Delta VFD040C43A-21 User Manual

Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-10-18
 Incremental operation: Does not memorize position data. The homing positioning function re-
aligns and operates after power off.
 Incremental encoder does not provide multi-turn information; therefore, the incremental
encoder can be only used for incremental operation.
 Absolute operation: Through memorizing multi-turn position, the drive memorizes all the motor
displacement after power off, and re-calculates the mechanical absolute position. The drive
can operate without re-executing homing positioning function.
 The absolute encoder selects whether to use multi-turn data, therefore, you can use the
absolute encoder as incremental encoder and set to “Incremental operation”, or you can use
its memorizing multi-turn data function as “Absolute operation”.
 bit4–7: Coordinate axis mode:
 The motor mechanical structure application is divided into linear motion and rotation motion in
general, which are defined as “Linear axis application” and “Rotation axis application”.
 Linear axis application: Generally for limited progress application, such as screw bar
mechanical structure. The shifting on the linear structure has its operation distance range, and
the motor operation does not exceed the corresponded rotation laps. The mechanical structure
usually configures protection component such as limited switch, or sets the maximum and
minimum setting range (FWD / REV software limits) to the command.
 Rotation axis application: This application has different operating method depending on
whether the mechanical structure has progress limitation. If yes, it usually configures limited
switch or sets the maximum and minimum range to the command, same as the operation for
linear axis application. If the mechanical structure does not have progress limitation, the motor
allows unlimited operation in the same direction. It can still operate even the multi-turn
information overflows, and the position information that provided to the upper controller must
be correct and continuous.
 Rotation axis unlimited progress application also defines the position (Pr.10-61, Pr.10-62) of
mechanical structure’s single-turn relative to the motor. For example: For a cam application, it
defines that when the mechanism rotates one lap, the displacement relative to the motor is
100 laps. The position that the drive feedback to the upper controller is also locked under these
100 laps. Even when the motor rotates for over 100 laps, the coordinate system module still
calculates the displacement as data under 100 laps. For instance, when the motor rotates for
101 laps, its calculated displacement is the same as the displacement that motor rotates for 1
lap on the mechanical structure.
 bit8–11: Encoder overflow treatment:
 The absolute encoder memorizes multi-turn information, but there is still upper limit for the
memorizing capacity. Take Tamagawa for example, the total capacity is 16 bit, when the drive
operates in the same direction and the multi-turn information overflows, the encoder issues an
overflow alert, and the multi-turn information continues to count in the same direction.
 There are three treatment for bit8–11 overflow:
1. bit8–11 = 0: Warn but continue operation:
The drive issues the alert when overflow occurs, but still receives command from the upper
controller and continues operation.

Delta VFD040C43A-21 Specifications

General

Brand	Delta
Model	VFD040C43A-21
Category	DC Drives
Language	English