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Commissioning ATV320 variable speed drive

Introduction

How to implement Schneider drives for simple applications.

How to quickly test a drive

This test can be used as a first phase during a more complex commissioning

Important precision

Schneider delivers new drives pre-configured in the same way. This set of parameters is called “Factory settings”. It is possible to return to the factory settings at any time:

Menu: CONF (Configuration) FCS (Factory settings)

FCSi (Source config) = ini (Macro-config) – factory configuration, return to the selected macro configuration

FrY (Parameter groups) = ALL (All) – all parameters (including function block program)

GFS (Return to factory settings) = YES (YES) – the parameter automatically returns to no at the end of the operation

This sheet considers that:

  • the parameters are at factory settings (in the case of a new product out of the box).
  • the motor to be driven is a classic 50 Hz squirrel cage motor and not a synchronous or slip-ring motor
  • the motor to be driven is of the same caliber as the motor
  • the commissioner knows how to use the graphic terminal or the display (validation, tree structure)

1) To run the engine with two straps

With the factory settings, the drive is configured to operate with a run command on logic input DI1 (forward direction) and with a speed reference on analog input AI1.

Wiring

Bridge terminal AI1 to terminal 10V.

Bridge the LI1 terminal to the + 24V terminal

Operation

As soon as DI1 is bridged to +24 (bridge between AI1 and +10 already made), the drive will start the motor and make it reach a speed of 50Hz.

As soon as DI1 is no longer bridged to +24, the drive will stop the motor.

2) Motor protection

Set the thermal protection of the drive to protect the motor. On the motor nameplate, store the nominal current and report it to the Ith parameter of the drive

Menu: CONF (Configuration) FULL SIM (Simply Start)

itH (Motor thermal current) = I motor nom (indicated on the motor nameplate)

3) Optimization / self-tuning (Tun) of the drive / motor assembly

This operation is not essential but it is strongly recommended, it allows, among other things, to optimize the currents (reduce them) which avoids overheating and allows energy savings.

Basically, you have to read the information from the motor nameplate and copy it to the drive, then start auto-tuning

The motor must be connected to the drive (downstream contactor active), the run command LI1 or LI2 must be deactivated. And the motor must be in a cold thermal state

Menu: COnF (Configuration) FULL SIM (Simply Start)

nPr (Motor rated power) = power indicated on the motor nameplate

unS (Motor rated voltage) = voltage indicated on the motor nameplate

nCr (Motor rated current) = current indicated on the motor nameplate

FrS (Motor rated frequency) = frequency indicated on the motor nameplate

nSP (Motor rated speed) = speed indicated on the motor nameplate

tun (Auto-tuning) = YES (Make tune) – press the dial for at least 2 seconds to validate / start the auto-tuning. If the autotuning went well, the parameter changes to nO.

These parameters can also be configured from the COnF (Configuration) menu FULL drC (Motor control)

4) Basic operation of the drive (potentiometer, reverse)

With the factory settings, the drive is configured to operate with a run command on digital input DI1 (forward direction) or on digital input DI2 (reverse direction) and with a speed reference on analog input AI1 . The ACC acceleration and DEC deceleration ramps are by default at a value of 3 seconds. The potentiometer will allow the speed to be varied from 0Hz (LSP parameter) to 50Hz (HSP parameter). The potentiometer must have a maximum value of 10kohm, knowing that the reference of the standard potentiometer at Schneider Electric is XB4BD912R4K7, with a value of 4.7kohm

Wiring

Connection principle of a potentiometer: complete resistance between terminals +10 and COM, the midpoint on AI1 Connection of potentiometer XB4BD912R4K7:

  • terminal ‘a’ of the potentiometer on COM ’terminal of the drive
  • terminal ‘c’ of the potentiometer on terminal ‘+10’ of the variator
  • terminal ‘b’ of the potentiometer on terminal AI1 ’of the drive

Dry contact between terminal DI1 on terminal + 24V for forward operation Dry contact between terminal DI2 on terminal + 24V for reverse operation

Operation

As soon as the contact on DI1 is closed, the drive will start the motor in the forward direction at the setpoint defined by the potentiometer (value between LSP and HSP) while respecting the ACC acceleration ramp.

