Omron VARISPEED L7 User Manual

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 Output Current Observation
The inverter can observe the output current and thereby detect e.g a wrong motor contactor sequence or bad
motor connection. There are two observation functions, one for the start and one during run.
Related Parameters
SE2 fault (SE2, Current observation at start)
The current is measured for the time S1-06 + S1-14 (Brake open delay plus SE2 detection time) after the Up/
Down command input. If it is/falls below 25% of the motor no-load current (E2-03) a SE2 fault is output.
S1-06 + S1-14 must be smaller than S1-04 (DC injection at start).
SE3 fault (SE3, Current observation during Run)
When the acceleration is started (DC injection/Zero Speed time S1-04 after the Up/Down command input), the
inverter observes the output current continuously. If it falls below 25% of the motor no-load current (E2-03) a
SE3 fault is output.
 Over Acceleration Detection (“DV6” Fault Detection)
Using this function an over acceleration of the car caused by too high load or wrong settings can be detected.
The function works in Closed Loop Vector for PM motors only (A1-02 = 6). If an over acceleration is
detected, the inverter stops and a “DV6” fault is displayed.
Related Parameters
Adjusting the Over Acceleration Detection
Over acceleration is detected when the acceleration of the car exceeds the value set in S3-16 for longer than
the time set in S3-17. The setting of parameter S3-18 decides the over acceleration is always activate if the
power supply is on (S3-16 = 0) or only during run (S3-16 = 1).
Setting parameter S3-16 to 0.0 m/s² disables the over acceleration detection.
Parameter
No.
Name
Factory
Setting
Change
during
Operation
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
S1-14 SE2 detection time 200 ms No A A A -
S1-15 SE3 detection time 200 ms No A A A -
Parameter
No.
Name
Factory
Setting
Change
during
Operation
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
S3-16 Over acceleration detection level 1.5 m/s² No - - - A
S3-17 Over acceleration time constant 0.05 sec. No - - - A
S3-18 Over acceleration detection method 0 No - - - A
IMPORTAN
T
It is imperative to set up the parameters S3-13, S3-14 and S3-15 (traction sheave diameter, roping and
gear ratio) in order to make this function working properly!

Omron VARISPEED L7 Specifications

General

Brand	Omron
Model	VARISPEED L7
Category	Inverter
Language	English