Burkert Type 8619 - Manual (Page 79)

77
Adjustmentandcommissioning
configuring in "pWm" operating
This mode is used to control an "on/off" actuator.
T1 T1 T1 T1
T2 T2 T2 t
not inverted
output
HIGH
LOW
T1
T2
T1 T1
T2 T2 t
inverted
output
HIGH
LOW
T2 = period, constant
T1 varies
Figure 66 : "PWM" operating
PV: Choose the process input associated with the output selected.
LOW: Choose the value of the process input ("PV") corresponding to 0% PWM.
HIGH: Choose the value of the process input ("PV") corresponding to 100 % PWM.
INVERT: Invert the output or not.
PERIOD: Choose the value of period T2 in seconds.
MIN ON TIME: Choose the minimum value of T1 in seconds.
configuring in "pfm" operating
This mode is used to control a dosing pump, for example.
not inverted output
T2
T1
T2 T2 T2 T2
t
HIGH
LOW
T2 T2 T2 T2 T2
T1
t
inverted output
HIGH
LOW
T1 = period, constant
T2 varies
Figure 67 : "PFM" operating
PV: Choose the process input associated with the output selected.
LOW: Choose the value of the process input corresponding to the min. frequency.
HIGH: Choose the value of the process input corresponding to the max. frequency defined in "MAX. FREQ."
below.
Type 8619
english