Basic function principles
The KL4112 analog output terminal generates signals in the range from 0 to 20 mA. The terminal supplies the output voltage with a resolution of up to 16 bits. The output voltage is output electrically isolated from the terminal bus level.
The LEDs indicate the operating state of the associated terminal channels.
- green Run LED:
- On: Normal operation
- Off: Watchdog timer overflow has occurred. If no process data are transmitted by the Bus Coupler for 100 ms, the green LEDs go out. The output assumes a user-specified voltage (see Feature register).
Process data input format
In the delivery state the process data are shown in two's complement form (integer -1 corresponds to 0xFFFF).
Output value | Process data | |
|---|---|---|
dec | hex | |
0 mA | 0 | 0x0000 |
10 mA | 16383 | 0x3FFF |
20 mA | 32767 | 0x7FFF |
Process data
The process data arriving from the Bus Coupler are output to the process:
Y_0 = B_a + A_a*X | (1.0) | Neither user nor manufacturer scaling is active. |
Y_1 = B_h + A_h * X | (1.1) | Manufacturer scaling active |
Y_2 = B_w + A_w * X | (1.2) | User scaling active |
Y_1 = B_h + A_h * X | (1.3) | Manufacturer and user scaling active |
Key
Name | Name | Register |
|---|---|---|
X | PLC process data | - |
B_a | Hardware compensation offset | |
A_a | Hardware compensation gain | |
B_h | Manufacturer scaling: Offset | |
A_h | Manufacturer scaling: Gain | |
B_w | User scaling: Offset | |
A_w | User scaling: Gain | |
Y_dac | Output value for the D/A converter | - |
The equations of the straight line are enabled via register R32