KL3464 and KL3468 - Basic Function Principles
The KL3464 and KL3468 analog input terminals process signals in the range from -0 V to +10 V with a resolution of 12 bits (4095 steps). The inputs are single-ended inputs with a common ground potential.
Process data output format
In the delivery state the process data are shown in two's complement form ( -1integer corresponds to 0xFFFF). Other presentation types can be selected via the feature register R32 (e.g. signed amount representation, Siemens output format).
Measured value | Input data | |
|---|---|---|
decimal | hexadecimal | |
0 V | 0 | 0x0000 |
+5 V | 16383 | 0x3FFF |
+10 V | 32767 | 0x7FFF |
Process data equations
The process data that are transferred to the Bus Coupler are calculated using the following equations:
Neither user nor manufacturer scaling is active
Ya = (Ba + XADC) x Aa | (1.0) |
Yout = Ya |
|
Manufacturer scaling active (default setting)
Y1 = Bh + Ah x Ya | (1.1) |
Yout = Y1 |
|
User scaling active
Y2 = Bw + Aw x Ya | (1.2) |
Yout = Y2 |
|
Manufacturer and user scaling active
Y1 = Bh + Ah x Ya | (1.3) |
Y2 = Bw + Aw x Y1 | (1.4) |
Yout = Y2 |
|
Key
XADC: | Output values of the A/D converter |
|
Yout: | Process data to PLC |
|
Ba , Aa: | Manufacturer gain and offset compensation | |
Bh , Ah: | Manufacturer scaling | |
Bw, Aw: | User scaling |
The equations of the straight line are enabled via register R32.
Fig.7: Signal processing