Moeller DF5 series - Frequency Display FM; Analog Frequency Display

Programming the control
signal terminals
09/01 AWB8230-1412GB
52
Frequency display FM
The FM terminal provides the output frequency or the motor
current as a frequency signal.
The selection between the frequency display and display of the
motor current is made under PNU C23.
Analog frequency display
The signal output (PNU C23 = 00 or 01) is a square-wave, with a
constant period of oscillation. Its pulse width is proportional to the
current frequency value (0 to 10 V correspond to 0 Hz to the end
frequency).
Signal compensation takes place in PNU b81. The signal accuracy
after compensation is g5%.
If for example, a higher level of smoothing of the FM signal is
required for a motor current display, an external low-pass filter
circuit is required. The accuracy is approx. g20 %.
PNU Name Adjustable in
RUN mode
Value Function WE
C23 Display via FM
output
– 00 Indication of the output frequency (analog 0 to 10 V H signal) 00
01 Indication of motor current (analog 0 to 10 V H signal; 100 % rated
current corresponds to 5 V H)
02 Display of the output frequency (digital impulse signal)
Analog frequency meter
0 to 10 V
1mA
t/T = variable
T = 4 ms (constant)
Figure 43: Connection of an analog frequency meter
0 – 10 V
1 mA
FML
–
+
10 V
t
T
Figure 44: Example for a low-pass circuit
33 kO
82 kO
1 mF
+
–
+
FML
0 – 10 V
1 mA
PNU Name Adjustable in
RUN mode
Value Function WE
b81 Adjustment
value for
analog signal
on FM terminal
j 0 to 255 The analog signal issued on the FM terminal (frequency actual value or
output current) can be adjusted here. The impulse signal (digital
frequency actual value) cannot be compensated.
80