As soon as the contact on DI1 is open, the drive will stop the motor while respecting the deceleration ramp DEC.

For motor operation in reverse direction, the principle is the same as for forward direction except that the contact on DI2 must be closed

It is possible to modify the values of the minimum and maximum speeds as well as those of the ramps (acceleration and deceleration)

Menu: COnF (Configuration) FULL SIM (Simply Start)

LSP = low speed (= 0 Hz in factory settings)

HSP = high speed (= 50hz in factory settings)

ACC = acceleration (= 3 seconds in factory settings)

DEC = deceleration (= 3 seconds in factory settings)

These parameters can also be configured from the COnF (Configuration) menu FULL SEt (Settings)

It is possible to modify the assignment of the logic input for the reverse direction Menu: COnF (Configuration)

FULL I_O- (Inputs Outputs)

rrS (Reverse display) = DI2 (factory settings)

Note: a 0-10V analog signal (sensor, PLC, etc.) can be connected to the COM and AI1 terminals instead of the potentiometer.

5) Operation of the drive with a 0-20mA or 4-20mA analog input

The ATV320 drive can operate with an analog current reference (0-20mA / 4-20mA configurable). This setpoint cannot be connected only to analog input AI3.

Wiring

Connection of the analog current signal on COM and AI3 Dry contact between terminal DI1 on terminal + 24V for forward operation

Setting

Menu: COnF (Configuration)

FULL I_O- (Inputs Outputs)

AI3 (AI3 configuration)

I3t (Type AI3.) = 0A (Current)

CrL3 (AI3 min value) = 0mA (factory settings). For a 4-20mA signal, this parameter must be set to 4mA.

CrH3 (AI3 maximum value) = 20mA (factory settings)

Menu: COnF (Configuration) FULL CtL (Command)

Fr1 (Channel ref. 1) = AI3 (analog input A3)

Operation

As soon as the contact on DI1 is closed, the drive will start the motor in the forward direction at the setpoint defined by the signal on analog input AI3, respecting the ACC acceleration ramp.

As soon as the contact on DI1 is open, the drive will stop the motor while respecting the deceleration ramp DEC.

Characteristic of analog input AI3

6) Operation of the drive with the thumbwheel and logic inputs

The principle is to vary the speed of the motor using the variable speed dial while maintaining the run command on logic input DI1.

Wiring

Dry contact between terminal DI1 on terminal + 24V for forward operation

Setting

Menu: COnF (Configuration) FULL CtL (Command)

CHCF (Profile) = SEP (separated)

Fr1 (Ref channel 1) = AIUI (virtual analog input 1) – only available if the CHCF parameter is not set to SIM.

Cd1 (Cde 1 channel) = tEr (terminals)

Operation

As soon as the contact on DI1 is closed, the drive will start the motor at the setpoint defined by the dial on the front face (value between LSP and HSP).

As soon as the contact on DI1 is open, the drive will stop the motor.

The speed variation is done by turning the dial, but you must first be in the AIUI parameter. Menu: rEF AIUI (Image of virtual input 1) This is a percentage value:

0% corresponds to the value of LSP (factory settings = 0Hz) 100% corresponds to the value of HSP (factory settings = 50Hz)

7) Operation of the drive with a remote display

It is not possible to operate the ATV320 drive locally (no RUN / STOP key) on the front of the product.

Compatible remote display

Setting

Menu: COnF (Configuration) FULL CtL (Command)

Fr1 (Channel ref. 1) = LCC (HMI – graphic display terminal or remote terminal)

CHCF (Profile) = SIM (Not separate)

Operation

The drive is controlled by the display.

  • The RUN key = motor operation at the defined setpoint
  • The STOP key = engine stop
  • The FWD / REV key = inversion of the direction of rotation of the motor (forward direction / reverse direction)
  • The ‘arrow up’, arrow down ’keys or the dial = modification of the speed reference

8) Operation of the drive with preset speeds

The principle of operation is to have different speed setpoints predefined and activated with the DI logic inputs. The combination of 4 logic inputs allows up to 16 preset speeds to be defined.

