Agrowtek GrowControl SXC Інструкція з експлуатації - Сторінка 6
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Друкувати сторінкуSupported Commands
0x03 Read Multiple Registers
0x06 Write Single Register
0x10 Write Multiple Register
Register Types
All registers are 16 bits wide with addresses using the standard MODICON protocol. Floating point values
use the standard IEEE 32-bit format occupying two contiguous 16 bit registers. ASCII values are stored with
two characters (bytes) per register in hexadecimal format.
Sensor Value Registers
Sensor values are available in integer or floating point formats depending on the register requested (see
map.)
Sensor #
Type
1
Temperature
2
Humidity
3
Light
4
CO2
For example: an integer temperature value of 2417 is equal to a temperature reading of 24.17°C.
Calibration Registers
Calibration registers are 16-bit signed integers for the purpose of calibrating the sensor values or analog out-
put channels. Calibration may be achieved by writing the desired calibrated value to the associated register.
Writing to the calibration registers automatically invokes the calibration routine for that register.
Offset Calibration
Offset, or zero calibration, is an arithmatic positive or negative correction to the sensor reading and is the
only type of sensor calibration available on climate/environmental sensors.
To perform a sensor offset calibration, simply write the corrected sensor value to the offset calibration reg-
siter (taking into account the integer scale as shown above.)
For example: to set the temperature to a calibrated value of 25°C, write the value "2500. "
Analog Calibration
Analog output calibration sends a positive or negative offset to the respective output channel's digital to
analog converter (DAC.) The DAC has a resolution of 0.005mA/bit.
±1 calibration bit = ±0.005mA adjustment
For example: to shift the analog output up by 0.1mA, set the analog offest value to +20. ( 0.1 / 0.005 = 20)
6
Integer Scale
Range
x100
-2000 - 6000 (-20 - 60°C)
x10
0 - 1000 (0 - 100%)
x1
0 - 1000 W/m2
x1
0 - 2000 ppm
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