VBUS.UVFTHRESH

Description

This parameter is the DC bus undervoltage fault threshold. When the measured DC bus voltage falls below the threshold, an undervoltage fault is thrown for each enabled axis.

Examples

Usage

The drive configures the minimum, maximum, and default values for this parameter based on power electronics ratings.

When an axis is enabled, and the measured DC bus voltage VBUS.VALUE is less than VBUS.UVFTHRESH, the drive throws Fault 2007: Bus under voltage.

When an axis is disabled and VBUS.VALUE is less than VBUS.UVTHRESH, the drive prevents the axis from enabling.

Code

The following example demonstrates the DC bus undervoltage fault check when Axis 1 is enabled and Axis 2 is disabled. The fault is reported on Axis 1 only.

--> VBUS.UVFTHRESH 100
--> VBUS.UVFTHRESH
100 [Vdc]
--> VBUS.VALUE
162.297 [Vdc]
--> AXIS1.EN
--> AXIS1.ACTIVE
1
--> AXIS2.ACTIVE
0



--> VBUS.VALUE
96.895 [Vdc]
--> AXIS1.ACTIVE
0
--> DRV.FAULTS
1-2007: Bus under voltage.

Context

For more information on DC bus voltage protection, refer to Power View and Regeneration.

Versions

Action	Version	Notes
Implemented	02-00-00-000

General Information

Type	Read/Write
Units	Vdc
Range	Dependent on drive model
Default Value	Dependent on drive model
Data Type	Integer
See Also	VBUS.VALUE, VBUS.UVWTHRESH
Stored in Non Volatile Memory	Yes

Variants Supported

All variants are supported.

Fieldbus Information

Fieldbus A Fieldbus is an industrial network system for real-time distributed control (e.g. CAN or Profibus). It is a way of connecting instruments in a plant design	Parameter	Index	Sub-Index	Data Type	Float Scale	Units	Access	PDO PDO is a type of protocol frame used in some fieldbuses. A PDO contains one or more object dictionary entries, which define the application data transferred between devices. Mappable
EtherCAT ***EtherCAT is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT was to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs COE and CANopen	VBUS.UVFTHRESH	0x300A	0x2	UINT	-	-	RW	False