer with 0
representing the lower input range and +16383 representing the upper
input range.
To obtain the value, the module scales the input signal range to a 0 to
+16383 range, which is standard to the PID algorithm for the MicroLogix
1500 and other Allen-Bradley controllers (e.g. SLC). For example, if type
J thermocouple is used, the lowest temperature for the thermocouple is -
210°C, which corresponds to 0 counts. The highest temperature in the
input range, 1200°C, corresponds to +16383 counts.
Percent Range
Input data is presented to the user as a percent of the specified range. The
module scales the input signal range to a 0 to +10000 range. For example,
using a type J thermocouple, the range -210°C to +1200°C is represented
as 0% to 100%. See Determining Effective Resolution and Range.