Bedford B550-2001, Installation And Quick Start Manual

Page: 64 / 116

5-38
Example 4 (Pr.78 = 04) Continuously executes program cycles step by step:
In this explanation, the PLC program runs continuously step by step. Also shown are
examples of steps in the reserve direction.
Frequency
60Hz
50Hz
40Hz
30Hz
20Hz
15Hz
10Hz
0Hz
Pr.81
Pr.83
Pr.84
Pr.85
Pr.87
Pr.17
Pr.18
Pr.19
Pr.20
Pr.21
Pr.22
Pr.23
Pr.17=10 Hz
Pr.18=20 Hz
Pr.19=40 Hz
Pr.20=60 Hz
Pr.21=50 Hz
Pr.22=30 Hz
Pr.23=15 Hz
Pr.42=16
Pr.45=09
Pr.46=10
Pr.78=04
Pr.79=34
Pr.81=1.0
Pr.82=1.2
Pr.83=1.5
Pr.84=1.5
Pr.85=0.8
Pr.86=1.7
Pr.87=1.7
*
Note: operating time for each step is 10 times
the settings of Pr.81 to Pr.87.
t
Pr.82 t
t
t t
Pr.86
t
t
*
Pr.17
Time
Pr.81
FWD
REV
Example 5 (Pr.78 = 01) Execute one cycle through the PLC program:
In this example, the PLC program runs continuously. It should be noted that the time interval
for each step may be shorter than expected due to the time required for acceleration and
deceleration.
Frequency
60Hz
50Hz
40Hz
30Hz
20Hz
15Hz
10Hz
0Hz
Pr.81
Pr.83
Pr.84
Pr.85
Pr.87
Pr.17
Pr.18
Pr.19
Pr.20
Pr.21
Pr.22
Pr.23
Pr.17=10 Hz
Pr.18=20 Hz
Pr.19=40 Hz
Pr.20=60 Hz
Pr.21=50 Hz
Pr.22=30 Hz
Pr.23=15 Hz
Pr.42=16
Pr.45=09
Pr.46=10
Pr.78=01
Pr.79=34
Pr.81=1.0
Pr.82=1.2
Pr.83=1.5
Pr.84=1.5
Pr.85=0.8
Pr.86=1.7
Pr.87=1.7
*
Note: operating time for each step is 10 times
the settings of Pr.81 to Pr.87.
Pr.82
Pr.86
*
Time
FWD
REV
B550
Series
sensorless vector frequency drive