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Cello Installation Guide
MAN-CELIG (Ver. 1.5)
Chapter 2: Introduction
This installation guide describes the Cello servo drive and the steps for its wiring,
installation and powering up. Following these guidelines ensures maximum
functionality of the drive and the system to which it is connected.
2.1
Drive Description
The Cello is a powerful servo drive that operates in digital current, velocity, position
and advanced position modes, in conjunction with a permanent-magnet synchronous
brushless motor or DC brush motor. The Cello features flexible sinusoidal and
trapezoidal commutation, with vector control. The Cello can operate as a stand-alone
device or as part of a multi-axis network in a distributed configuration.
The Cello drive is set up and tuned using Elmo's Composer software. This Windows-
based application enables users to quickly and simply configure the servo drive for
optimal use with their motor.
Power to the Cello is provided by a 10 to 195 VDC source. A "smart" control-supply
algorithm enables the Cello to operate with the power supply only, with no need for an
auxiliary 24 Volt supply. If backup functionality is required for storing control
parameters in case of power-outs, an external 24 VDC power supply can be connected,
providing maximum flexibility and optional backup functionality when needed.
Two variations of the Cello are available: the Standard version and the Advanced
version, which features advanced positioning capabilities. Both versions operate with
RS-232 and/or CANopen communication.
2.2
Product Features
2.2.1
Current Control
Fully digital
Sinusoidal commutation with vector control or trapezoidal commutation
with encoder and/or digital Hall sensors
12-bit current loop resolution
Automatic gain scheduling, to compensate for variations in the DC bus
power supply
2.2.2
Velocity Control
Fully digital
Programmable PI and FFW (feed forward) control filters
Sample rate two times current loop sample time
"On-the-fly" gain scheduling
Automatic, manual and advanced manual tuning and determination of
optimal gain and phase margins
Introduction
2-1
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