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Commissioning ATV12 variable speed drive

Introduction

How to set up the ATV12 drive for simple applications.

How to quickly test this 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 setting”. It is possible to return to the factory setting at any time:

CONF FCS menu = InI (with long press for 2s)

This sheet considers that:

  • the parameters are at the factory setting (for 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 turn the engine forward or backward (two straps)

Wiring

  • Bridge terminal AI1 (analog reference) to terminal +5.
  • Bridge the LI1 terminal to the + 24V terminal

Operation

Forward

As soon as LI1 is bridged, the drive will immediately start the motor in the Forward direction and make it reach the speed written in the HSP (High Speed) parameter, ie: 50 Hz ~ 1500 rpm for a conventional motor.

Acceleration and deceleration ramps

Whatever the direction, the drive will respect the acceleration and acceleration ramps of the ACC and DEC parameters set at 3 seconds.

To decrease or increase the speed, the acceleration and deceleration ramps

Go to the CONF => menu and modify the parameters

• LSP : low speed,

• HSP : great speed,

• ACC : acceleration,

• DEC : deceleration,

Example for the HSP parameter:

CONF menu => HSP = 40 (if the desired speed is 40Hz)

Reverse

It is possible to assign LI1 to reverse but to remain consistent, it is better to leave LI1 to run forward and to assign LI2 to reverse.

  • Configure Menu CONF => FULL => FUN => rrS = L2H
  • Bridge LI2 instead of LI1.

Note: Instead of strapping LI1 and the polarity, use the contact of a rotary button or a push button or a PLC output.

Advice: If this operating mode is sufficient, finalize the commissioning with sections 7 and 8:

• Motor thermal protection

• Self-tuning

NSt: if the Nst state appears on power-up, apply section 8.

2) Vary the speed with a potentiometer (wiring a potentiometer, a strap)

Setting

  • Check if the LSP parameter is at the value 0 => see 1) (no need if the ATV is in factory setting)
  • Check if the HSP parameter is the value 50 => see 1) (not necessary if the ATV is in factory setting)

Wiring

  • Use a potentiometer with a maximum value of 10 kohms, the reference SZ1RV1202 is the Schneider potentiometer standard: value 2.2 kohms.

Connect the potentiometer as follows: full resistance between

the + 5V and COM terminals and the midpoint in AI1

  • Bridge terminal LI1 (Forward) of the terminal block to the + 24V terminal

Operation

As soon as LI1 is bridged, the drive will immediately start the motor in the Forward direction and make it reach the speed defined by the 0-5 V analog input corresponding to 0- 50 Hz

The drive starts up, follows the acceleration ramps and reaches its speed setpoint determined by the potentiometer. The operator can then very easily change the speed setpoint.

Note: Instead of strapping LI1 and the polarity, use the contact of a rotary button or a push button or a PLC output.

Advice: If this operating mode is sufficient, finalize the commissioning with sections 7 and 8:

• Motor thermal protection

• Self-tuning

NSt state: if the Nst fault appears on power-up, apply section 8.

3) Vary the speed using the dial on the keyboard, the run commands remain from the terminal block (one strap, one parameter)

Setting

  • Check if the LSP parameter is at the value 0 => see 1) (no need if the ATV is in factory setting)
  • Check if the HSP parameter is the value 50 => see 1) (not necessary if the ATV is in factory setting)
  • Configure the separation of the setpoint and command channels Menu CONF => FULL => CTL => CHCF = SEP
  • Configure the reference channel using the dial on the keypad Menu CONF => Fr1 = A1U1
  • Assign the command channel to the keypad Menu CONF => FULL => CTL => CD1 = TER
  • Warning: go to the following parameter: Menu rEF => A1U1

Wiring

  • Bridge terminal LI1 (Forward) of the terminal block to the + 24V terminal

Operation

  • start by activating LI1
  • turn the dial to accelerate or slow down, this only works if the keyboard display is on the menu parameter rEF => A1U1

Note: Instead of strapping LI1 and the polarity, use the contact of a rotary button or a push button or a PLC output.

Advice: If this operating mode is sufficient, finalize the commissioning with sections 7 and 8:

• Motor thermal protection

• Self-tuning

NSt: if the Nst state appears on power-up, apply section 8.

