Momentary Overload - WEG CFW-11 Applications Manual

Parameters Description
5 – The speed reference 2, programmed in P1032, is selected through the digital input DI4. The load is then
accelerated to that speed reference 2 selected through the digital input DI4. Note that the motor current
increases, but momentary overload is not detected while forward the load.
6 – The motor reaches the speed reference 2 and keeps forward the load at that speed.
7 –The motor deceleration begins. The brake remains release.
8 – The motor frequency becomes less than or equal to the threshold adjusted in P1048, and the command to
close the mechanical brake is executed through the removal of the digital output DO3 command.
9 – The motor is decelerated down to 0 rpm and remains magnetized (If within the period programmed in
P1027 a new forward or reverse command does not occur, the motor will be demagnetized). The load remains
stopped, being held by the mechanical brake.

3.13 MOMENTARY OVERLOAD

This parameter group allows the user to adjust the conditions for the crane horizontal motion momentary
overload detection at the load forward or load reverse stage.
Momentary Overload is an abnormal condition detected during the crane horizontal motion operation where,
during the command to load forward or load reverse, it appears that a further effort to get the load moving and
this can be caused by some object that is in route or a misalignment of the mechanical equipment.
P1052 – Momentary Overload Current Threshold
Adjustable 0.0 to 3000.0 A
Range:
Proprieties:
Access groups via HMI:
Description:
This parameter defines the momentary overload current threshold when, during the command to load forward
or load reverse, the momentary overload condition can be detected. In other words, if the actual motor current
is greater than or equal to the adjusted threshold, then the momentary overload condition will be detected at the
load forward or load reverse.
NOTE!
With the momentary overload detection, only is generate an alarm message "A770: Momentary
Overload".
NOTE!
Setting this parameter in 0.0 disables the alarm.
P1053 – Momentary Overload Detection Delay Time
Adjustable 0.00 to 650.00 s
Range:
Proprieties:
Access groups via HMI:
Description:
This parameter defines a delay time after the load forward or load reverse command has been given, before
initiating the momentary overload monitoring according to the current threshold defined in P1050.
01 PARAMETER GROUPS
∟ 50 SoftPLC
01 PARAMETER GROUPS
∟ 50 SoftPLC
Factory Setting:
.....
Factory Setting:
.....
Crane Horizontal Motion | 45
50.0 A
1.00 s