Rockwell Automation PowerFlex 700S, Руководство пользователя, Страница: 268 / 318

C-6 Application Notes
PowerFlex 700S Phase II AC Drive User Manual - Publication 20D-UM006G-EN-P – July 2008
Figure C.1 Motor Overload Curve When Par 338 [Mtr I2T Spd Min] Is Less Than 1.0
Figure C.2 Motor Overload Curve When Par 338 [Mtr I2T Spd Min] Is Equal To 1.0
Motor Overload Memory Retention Per 2005 NEC
The PowerFlex 700S drive with Phase II control (firmware 3.01 and higher)
has the ability to retain the motor overload count at power down per the
2005 NEC motor overtemperature requirement.
•
To enable motor overload memory retention, set bit 20 “Motor OL Ret”
of parameter 153 [Control Options] to “1”.
•
To disable motor overload memory retention, set bit 20 “Motor OL Ret”
of parameter 153 [Control Options] to “0”.
The motor overload count value can be viewed in parameter 341 [Mtr I2T
Count].
P 33 6 [Motor OL F a ctor]
C
u
rrent
P 33 7 [Mtr I2T C u rr Min]
S peed
P 338 [Mtr I2T S pd Min] B as e S peed (1.0)
When motor current exceeds the value of the curve,
the motor overload output integrates. A motor
overload exception event occurs when the value of
the motor overload output reaches 1.0. The value of
the motor overload output is visible in Par 330 [Fault
TP Data] when the value of Par 329 [Fault TP Sel]
equals 13.
P 33 6 [Motor OL F a ctor]
C
u
rrent
S peed
When the value of Par 338 [Mtr I2T Spd Min] equals
1.0, the curve is flat - at the value of rated motor
current times the value of Par 336 [Motor OL Factor].
If the motor current exceeds the value of the curve,
the value of the motor overload output integrates.
The value of the motor overload output is visible in
Par 330 [Fault TP Data] when the value of Par 329
[Fault TP Sel] equals 13.