Delta Electronics VFD-M manual Rev

Chapter 4 Parameters

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		Note: operating time for each step is 10 times
			the settings of Pr.81 to Pr.87.
60Hz	Pr.20		Pr.17=10 Hz	Pr.42=16	Pr.81=1.0
			Pr.18=20 Hz	Pr.45=09	Pr.82=1.2
		Pr.21	Pr.19=40 Hz	Pr.46=10	Pr.83=1.5
50Hz			Pr.20=60 Hz	* Pr.78=04	Pr.84=1.5
	Pr.19		Pr.21=50 Hz	* Pr.79=34	Pr.85=0.8
40Hz			Pr.22=30 Hz		Pr.86=1.7
			Pr.23=15 Hz		Pr.87=1.7

FWD

15Hz

Pr.23

Pr.17

Pr.17

10Hz

0Hz

Pr.82

t

Pr.86

t

Time

Pr.81

t

Pr.83

t

Pr.84

t

t

Pr.87

t

Pr.81

REV

Pr.85

20Hz

Pr.18

30Hz

Pr.22

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		Note: operating time for each step is 10 times
			the settings of Pr.81 to Pr.87.
60Hz	Pr.20		Pr.17=10 Hz	Pr.42=16	Pr.81=1.0
			Pr.18=20 Hz	Pr.45=09	Pr.82=1.2
		Pr.21	Pr.19=40 Hz	Pr.46=10	Pr.83=1.5
50Hz			Pr.20=60 Hz	* Pr.78=01	Pr.84=1.5
	Pr.19		Pr.21=50 Hz	* Pr.79=34	Pr.85=0.8
40Hz			Pr.22=30 Hz		Pr.86=1.7
			Pr.23=15 Hz		Pr.87=1.7

FWD							Pr.87
15Hz	Pr.17	Pr.82
							Pr.23
10Hz
								Time
0Hz
REV	Pr.81			Pr.84	Pr.85	Pr.86
20Hz		Pr.18
30Hz			Pr.83
						Pr.22

4-56 Revision May 2008, ME14, SW V3.04