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Programming wiring
MN05013005E
250
Function of the PUT function block
Figure 128: Signal diagram of PUT function block
1: trigger coil
2: trigger coil contact feedback
3: send
Pulse width modulation
EZD provides 2 pulse width modulation function blocks PW01
and PW02. The function blocks are connected directly to the
outputs.
They are assigned as follows:
PW01
J
Q1
PW02
J
Q2
The pulse width modulation function block is primarily used for
outputting the manipulated variable of a PID controller. The
maximum frequency is 200 kHz. This corresponds to a period
duration of 5 ms. The maximum period duration is 65.5 s.
Wiring a pulse width modulation function block
A pulse width modulation function block is integrated in the
circuit diagram as a contact or coil.
1
2
3
J
When using the pulse width modulation function block with
a minimum on time of less than 1 s only use devices with
transistor outputs.
J
To prevent unpredictable switching states, use each coil of
a relay once only in the circuit diagram.
