Motor Overload Protection - Omron VARISPEED F7 User Manual

Changing Overtorque and Undertorque Detection Levels Using an Analog Input
If parameter H3-09 (Analog Input Terminal A2 Function Selection) is set to 7 (overtorque/undertorque detec-
tion level), the overtorque/undertorque detection level can be changed using the analog input A2 (refer to
6.54).
Only the overtorque/undertorque detection level 1 can be changed using the analog input. Overtorque/under-
torque detection level 2 cannot be changed by an analog input signal.
Fig 6.54 Overtorque/Undertorque Detection Level Using an Analog Input

Motor Overload Protection

The motor can be protected from overload using the built-in electronic thermal overload relay function.
Related Parameters
Parameter
No.
E2-01 Motor rated current
E4-01 Motor 2 rated current
L1-01 Motor protection selection
L1-02 Motor protection time constant
* 1. The factory setting depends on the Inverter capacity (the value shown is for a 200 V Class inverter with 0.4kW)
Multi-Function Outputs (H2-01 to H2-03)
Set
Value
During motor overload (OL1, including OH3) pre-alarm (ON: 90% or more of the detection
1F
level)
Setting Motor Rated Current (E2-01 and E4-01)
Set the rated current value on the motor nameplate in parameters E2-01 (for motor 1) and E4-01 (for motor 2).
This set value is the base current for the internal thermal overload calculation.
Detection level
(4 mA)
Factory
Name
Setting
1.0 min
Function
Multi-function analog input
terminal A2 input level
Control Methods
Change
during
V/f with
Opera-
V/f
PG
tion
1.90 A
No Q Q
* 1
1.90 A
No A A
*1
1 No Q Q
No A A
Control Methods
V/f
V/f with
PG
Yes Yes
Fig
Open Closed
Loop Loop
6
Vector Vector
Q Q
A A
Q Q
A A
Open Closed
Loop Loop
Vector Vector
Yes Yes
51
6-