Delta Electronics VFD-M manual Example 1 Pr.78 = 01 Execute one cycle through the PLC program

Chapter 4 Parameters

Example 1 (Pr.78 =01): Execute one cycle of the PLC program. Its relative parameter settings are:

1Pr.17 to Pr.23: 1st to 7th step speed (sets the frequency for each step speed)

2Pr.38 to Pr.42: Multi-Function Input Terminals (program one multi-function terminal for PLC auto-operation (16)).

3Pr.45 to Pr.46: Multi-Function Output Terminals : program a Multi-Function Output Terminal for PLC operation indication (09), one cycle in PLC auto mode (10) or PLC operation fulfillment attainment (11).

4Pr.78: PLC mode.

5Pr.79: Direction of operation for Master Frequency and 1st to 7th step speeds.

6Pr.81 to Pr.87: operation time setting of Master Frequency and 1st to 7th step speeds.

Example 1 (Pr.78 = 01) Execute one cycle through the PLC program:

Frequency						Master freq.=10Hz
									Pr.81=1.0
60Hz				Pr.20		Pr.17=10 Hz		Pr.42=16
						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=00	Pr.85=0.8
40Hz						Pr.22=30 Hz			Pr.86=1.7
						Pr.23=15 Hz			Pr.87=1.7
30Hz						Pr.22
20Hz		Pr.18
								Pr.23
15Hz
	Pr.17
Master 10Hz
Freq.
0Hz	Pr.81	Pr.82	Pr.83	Pr.84	Pr.85	Pr.86	Pr.87

Program operation command

Program operation output indication

Program step complete

Program operation completed

Note: The above diagram shows one complete PLC cycle. To restart the cycle, turn the PLC

Program input off and then back on.

4-54 Revision May 2008, ME14, SW V3.04