Emerson unidrive m200 - Sequencer State Machine Inputs; Enable Stop Key; Enable Auxiliary Key

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shown as bits in EnableConditions (06.010) as given in the table below.

Enable Conditions

(06.010) bits

Enable condition

0 HardwareEnable (06.029)

1 DriveEnable (06.015)

2 0 if auto tune completed or trip during auto-tune, but drive needs to be disabled and re-enabled

3 Reserved

4 Reserved

5 Zero until the drive thermal model has obtained temperatures from all drive thermistors at least once

Zero until all option modules that are present in the drive have indicated that they are ready to run or the system

has timed out waiting for this.

7 Reserved

8-10 Reserved

11 Zero if the drive is in standby mode. See StandbyModeEnable (06.060)

Because of the limited number of segments on drives with an LED display, these drives will indicate the parameter value as a decimal value rather

than a binary value.

Parameter 06.011 Sequencer State Machine Inputs

Short description Displays the states of inputs into the sequencer state machine

Mode Open‑loop

Minimum

(Display: 0000000)

Maximum

127

(Display: 1111111)

Default Units

Type 8 Bit Volatile Update Rate 4ms

Display Format Binary Decimal Places 0

Coding RO, ND, NC, PT, BU

The bits in SequencerStateMachineInputs (06.011) show the state of the inputs to the sequencer state machine as given in the tables below:

Sequencer State Machine Inputs (06.011) bits Signal Indicates

0 Final drive enable The drive inverter is allowed to be enabled.

1 Final drive run The motor can move away from standstill.

2 UnderVoltageActive (10.016) The under voltage condition has been detected.

3 ZeroFrequency (10.003) Indicated when the motor has stopped.

4 Drive tripped The drive is tripped.

5 Limitswitchactive (10.066) Limit switch is active

6 SupplyLoss (10.015) Supply loss condition has been detected.

Because of the limited number of segments on drives with an LED display, these drives will indicate the parameter value as a decimal value rather

than a binary value.

Parameter 06.012 Enable Stop Key

Short description Set to 1 to enable the use of the stop key

Mode Open‑loop

Minimum 0 Maximum 1

Default 0 Units

Type 1 Bit User Save Update Rate Background read

Display Format Standard Decimal Places 0

Coding RW

The Stop key can be used to stop the drive if EnableStopKey (06.012) = 1 or Keypad command is selected (see ReferenceSelector (01.014)).

If EnableStopKey (06.012)= 0 and Keypad command is not selected. The Stop key is not active and can be used to initiate a drive reset without stopping the drive from running.

If EnableStopKey (06.012) = 1 or Keypad command is selected, the drive reset can be initiated without stopping the drive by holding the Run key and then pressing the Stop key.

The Stop key is also used to reset the drive from the keypad.

It should be noted that if the drive is tripped and is then reset from any source other than the keypad Stop key then the drive may start immediately under the following conditions:

1. EnableSequencerLatching (06.040) = 0, the Final drive enable is active and one of the sequencer bits (RunForward (06.030), RunReverse (06.032) or Run (06.034) is active.

2. EnableSequencerLatching (06.040) = 1, the Final drive enable is active, NotStop (06.039) is active and one of the sequencer bits (RunForward (06.030), RunReverse (06.032) or

Run (06.034) is active.

The drive sequencer has been designed so that pressing the Stop key, whatever the value of EnableStopKey (06.012) or the Command Selection, does not make the drive state change from

stopped to running. As pressing the Stop key could reset a drive trip which could then restart the drive, the run output from the sequencer is held off until the following conditions are met when

the drive is tripped and the Stop key is pressed.

1. RunForward (06.030) = 0 and RunReverse (06.032) = 0 and Run (06.034) = 0*

2. OR RunForward (06.030) = 1 and RunReverse (06.032) = 1 for at least 60ms*

3. OR The Final drive enable = 0

4. OR The sequencer is in the UNDER_VOLTAGE state

5. OR If EnableSequencerLatching (06.040) = 1, NotStop (06.039) = 0

* If EnableSequencerLatching (06.040) = 1 then the state of these sequencer bits must be 0 at the output of their latches.

Once the necessary conditions have been met the drive can then be restarted by activating the necessary bits for a normal start.

Parameter 06.013 Enable Auxiliary Key

Short description Defines the behaviour of the drive when the auxilliary button is pressed

Mode Open‑loop

Minimum 0 Maximum 2