Parameter Description VD520 Series Inverter User Manual
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Multi-reference in addition to as a multistage speed function, also can be a given source of PID, or as
a voltage source of V/F separation control etc., to meet the demand of the need of switching between
different given values.
FC-16
Simple PLC Run Mode
0: Stop when single run end
1: Keep the final value when single run
end
2: Always circulation
0
○
Simple PLC has two functions: as frequency source or as a voltage source of V/F separation.
The following figure is a simple PLC as the frequency source. When simple PLC as frequency source,
the positive and negative of FC-00~FC-15 to determine the running direction, if the negative value
indicates that the frequency inverter is running in the opposite direction.
Time(t)
DO or relay
output
250ms pulse
output
Running
direction
FC-19
FC-21
FC-23
FC-18 FC-20
FC-01
FC-00
FC-02
FC-14
FC-15
Fig 6-33 Schematic diagram of simple PLC
As a frequency source, PLC has three operation modes, as a V/F separation voltage source does not
have this three ways. Among them:
0: Signal run end stop
After completing a single cycle inverter automatically stop, need operation command given to start
again.
1: Single run end terminal
After completing a single cycle, inverter automatically keep the running frequency and direction of the
last stage.
2: Always circulating
After completion of a cycle, the frequency inverter automatically starts the next cycle, until the stop
command is stopped.
