6-98
•
There are some monitor items that are limited to the 0 to +10 V signal range even when the 0- to
±
10-V
signal level has been selected. Refer to the table of status monitor items in page 3-12 for details.
6-5-8 Protective Functions: L
H
Motor Protection Settings (L1)
Parameter
Display name
Setting
Units
Default
Valid access levels
number
p y
g
range
setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
L1-01
MOL Fault Select 0 or 1
---
1
Basic or Advanced
Note This parameter cannot be changed during operation.
Setting
Function
0
Disabled.
1
Enabled.
•
This setting enables or disables the motor overload protection function.
•
The rated current setting (E2-01) is used as a basis for overload detection.
•
Disable the motor protection function (setting 0) when two or more motors are connected to a single
Inverter. Use another method to provide overload protection separately to each motor, such as con-
necting a thermal relay to the power line of each motor.
•
The motor protection function may not protect a motor when the power supply is turned on and off
frequently, because the thermal value is reset each time that the power is turned off.
•
If the Overload OL1 alarm (1F) is set in one of the multi-function outputs (H2-01 through H2-03), the
output will be turned ON when the electronic thermal value reaches 90% of the overload detection
level.
Parameter
Display name
Setting
Units
Default
Valid access levels
number
p y
g
range
setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
L1-02
MOL Time Const
0.1 to 5.0
Minutes 1.0
Basic or Advanced
Note This parameter cannot be changed during operation.
•
Normally it isn’t necessary to change this setting. (The default setting is a 150%, 1 minute endurance.)
•
This setting specifies the electronic thermal detection time.
•
Set the protection time for a 150% load imposed after hot-starting and continuously operating the
Inverter with a rated current. Set the protection time at rated speed if a general-purpose motor is used.
The rated current of the general-purpose motor will decrease if the frequency drops. Therefore, the
Inverter will automatically shorten the detection time at low frequency.
•
When the motor’s overload endurance level is known, set the hot-start overload resistance level for
the motor, but be sure to allow some margin for safety.
•
Decrease this setting when you want to detect an overload more quickly.
Advanced Operation
Chapter 6
Summary of Contents for SYSDRIVE 3G3FV
Page 1: ...USER S MANUAL High function General purpose Inverter SYSDRIVE 3G3FV Cat No I516 E1 4 ...
Page 16: ...Chapter 1 Introduction 1 1 Function 1 2 Nomenclature 1 3 New Functions 1 ...
Page 33: ...Chapter 2 Installation 2 1 Mounting 2 2 Wiring 2 ...
Page 112: ...Chapter 4 Trial Operation 4 1 Procedure 4 2 Operation Example 4 ...
Page 289: ...Chapter 7 Parameter Lists 7 1 Initialize Mode Parameters 7 2 Program Mode Parameter List 7 ...
Page 366: ...Chapter 9 Specifications 9 1 Inverter Specifications 9 2 Option Specifications 9 ...
Page 395: ...Chapter 10 Appendix 10 1 Notes on Using the Inverter for a Motor 10 ...