BECKHOFF KL3064 - Manual (Page 7)

Description of functions
KL3064 7
Description of functions
The analog input terminal KL3064 processes signals within the range from
0 to +10V with a resolution of 12 bits (4095 increments). The inputs of the
KL3064 consist of single ended inputs with a common earth potential.
Output format
of process data In the default setting, process data is represented in the twos complement
(integer -1 corresponds to 0xFFFF). By way of the feature register, other
modes of representation can be selected (eg.signed amount representa-
tion, Siemens output format).
Measured value Decimal output Hexadecimal output
0V 0 0x0000
5V 16383 0x3FFF
10V 32767 0x7FFF
LED display
The four RUN LEDs indicate the operating state of the affiliated terminal
channel.
RUN LED:
On – normal opeation
Off – a watchdog-timer overflow has occurred. The green LEDs go off if no
process data is transferred by the bus coupler for 100 ms.
Process data The process data that is transferred to the bus coupler is calculated on the
basis of the following equations:
X_adc: AD convertor output values
Y_aus :
Process data to the PLC
B_a,A_a : Manufacturer gain und offset adjustment (R17,R18)
B_h,A_h : Manufacturer scaling (R19,R20)
B_w,A_w : User scaling (R33,R34)
a) neither user nor manufacturer scaling active:
Y_a = (B_a+X_adc)* A_a
(1.0)
Y_aus =Y_a
b) Manufacturer scaling active: (default)
Y_1 =B_h + A_h * Y_a (1.1)
Y_aus= Y_1
c) User scaling active:
Y_2 =B_w + A_w * Y_a
(1.2)
Y_aus= Y_2
d) Manufacturer and user scaling active:
Y_1 = B_h + A_h * Y_a
(1.3)
Y_2 =B_w + A_w * Y_1 (1.4)
Y_aus = Y_2
The straight-line equations are activated by means of R32.