Follower; Ds9000 System Start-Up; System Components; Installation - Seco DS9000 Installation & Operation Manual

1.9.2

FOLLOWER

In the Follower mode the set-point is calculated by multiplying the Follower reference frequency
signal by a ratio entered on the DS9000 keypad by the operator.
Example:
Reference input 1800 RPM with 60 PPR generator
Ratio 0.500
Set-point is 900 RPM
As happens in the Set-Point control Mode the DS9000 compares the Set-point signal with the
feedback signal and provides an analog output to the ac or dc drives so as to reduce the speed error to
zero. In the Follower mode the DS9000 will bring the pulses on the output shaft into synchronization
with the pulses of the Follower reference thus providing a "position lock" on the two shafts. If the
ratio is changed while running the position counters are set to zero and synchronization will restart at
that point.
2.0

DS9000 SYSTEM START-UP

2.1

SYSTEM COMPONENTS

A complete DS9000 drive system consists of:
DS9000 Digital Speed Controller
AC or DC Adjustable Speed Drive
AC or DC Motor with Pulse generator mounted
The AC or DC drive must be able to be controlled by a 0-10VDC input signal and must be fully
operational and capable of driving the connected load at the correct speed. The AC or DC motor
controlled by the drive must be fully operational and have a Pulse Generator mounted on it. The pulse
generator can be a Magnetic Pick-up (Seco MTK type) or Encoder or Hall Effect device.
2.2

INSTALLATION

The procedure describes the installation of the DS9000 controller.
In cases where the digital speed controller is integrated into a customer-designed drive system, the
buyer is responsible for the correct choice of required associated equipment. Incorrectly specified
components may cause improper operation and/or damage to the digital speed controller.
Only qualified maintenance personnel should install the controller. They should be familiar with
drive systems – including operation – and with the possible hazards resulting from improper
installation practices. Serious personal injury and/or equipment damage could result if this warning is
not observed.
The user is responsible for installation for the entire drive system in accordance with NFPA No. 70;
with Electrical Standards for Metal-working Machine Tools, NFPA No. 70; and with all local and
national codes which apply. Serious personal injury, death and /or equipment damage could result if
this procedure is not followed.
Caution
Warning
Danger
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