4 Special Functions
3-92 SmartAXIS Touch User's Manual
Data type
The analog value can be handled in the range of the specified data type (minimum to maximum values). The data
types are as follows.
Analog Value Linear Conversion Minimum and Maximum
When Data Type is set to Optional range, these values set the minimum and maximum values when performing a
linear conversion of the analog value. The minimum and maximum values can be set to any value in the range of -
32,768 to 32,767. However, the minimum value must be set to a value smaller than the maximum value.
Analog Input Value Linear Conversion Range When Set to Celsius or Fahrenheit
When data type is set to Celsius or Fahrenheit, the analog input value is linearly converted in the range in the
following table.
Storage Location for the Analog Value and Analog Status
The special data registers that store the analog value and analog status for the analog inputs or analog outputs
expanded by using an analog cartridge are allocated as follows. These values are updated with each scan.
Data Type Description
Binary data Analog values can be handled in the range of 0 to 4,095.
Optional range
Analog values can be handled in the range of minimum to maximum values. The minimum and
maximum values can be set in the range of -32,768 to 32,767. For the minimum and maximum
values, refer to the analog value linear conversion minimum and maximum.
Celsius Analog values can be handled in the linear conversion range of the temperature sensor set in the
data type.
For details, refer to the analog input value linear conversion range when set to Celsius or
Fahrenheit.
Fahrenheit
Operation mode
Celsius Fahrenheit
Temperature
(°C)
Analog input
value
Temperature
(°F)
Analog input
value
Thermocouple
Type K -200 to 1,300 -2000 to 13,000 -328 to 2,372 -3280 to 23,720
Type J -200 to 1,000 -2000 to 10,000 -328 to 1,832 -3280 to 18,320
Type R 0 to 1,760 0 to 17,600 32 to 3,200 320 to 32,000
Type S 0 to 1,760 0 to 17,600 32 to 3,200 320 to 32,000
Type B 0 to 1,820 0 to 18,200 32 to 3,308 320 to 33,080
Type E -200 to 800 -2000 to 8,000 -328 to 1,472 -3280 to 14,720
Type T -200 to 400 -2000 to 4,000 -328 to 752 -3280 to 7,520
Type N -200 to 1,300 -2000 to 13,000 -328 to 2,372 -3280 to 23,720
Type C 0 to 2,315 0 to 23,150 32 to 4,199 320 to 41,990
Resistance
thermometer
(RTD)
Pt100 -200 to 850 -2000 to 8,500 -328 to 1,562 -3280 to 15,620
Pt1000 -200 to 600 -2000 to 6,000 -328 to 1,112 -3280 to 11,120
Ni100 -60 to 180 -600 to 1,800 -76 to 356 -760 to 3,560
Ni1000 -60 to 180 -600 to 1,800 -76 to 356 -760 to 3,560
Analog input terminal/analog output terminal AI2/AQ2 AI3/AQ3 AI4/AQ4 AI5/AQ5
Analog value D8176 D8177 D8186 D8187
Analog status D8178 D8179 D8188 D8189
• The value of special data registers for channels that are not used is undefined.
• If the filter is enabled on an analog input, the value after being filtered is stored in the special data
register.
• The analog value and analog status are updated in the scan end processing. The special data register
values are updated regardless of whether the Touch is stopped or running.
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