4) Vary the speed with a 0-20mA or 4-20mA input (current input wiring, a strap, one to two parameters)

Setting

  • Check if the LSP parameter is at value 0: CONF LSP menu = 0 (not necessary if factory setting)
  • Check whether the HSP parameter is at the value 50: CONF LSP menu = 50 (not necessary if factory setting)
  • Configure AI1t so that the analog input AI1 is recognized as a current input and not as a voltage input:

Menu CONF => FULL => I/O => AI1t = 0A

  • If the current input is a 4-20 mA input, the configuration is complete,
  • If the input is a 0-20mA input, set CrL1:

Menu CONF => FULL => I/O => CrL1 = 0

Wiring

  • Connect the 4-20 or 0-20 mA analog input between the IA1 and COM terminals

Operation

  • Bridge terminal LI1 (Forward) of the terminal block to the + 24V terminal

The drive starts following the acceleration ramps and reaches the speed setpoint determined by the current input.

Note: Instead of strapping LI1 and the polarity, use the contact of a rotary button or a push button or a PLC output.

Advice: If this operating mode is sufficient, finalize the commissioning with sections 7 and 8:

• Motor thermal protection

• Self-tuning

NSt: if the Nst state appears on power-up, apply section 8.

5) Use of preset speeds and a potentiometer for variable speed (5 parameters and 3 straps)

The ATV12 drive can be used to very quickly configure 3 preset speeds + a speed whose reference is provided by the potentiometer

Setting

The ” Macro configuration ” setting should be forced to ” Speed ”

Menu CONF => FULL => CFG = Spd

Menu CONF => Fr1 = A11

Wiring

When the Run command is activated via LI1 bridged to 24, the drive will deliver the following speeds by bridging the various inputs LI1, LI2 and LI3 of the drive terminal block.

• LI1 bridged to 24V, LI3 and LI4 not bridged => speed given by the potentiometer

• LI1 and LI3 bridged to 24 => 10 Hz: slow speed

• LI1 and LI4 bridged to 24 => 25 Hz: medium speed

• LI1, LI3 and LI4 bridged to 24 => 50 Hz: fast speed

Modification of pre-programmed speeds

The speeds of 10, 25 and 50 Hz can be easily modified, if for example you want:

  • slow speed of 5 Hz if input LI3 is activated
  • average speed of 45 Hz if input LI4 is activated
  • fast speed of 50hz if LI3 and LI4 are activated

It will suffice to configure:

FULL => Menu FUN 

PSS  PS2 = L3H PS4 = L4H

FULL => Menu FUN  PSS  SP2 = 5 Hz

SP3 = 45 Hz SP4 = 50 Hz

Note: Instead of strapping LI1 and the polarity, use the contact of a rotary button or a push button or a PLC output.

Advice: If this operating mode is sufficient, finalize the commissioning with sections 7 and 8:

• Motor thermal protection

• Self-tuning

NSt: if the Nst state appears on power-up, apply section 8.

6) Protect the motor (one parameter)

  • 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:

FULL => FLt => tHt => ItH = Motor nominal I (plated)

7) Optimization or auto-tuning or Tuning of the drive / motor assembly (6 parameters)

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.

In practice, it is a matter of reading the information from the motor nameplate and copying it to the drive, then launching Tun or autotuning

The motor must be connected to the drive (downstream contactor active) and the LI1 or LI2 run command must be deactivated.

FULL => Menu drC => UnS = rated nominal motor voltage

FrS = Plated nominal motor frequency nCr = Plated nominal motor current nSP = Plated motor rotation speed in rpm nPr = fixed motor power (leave in default value) tUn = YES: validate with the ENT key for at least 2 sec. If the autotuning operation went well, tUn changes to Done (done)

8) To resolve the Nst state on power-up

Nst is a drive standby state

  • waiting for a command by bus or communication network (CanOpen, Modbus, TCP / IP, ..). . the drive is wired. If you want to test the drive out of communication, with the terminal block or the display, un-wire the drive and force it to factory settings
  • waiting for a correct order from the terminal block if the drive is not wired to a network or a bus

The tCt [2-wire control type] parameter is set to the trn [Transition] value in the factory setting, this setting indicates that a transition or edge state change is required to start operation in order to avoid an untimely restart after a power interruption. This configuration can cause NST faults when the power is turned back on, to avoid:

  • check that the product is in 2-wire control, position it in this configuration: Menu CONF FULL => I / O => tCC => 2C
  • all you have to do is set the tCt [2-wire control type] parameter to the LEL value [Level] (state 0 or 1 is taken into account for running or stopping):

Menu CONF  FULL  I/O  tCt = LEL

Please note, the product restarts when the power is turned on; check if the safety of goods and people is taken into account

9) To run the engine only with the integrated display (one parameter)

Setting

Force parameter Fr1 to A1U1

Menu CONF => Fr1 = A1U1

Operation

From the keyboard:

  • Go to the reF => A1U1 parameter
  • RUN for motor operation
  • STOP / RESET for engine stop
  • Turn the dial to accelerate or decelerate

Download the ATV12 drive commissioning guide in PDF format

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