ABB ACS255 - 7. Quick Start-up and Control; Quick Start-up Terminal Control; Quick Start-up Keypad Control

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7. Quick Start-up and Control
7.1. Quick Start-up Terminal Control
When delivered, the ACS255 is in the factory default state, meaning that it is set to operate in terminal control mode and all parameters have
the default values as indicated in section 9.
 Perform mechanical and electrical installations per section 4 and 5.
 Connect the motor to the drive, ensuring the correct star/delta connection for the voltage rating - see section 5.6 on page 22.
 Apply the mains power to the drive, then enter the motor data from motor nameplate; 9905 = motor rated voltage, 9906 = motor
rated current, 9907 = motor rated frequency, & 9908 = motor rated speed.
 Connect the Drive Hardware Enable (STO) circuit as follows (see section 5.10.7 “STO” Electrical Installation for further details)
o Link Terminal 1 to Terminals 12 (STO +)
o Link Terminal 9 to Terminal 13 (STO -)
Note : If the “STO“ function is being utilised as part of an overall safety system then the circuit should be
installed and integrity tested as per the guidance given in section 5.10 “Safe Torque Off”.
 Connect a control switch between the control terminals 1 and 2 ensuring that the contact is open (drive disabled).
 Connect a potentiometer (1kΩ min to 10kΩ max) between terminals 5 and 7, and the wiper to terminal 6.
 With the potentiometer set to zero, switch on the supply to the drive. The display will show .
 Close the control switch, terminals 1-2. The drive is now ‘enabled’ and the output frequency/speed are controlled by the
potentiometer. The display shows zero speed in Hz (.) with the potentiometer turned to minimum.
 Turn the potentiometer to maximum. The motor will accelerate to 60Hz, the default value of parameter 2008, under the control of the
acceleration ramp time parameter 2202.
 If the potentiometer is turned to minimum, the motor will decelerate to 0Hz, the default minimum speed set in parameter 2007, under
the control of the deceleration ramp parameter 2203. The output speed can be adjusted anywhere between minimum and maximum
speed using the potentiometer.
 To display motor current (Amps), briefly press the (Navigate) key.
 Press again to display the motor power.
 Press again to display the estimated motor speed (RPM). (Motor nameplate RPM must be entered in 9908 = motor rated speed)
 Press again to return to speed (Hz) display.
 To stop the motor, disable the drive by opening the control switch (terminals 1-2).
 If the enable/disable switch is opened the drive will decelerate to stop at which time the display will show . If the potentiometer
is turned to zero with the enable/disable closed the display will show .(0.0Hz), if left like this for 20 seconds the drive will go
into standby mode, display shows , waiting for a speed reference signal.
7.2. Quick Start-up Keypad Control
To allow the ACS255 to be controlled from the keypad in a forward direction only, set parameter 1103 PRIMARY COMMAND SOURCE MODE to 1:
 Connect the drive to the supply, ensuring the correct voltage and fusing protection – see section 11.2 on page 59.
 Connect the motor to the drive, ensuring the correct star/delta connection for the voltage rating - see section 5.6 on page 22.
 Apply the mains power to the drive, then enter the motor data from motor nameplate; 9905 = motor rated voltage, 9906 = motor
rated current, 9907 = motor rated frequency.
 Connect the Drive Hardware Enable (STO) circuit as follows (see section 5.10.7 “STO“Electrical Installation for further details)
o Link Terminal 1 to Terminals 12 (STO +)
o Link Terminal 9 to Terminal 13 (STO -)
Note : If the “STO“ function is being utilised as part of an overall safety system then the circuit should be
installed and integrity tested as per the guidance given in section 5.10 “Safe Torque Off”.
 Connect a control switch between the control terminals 1 and 2 ensuring that the contact is open (drive disabled).
 Enable the drive by closing the switch between control terminals 1 & 2. The display will show .
 Press the key. The display shows ..
 Press to increase speed.
 The drive will run forward, increasing speed until is released.
 Press to decrease speed. The drive will decrease speed until is released. The rate of deceleration is limited by the
setting in parameter 2203.
 Press the key. The drive will decelerate to rest at the rate set in parameter 2203.
 The display will finally show  at which point the drive is disabled