Inovance MD800 Series Function Guide

Function Applications
-521-
4.6.6 Load Loss Protection
Set the ten thousands position of F9-51 to enable load loss detection. When the output current of the
AC drive falls below F9-68 (Load loss detection level) for longer than the value of F9-69 (Load loss
detection time), the AC drive performs load loss protection action.
Parameter
No.
Parameter Name
Default Value
Setting Range Parameter Description
F9-51
Fault protection
action 4
51111
-
The fault protection actions are set
through the ones, tens, hundreds,
thousands, and ten thousands
positions of this parameter.
0: Coast to stop
The AC drive coasts to stop.
1: Decelerate to stop
The AC drive decelerates to stop.
4: Alarm
The AC drive continues to run.
5: Canceled
The fault detection is disabled.
F9-68
Load loss
detection level
10.0% 0.0% to 100.0%
When the output current of the AC
drive falls below F9-68 (Load loss
detection level) for longer than the
time set by F9-69 (Load loss detection
time), the AC drive performs load loss
protection action (selected through
F9-49).
F9-69
Load loss
detection time
1.0s 0.1s to 60.0s
4.6.7 Speed Error Protection
The excessive speed error detection function is valid when the SVC mode is selected for the AC drive
(F0-01 = 1).
When the detected motor speed is different from the frequency reference and the difference is larger
than the value of F9-73 (Detection level of speed error) for longer than the time set by F9-74 (Detection
time of speed error), the AC drive reports the excessive speed deviation fault (E42.00) and acts as
selected by F9-50 (Fault protection action selection).
If F9-73 (Detection level of speed error) is set to 0.0% or F9-74 (Detection time of speed error) is set to
0.0s, the excessive speed error detection function is s disabled.
Related Parameters
Parameter No. Parameter Name
Default Value
Setting Range Parameter Description
F9-73
Detection level of excessive
speed deviation
20.0% 0.0% to 50.0%
(maximum frequency)
-
F9-74
Detection time of excessive
speed deviation
5.0s 0.0s to 60.0s

Inovance MD800 Series Specifications

General

Brand	Inovance
Model	MD800 Series
Category	DC Drives
Language	English