Torque Reference (Ac/Dc Drive Object) - ABB FDNA-01 User Manual

82 Communication profiles
For example, for an ODVA Speed Reference of 900 rpm with a unit
of 0.5 rpm, the drive speed reference is:

Torque Reference (AC/DC drive object)

This attribute is the torque reference for the drive. The units are
scaled by the Torque Scale attribute of the AC/DC drive object.
See Table 5. for details.
The adapter module provides the drive with a Torque Reference in
percent of the motor nominal torque. The ODVA AC/DC drive
profile uses Newton-meter (N·m) units for the Torque Reference.
The drive torque reference is calculated as follows:
where
Dtr = Drive torque reference in percent of motor nominal torque
Otr = ODVA Torque Reference
Ut = ODVA torque unit (see
Mt = Motor nominal torque in Nm.
For example, for a 1000 Nm motor nominal torque with a unit of 1
Nm and an ODVA Torque Reference of 500, the drive torque
reference is:
= × =
Dsr Osr Us
100
=
Dtr
11 ODVA TORQUE SCALE
× ×
100 Otr
=
Dtr
Mt
× =
900 0.5rpm 450rpm
× ×
Otr Ut
Mt
× ×
Ut 100 500 1
=
1000 Nm
on page 42)
Nm
=
50