Functioning IP/IE3102

The analog input module handle signals from -10 V up to 10 V with a resolution of 16 bits. The filter constants and the associated conversion times can be adjusted over a wide range.

Process data (hex)	Process data (decimal)	Measured value
0x8000	-32768	-10 V
0xC001	-16383	-5 V
0x0000	0	0 V
0x3FFF	16383	5 V
0x7FFF	32767	10 V

Representation corresponds to the integer number format (INT). The default setting is for the process data to be entered in twos complement (-1 corresponds to 0xFFFF).

Process data

The process data written by the controller is output as follows:
x_adc = output value from the A/D converter
y_aus = process data to the PLC controller
B_a, A_a = manufacturer scaling (registers 17, 18)
B_h, A_h = manufacturer scaling (registers 19, 20)
B_w, A_w = user scaling (registers 33, 34)
Y_dac = output value to the D/A converter

Neither user nor manufacturer scaling are active

Y_a = (B_a + x_adc)*A_a
Y_aus = Y_a

Manufacturer scaling active (default)

Y_1 = B_h + A_h * Y_a
Y_aus = Y_1

User scaling active

Y_2 = B_w + A_w * Y_a
Y_aus = Y_2

Manufacturer and user scaling active

Y_1 = B_h + A_h *Y_a
Y_2 = B_w + A_w * Y_1
Y-aus = Y_2

The linear equations are activated via register 32.