P.054 level sense start enable – Rockwell Automation GV3000/SE 230VAC 1-20 HP GP & Vector Drive Ver. 6.04 Software Start-Up and Ref. User Manual

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GV3000/SE 230 VAC Drive, Software Reference Version 6.04

P.054 Level Sense Start Enable

(continued)

Figure 4.7 shows the start, stop, and running status of the drive when configured for
edge control versus level control.

Figure 4.7 – Drive Start, Stop, and Running Status when Configured for Edge Control vs. Level Control

Note that when operating from the terminal strip (rE) or a network option, an edge is
required at the start input for the following two conditions, even if P.054 = ON:

The front panel keypad/display or OIM/CS3000 STOP key is pressed.

After a vector self-tuning procedure.

These forced edge requirements do not apply if the control source is changed to
any other value and then back again as shown in the following example.

Example

Assume the selected control source is the terminal strip (P.000 = rE), level sense
start is enabled (P.054 = ON), no faults are active, and both the start and stop
inputs are closed. The drive, therefore, is running.

The drive is stopped using the front-panel STOP key. The drive now waits for an
open-to-close edge on the terminal strip start input to restart.

The control source is changed to any value other than rE. This is done by
changing P.000 to any value but rE or toggling the REM/LOC switch.

The control source is then changed back to the terminal strip (rE).

Since the start input is still closed, the drive starts. A start edge is no longer
required because switching from the terminal strip and back again effectively acts
as an edge.

Edge-Sensitive Start

Level-Sensitive Start

START

START

RUNNING

RUNNING

STOP

STOP

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