The preset speeds have priority over the analog setpoints (AI1, AI2 and AI3) The run order is defined on logic input DI1 (forward direction of the motor) or on logic input DI2 (reverse direction of the motor) This function is not preconfigured in factory settings

Wiring

Dry contact between terminal DI1 on terminal + 24V for forward run Dry contact between terminal DI3 on terminal + 24V for 2 preset speeds Dry contact between terminal DI4 on terminal + 24V for 4 preset speeds

Setting

Menu : COnF (Configuration) 

FULL FUN (App functions.)

PSS (Preselect Speeds)

PS2 (2 preset speeds) = DI3

PS4 (4 preset speeds) = DI4

SP2 (Preselect speed 2) = 10Hz (factory settings)

SP3 (Preselect speed 3) = 15Hz (factory settings)

SP4 (Preselect speed 4) = 20Hz (factory settings)

Operation

When only the contact on DI1 is closed, the speed reference is defined by the LSP parameter or on the analog input AI1. If nothing is connected to AI1 and LSP = 0Hz (factory setting value), the drive displays 0.0 (the motor is not running).

When the contacts on DI1 and DI3 are closed, the speed reference is defined on parameter SP2 (10Hz in factory settings).

When the contacts on DI1 and DI4 are closed, the speed reference is defined on parameter SP3 (15Hz in factory settings).

When the contacts on DI1, DI3 and DI4 are closed, the speed reference is defined on parameter SP4 (20Hz in factory settings)

Summary table of logic input / preset speed operation

9) Logic inputs: dry or pulse contact for controlling the drive.

The drive can be controlled by the logic inputs in 2 ways:

  • 2-wire control
  • The 3-wire control

2-wire control

The 2-wire control, the most often used, consists in using a dry contact for the operation of the drive. When the contact on DI1 closes, the drive starts the motor. As soon as this contact opens, the drive stops the motor.

By default, the engine is started and stopped by changing the edge on the logic input

  • from 0 to 1 for starting
  • from 1 to 0 for the stop.

This operating mode prevents all unwanted restarts after a power cut.

But it is possible to take into account the state of this logic input

  • state 1 for starting
  • state 0 for shutdown In the event of a power failure and if the logic input state is at 1, the ATV320 restarts up to the speed reference.

Menu : COnF (Configuration) 

FULL I_O- (Inputs Outputs)

tCt (2-wire control type) = trn (transition or edge) or LEL (level)

The 3-wire control

The 3-wire control consists of starting or stopping the motor with impulse pushbuttons (no need for maintained contacts) The stop is on logic input DI1 with a normally closed contact.

The run command is on logic input DI2 with a normally closed contact.

Reverse gear must be configured on a digital input DI and also operate with a normally closed contact.

10) NSt message and display of logic inputs, motor current

NSt display

The nSt message is a drive status.

This message appears if the drive is controlled by communication (ModBus, CANOpen, etc.) and is waiting for a command.

It also appears if the drive is controlled by the digital inputs DI In 2-wire control, the run command on input DI1 is already active when the drive is powered up. In this case, you must:

  • or open the contact on DI1 (the ATV320 then switches to rdy) then close the contact to start the engine.
  • or configure the drive to take into account the state of the logic input and not a change of edge
  • Menu: COnF (Configuration) FULL I_O- (Inputs Outputs) tCt (2-wire control type) = LEL (level)

In 3-wire control, the “stop” contact on DI1 is open. It must then be closed for the drive to switch to rdy.

Display of logic input states

If the logic input remains at 0, check the loop between +24 and the desired logic input. If the logic input is at 1, check the drive configuration Viewing the state of the logic inputs is useful in the event of a malfunction or incorrect operation of the drive via the terminal block (function not activated, drive does not start and always displays rdy, etc) Menu: MOn (Monitoring) IOM (I / O Image) LISI (Logic input states)

If the logic input remains at 0, check the loop between +24 and the desired logic input.

If the logic input is at 1, check the drive configuration

Motor current display

It is possible to display the value of the current supplied by the drive to the motor.

This reading can be useful for OCF (overcurrent) and OLF (motor overload) faults, or in the event of an application malfunction (does not operate at the desired speed setpoint).

Menu: MOn (Monitoring)

MMo (Engine status)

LCr (Motor current) -> measures the value of the current supplied by the drive to the motor

Download the ATV320 drive commissioning guide in PDF format

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