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Programming wiring
MN05013005E
252
– IA04: terminal I12
• Analog output QA01
• Actual value
…
QV> of another function block
Displaying the parameter set in the PARAMETERS menu
• + Access enabled
• – Access disabled
Contacts
PW01E1 to PW02E1, the minimum on duration or the
minimum off duration was undershot.
Coils
PW01EN to PW02EN, enable coil.
Memory requirement of the function block
The pulse width modulation function block requires 48 bytes
of memory plus 4 bytes per constant on the function block
input.
Function of the pulse width modulation function block
The manipulated variable at function block input >SV is
converted to a pulse string with a constant period duration.
The pulse width is proportional to the manipulated variable
>SV. The period duration and the minimum on duration can be
selected as required within the specified limits.
The function block causes a direct output of the pulse to the
corresponding output. The output image of the circuit diagram
is always updated.
J
The pulse width modulation function block must be enabled
so that it can work. Coil PW..EN is active. If coil PW..EN is
not active, the entire function block is deactivated and reset.
The output value is set to zero.