Emerson FM-3 manual Home Examples, Home Limit Distance, Example 1 Linear Application

Operational Overview

Home Limit Distance

This parameter places an upper limit on the incremental distance the motor will travel during the home.

If no reference is found, the system will decelerate and stop at the limit distance. The Home Limit Distance Hit function will be activated if the home stops at the limit distance without finding the reference. Additionally, the Home.CommandComplete function will not turn “On” if the limit distance is hit.

Home Examples

Example 1: Linear Application

In this example, the system uses an external sensor and the motor’s encoder marker channel to establish a Home Reference Position. This is the most accurate and most common way to home.

Figure 16: Home to Sensor and Marker, Example

When the FM-3 module sees the Home Initiate, it accelerates the motor to the Home Velocity.

The motor continues at that velocity until it first senses the Home Sensor input. It continues at the same velocity until the motor’s encoder marker channel is sensed. The rising edge of the motor’s encoder marker channel is used to establish the reference position. Once the home reference is detected, the motor decelerates to a stop and moves to the offset position.

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