Machine Protection
6-
33
Multi-Function Outputs (H2-01 to H2-08)
Setting Motor Rated Current
Set the rated current value on the motor nameplate in constants E2-01. This set value is the electronic thermal
base current.
Setting Motor Protection Operation Time
Set the motor overload detection start level for L1-06, the motor overload detection level for L1-07, and the
motor protection operation time as for motor overload detection level for L1-02. In these cases, the motor
rated current is set to 100%.
The factory setting is resistance to 150% for 60 seconds.
If the output current exceeds the motor overload detection start level, the electronic thermal protection will
activate.
The following diagram shows an example of the characteristics of the electronic thermal protection operation
time (L1-02=60 seconds, L1-06=110%, L1-07=150%).
Fig 6.14 Motor Protection Operation Time
Setting Precautions
•
To detect overloads promptly, keep the set value in L1-02 or L1-07 at a low setting.
•
If L1-06 (motor overload detection start level) is set to be equal or higher than L1-07 (motor overload
detection level), an OPE11 (constant setting error) operation error may occur. Set L1-06 to be lower than
L1-07.
Setting
Value
Function
Control Methods
Open-
loop
Vector
Flux
Vector
1F
Motor overload (OL1)
Yes
Yes
Operating time (min.)
Motor current (%)
E2-01 = 100%
100
60
10
0
100
110
150
