9300 Servo PLC
System blocks
2.12
MCTRL_MotorControl
2-58
L
ServoPLC EN 2.0
2.12.17.4
OU - overvoltage monitoring
This function monitors the DC-bus and protects the controller.
No. Monitoring function
Display System variable
TRIP
Message Warning
Off
020 Overvoltage
OU
MCTRL_bOvervoltage_b
•
•
Default setting
ü
Setting possible
The monitoring reacts if the DC-bus voltage exceeds a threshold set under C0173 at the terminals
-U
G
and -U
G
and remains active until the value falls below the switch-on threshold.
•
The DC-bus voltage is set under C0173:
Code
LCD
Possible settings
IMPORTANT
o
Lenze
Selection
[C0173] UG limit
1
Adaptation of DC-bus voltage thres-
holds
•
check during commissioning, and
adapt if necessary
•
All drive components in DC-bus
links must have the same
thresholds
0
Mains < 400 V; with or without brake unit
1
Mains = 400 V; with or without brake unit
2
Mains = 460 V; with or without brake unit
3
Mains = 480 V; without brake unit
4
Mains = 480 V; with brake unit
•
The switch-on and switch-off thresholds depending on C0173 can be obtained from the table:
C0173 threshold
Switch-off threshold
Switch-on threshold
0
Mains < 400 V; with or without brake unit
770 V
755 V
1
Mains = 400 V; with or without brake unit
770 V
755 V
2
Mains = 460 V; with or without brake unit
770 V
755 V
3
Mains = 480 V; without brake unit
770 V
755 V
4
Mains = 480 V; with brake unit
800 V
785 V
•
The switch-off threshold determines the voltage level of the DC-bus voltage at which the pulse
inhibit is activated.
Brake torque derating
If the drive is not using a brake system (934X supply module or 935X brake unit), the brake torque
will be automatically derated if the DC-bus voltage reaches the following value:
Threshold for brake torque derating
=
Switch-off threshold
−
OV reduce
•
Set the value “OV reduce” under C0172:
Code
LCD
Possible settings
IMPORTANT
o
Lenze
Selection
[C0172] 0V reduce
10
Threshold to activate the brake torque
reduction before OU fault
0
{10 V}
100
efesotomasyon.com - Lenze
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