E_ReferenceType

This enumeration represents the reference travel type. To check which reference types are available on a specific device or reference mode, open the configuration menu Reference travel of the logical device and activate the "Reference travel type" choice box. The configuration shows the available reference types for the device and the reference mode.

Name

Value

Description

Deactivated

0

Reference travel is deactivated. Referencing is not possible.

ZeroPulseNegativeDirection

1

Referencing is performed to the zero pulse (reference pulse of the encoder). The first search direction is negative. The reference point is the first zero pulse. A reference cam is not required.

ReferenceCamNegativeEnd

2

Referencing is performed to the negative end of the reference cam. The first search direction is negative.

ReferenceCamPositiveEnd

3

Referencing is performed to the positive end of the reference cam. The first search direction is positive.

LimitSwitchPositive

4

The reference point is at the end of the left limit switch.

LimitSwitchNegative

5

The reference point is at the end of the right limit switch.

ReferenceCamFlushLimitSwitchPositive

7

Referencing is performed to a reference cam. The reference cam must start just before or in line with the positive hardware limit switch and must project into the limit switch. Reference travel starts at search speed in positive direction. When the negative end of the reference cam is reached, the drive turns and leaves the reference cam again at retraction speed. If no reference cam is found in the positive direction of rotation, an error is triggered at the positive limit switch. If the positive limit switch is hit during deceleration on the reference cam, this is ignored and referencing is continued.

ReferenceCamFlushLimitSwitchNegative

8

Referencing is performed to a reference cam. The reference cam must start just before or in line with the negative hardware limit switch and must project into the limit switch. Reference travel starts at search speed in negative direction. When the positive end of the reference cam is reached, the drive turns and leaves the reference cam again at retraction speed. If no reference cam is found in the negative direction of rotation, an error is triggered at the negative limit switch. If the negative limit switch is hit during deceleration on the reference cam, this is ignored and referencing is continued.

ReferencingWithoutReferenceTravel

9

The reference point is set at the current position of the drive. The drive does not perform any movement.

FixedStopPositive

10

Referencing is performed to a fixed stop. The system must be designed so that the fixed stop can withstand the load from the respective speed without damage. The search direction is positive. The reference point is the positive fixed stop. Because any hardware limit switches connected to the inverter are ignored in this reference travel configuration, there is a risk of jamming and crushing.

FixedStopNegative

11

Referencing is performed to a fixed stop. The system must be designed so that the fixed stop can withstand the load from the respective speed without damage. The search direction is negative. The reference point is the negative fixed stop. Because any hardware limit switches connected to the inverter are ignored in this reference travel configuration, there is a risk of jamming and crushing.

AbsolutePositionOfEncoder

12

Only the reference bit is set and the current position of the encoder is adopted as the actual position. The reference travel type is only useful for encoders that have a direct reference to the system, e.g. linear encoders. The reference offset parameter is not used.

UseDriveSettings

128

Setting for when a reference type of a particular device is not listed in this list. Only used for drive-based reference travel. With this setting, the software module does not parameterize the reference travel of the drives. The reference travel of the drives can be configured manually using the device-specific engineering tool.