Festo Контроллеры двигателя SFC-LAC - Manual (Page 125)

5. Commissioning
5−43
Festo GDCP−SFC−LACI−IO−EN en 0812NH
5.5.5 Using the local digital outputs
Purpose The outputs can be used for the following:
ć Displaying an internal logical status of the SFC−LACI,
(e.Ăg. occurrence of a fault)
ć A display of certain values not being reached
(e.Ăg. position values)
ć Controlling a brake/clamping unit (see 5.5.6)
ć Operating a fan, DC motor or similar
Switching logic Positive switching logic: when the output is set (switching
state true, logic 1"), the output is set to 24ĂV. If the output
is not set, to 0ĂV (or in Out2 with PWM, to high impedance).
Negative switching logic: If the output is set, the output is set
to 0ĂV (or in Out2 with PWM, to high impedance). If the output
is not set: to 24ĂV.
PWM (only Out 2) With pulse−width modulation (PWM), a pulsed signal is
output. When using as a brake output, a continuous signal
is initially output for 100 ms when the output is set
(CI 6510/1Ah).
PWM value The PWM value is the duty cycle during a period of time
(frequency: approx. 20 kHz), in the following diagram, 33 %:
24 V
33 %
100 %
100 ms
1
2
1 only when using as a brake output 2 high impedance
Fig. 5/7: PWM value