Fuji Electric FRENIC-Multi Series - Description of the Control; Input Pulse Command Polarity; Block Diagram

5-3
5.5 Description of the Control
5.5.1 Input pulse command polarity
In the B phase pulse input system shown in Figure 5.2, the A phase voltage determines the polarity
of commands. In the run forward/reverse pulse input system shown in Figure 5.3, the presence of A
or B phase input determines the polarity of commands.
The combination of the command pulse input and FWD/REV command determines the actual motor
rotational direction. Table 5.5 lists the relationship between the polarity of the pulse input, FWD/REV
command and motor rotational direction.
+ -
B phase input
A phase input
Polarity
Figure 5.2 Polarity of the B Phase Pulse Input
+ -
B phase input
A phase input
Polarity
Figure 5.3 Polarity of the Run Forward/Reverse Pulse Input
Table 5.5 Relationship between Polarity of the Pulse Input, FWD/REV Command
and Motor Rotational Direction
Command polarity determined by
pulse input
Run command Motor rotational direction
+
FWD
Forward
+
REV
Reverse
-
FWD
Reverse
-
REV
Forward
5.5.2 Block diagram
Figure 5.4 shows a block diagram of the pulse train input command system.
FWD
REV
Pulse count
factoring
o06
Select frequency
command 2/1
Hz2/Hz1
0
1
Frequency
command 1
F01
12
[12]
UP/DOWN keys on keypad
1
Frequency
command 2
C30
0
UP/DOWN keys on keypad
[12]
2
[C1]
Frequency
measuring
o07
o08
Input
mode
o01
[XA]
[XB]
Rotation
direction
processing
Drive frequency
command
Figure 5.4 Block Diagram of the Pulse Train Input System