Siemens SPS starter kit 6ED1057-3BA00-0AA8 12 Vdc, 24 Vdc 6ED1057-3BA00-0AA8 Scheda Tecnica
Codici prodotto
6ED1057-3BA00-0AA8
Reference material
5.3 Special functions
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Operating Instructions, 06/2014
Operating Instructions, 06/2014
273
5.3.3.7
Pulse Width Modulator (PWM)
Short description
The Pulse Width Modulator (PWM) instruction modulates the analog input value Ax to a
pulsed digital output signal. The pulse width is proportional to the analog value Ax.
Connection
Description
Input En
A positive edge (0 to 1 transition) at input En enables the PWM function block.
Input Ax
Analog signal to be modulated to a pulsed digital output signal.
Parameter
Gain
Range of values: -10.00 to 10.00
Offset
Offset
Range of values: -10,000 to 10,000
PT: Periodic time over which the digital output is modulated
p: Number of decimals
PT: Periodic time over which the digital output is modulated
p: Number of decimals
Possible settings: 0, 1, 2, 3
Output Q
Q is set or reset for the proportion of each time period according to the
proportion of the standardized value Ax to the analog value range.
0BA1- 0BA5:
The PWM function block did not exist prior to 0BA6.
The PWM function block did not exist prior to 0BA6.
Parameter PT
The periodic time PT can be provided by the actual value of another already-programmed
function:
● Analog comparator: Ax - Ay
● Analog threshold trigger: Ax
● Analog amplifier: Ax
● Analog multiplexer: AQ
● Analog ramp: AQ
● Mathematic instruction: AQ
● PI controller: AQ
● Up/Down counter: Cnt
For the 0BA7 and 0BA8 devices, you can additionally use the actual values of the following
● Analog comparator: Ax - Ay
● Analog threshold trigger: Ax
● Analog amplifier: Ax
● Analog multiplexer: AQ
● Analog ramp: AQ
● Mathematic instruction: AQ
● PI controller: AQ
● Up/Down counter: Cnt
For the 0BA7 and 0BA8 devices, you can additionally use the actual values of the following
already-programmed functions: