LAM Technologies DS10 Series, User Manual

Page: 51 / 72

DS10xx Functionality and Setting
51
5.5 Protections
5.5.1 General description
The driver is equipped with efficient protections which protect its integrity
whenever one of the most common problems occurs. Furthermore, some
alarms have been implemented; they can detect positioning errors even
before the motor starts to move.
In spite of the care and attention used in the development and
manufacturing of the driver, an installation or an use not in compliance
with the indications present in this manual, or out of stated maximum
limits, can damage the driver permanently.
Through the configuration it is possible to define the driver behavior on the
occurring of the various alarm conditions.
For example, it is possible to choose and make permanent an alarm or to set
the driver so that it is automatically re-enabled as soon the alarm condition
is ceased. For a detailed description about the various configuration options
see chapter 5.2.5 Alarms and Protections conditioning.
When there is at least an alarm signal the driver is not active and the motor
is not supplied, consequently the torque is null.
5.5.2 Under voltage
The under voltage alarm intervenes when the driver supply voltage is
inferior to the
Vpl value. Such value varies according to the driver model
as per the following table.
Vpl value Model
Min Typ Max
Unit
DS1044 20 Vdc
DS1048 20 Vdc
DS1073 24 Vdc
DS1076 24 Vdc
DS1078 24 Vdc
DS1084 45 Vdc
DS1087 45 Vdc
DS1098 45 Vdc
The driver constantly verifies the supply voltage value; it is sufficient this
goes beyond the
Vpl threshold for few instants to generate the under
voltage alarm. It does not have to be astonishing the fact that the protection
intervenes despite the measured voltage is within the functioning limits, as
it is possible that, because of the main supply fluctuations or cables length,
the voltage that effectively reaches the driver becomes, in particular
moments (for example during the motor acceleration phase), inferior to
Vpl
value.
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