5 
VFD-B Series 
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED 
5-33
Example 1 (Pr.05-15 = 1): 
Execute one cycle of the PLC program. Its relative parameter 
settings are: 
Pr.05-00 to 05-14:  1
st
 to 15
th
 step speed (sets the frequency of each step speed)   
Pr.04-04 to 04-09:  Multi-Function Input Terminals (set one multi-function terminal as 
14 - PLC auto-operation). 
Pr.03-00 to 03-03:  Multi-Function Output Terminals (set a Multi-Function Terminal as 
10-PLC running indication, 11-PLC step completed or 12-PLC 
program completed). 
Pr.05-16:  Direction of operation for the 1
st
 to 15
th
 step speed. 
Pr.05-17 to 05-31:  Operation time setting of the 1
st
 to 15
th
 step speed. 
Program operation
command
Program operation
indication
Step operation
indication
Program operation
fulfillment indication
 
Note: The above diagram shows one complete PLC cycle. To restart the cycle, turn the PLC 
program off and on again. 
 
Example 2 (Pr.05-15 = 2): Continuously executes program cycles: 
The diagram above shows the PLC program stepping through each speed. Set Pr.05-15 to 2 
continuously executes the program. To stop the PLC program, one must either pause the 
program or turn it off. (Refer to Pr.04-04 to 04-09 values 14 and 15).