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Start permissives – Rockwell Automation 20A PowerFlex 70EC/700VC User Manual

Page 112

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108

Start Permissives

Absolute Min Mode

This mode regulates to the smallest absolute value of torque or speed, when the
torque reference and torque generated from the speed regulator are compared.

Position/Speed Profile Mode

The drive operates as a speed or position regulator as determined by the Profile Step
parameters (720-877) and Setup parameters (705-719). See "Position Indexer/
Speed Profiler" on

page 61

for complete description of this function.

Start Permissives

Start permissives are conditions required to permit the drive to start in any mode –
run, jog, auto-tune, etc. When all permissive conditions are met the drive is
considered ready to start. The ready condition is available as the drive ready status.

Permissive Conditions

1. No faults can be active.

2. No type2 alarms can be active.

3. The TB Enable input (if configured) must be closed.

4. The DC bus precharge logic must indicate it is a start permissive.

5. All Stop inputs must be negated (See special Digital Inputs Stops Configuration

issues below).

6. No configuration changes (parameters being modified) can be in-progress.

If all permissive conditions are met, a valid start, run or jog command will start the
drive. The status of all inhibit conditions, except for item

6

above, are reflected in

[Start Inhibits].

700VC

ONLY

700VC

ONLY

70EC

700VC

700H

✔ ✔

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