ABB's latest ac drive brings greater performance, easier commissioning and simpler programming, allowing the drive to be used in a wide range of applications.
Called the ACS 800, the new drive series is up to 50 per cent smaller than its equivalent predecessor in the ACS 600 range.
The drive features ABB's direct torque control giving a rapid response to variations in motor load and allowing smoother operation. The ACS 800 is fitted with integral RFI filters and chokes; everything is inside the drive.
Easier commissioning is achieved through the use of ‘Start-Up Assistant’ that helps the user through the installation, while complex programming is easily achieved using Adaptive Programming.
The Start-up Assistant is a standard tool that makes commissioning the drive quick and easy.
This time saving feature guides the user through the commissioning procedure and helps select the application's most important settings. It automatically detects when the drive is turned on for the first time and offers guided commissioning.
Motor nominal values are requested as well as I/O configuration and application specific parameters. If option modules, like I/O extensions or fieldbus modules, are installed, the Start-up Assistant detects and offers guided commissioning for that module.
To make installation easier and more informative, there is an on-line information system available at each stage, offering useful hints, such as limits for allowed motor nominal values. Each step is also cross-referenced to the manual, if more detailed information is needed.
The new ACS 800 features Adaptive Programming, which extends the programmable I/O and extensive parameter selections that make the ACS 800 one of the most flexible ac drives in the market.
Adaptive Programming consists of a set of blocks that can be programmed to perform any operation from a predefined set of functions. All common mathematical and logical functions as well as switches, comparators, filters and timers are available. Using the blocks simplifies detailed programming.
Users freely define inputs to the blocks, wiring between the blocks and connections to the drive I/O or to the drive control. Users can create new input and/or output signals and modify the drive's speed or torque control.
It can also be used as a small PLC for controlling external devices like auxiliary pumps. It is possible to integrate user-specified functions into the ACS 800, which are traditionally done with additional equipment like relays and timers.
A further breakthrough is that programming is carried out using the standard control panel. No special hardware or software programming tools are needed. As such, the programming takes a few minutes and can be carried out on-site during commissioning.
The panel's multilingual plain text display is suitable for Adaptive Programming as well as for the Start-up Assistant, for drive monitoring and for normal parameter setting.
Everything that is needed in an ac drive can be mounted inside the drive including integrated RFI-filters chokes, brake choppers, I/O extensions, fieldbuses and pulse encoder module.
This makes the ACS 800 extremely easy and fast to install. There is no need to reserve extra space and no extra cabling is needed, saving substantial costs.
Inside the drive, slots for up to three plug-in option modules and other accessories are also available, removing the need for external extension modules.
An additional enclosure extension can be added to give a wide variety of accessories, such as a contactor with an emergency stop button or a customer terminal block.
The drive is backward compatible with the previous ACS 600 family. The parameters have the same name and scaling; there is no need to change the PLC programme that communicates with the ACS 800; and there is no need to draw new circuit diagrams.
Initially the ACS 800 will be rated from 1.1kW to 500kW and at supply voltages of 380V to 500V.