Delta Electronics VFD-M Series, User Manual

Page: 89 / 173

Chapter 4 Parameters
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4-54 Revision May 2008, ME14, SW V3.04
Example 1 (Pr.78 =01): Execute one cycle of the PLC program. Its relative parameter settings are:
1 Pr.17 to Pr.23: 1st to 7th step speed (sets the frequency for each step speed)
2 Pr.38 to Pr.42: Multi-Function Input Terminals (program one multi-function terminal for PLC
auto-operation (16)).
3 Pr.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).
4 Pr.78: PLC mode.
5 Pr.79: Direction of operation for Master Frequency and 1st to 7th step speeds.
6 Pr.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
60Hz
50Hz
40Hz
30Hz
20Hz
15Hz
10Hz
0Hz
Pr.81
Pr.82 Pr.83 Pr.84
Pr.85
Pr.86 Pr.87
Pr.17
Pr.18
Pr.19
Pr.20
Pr.21
Pr.22
Pr.23
Master
Freq.
Program operation
command
Program operation
output indication
Program step
complete
Program operation
completed
Master freq.=10Hz
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=00
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: The above diagram shows one complete PLC cycle. To restart the cycle, turn the PLC
Program input off and then back on.