Setup, cont’d, P.272 — e-fld volts adj parameter – Rockwell Automation 1397 Enhanced Field Supply - 3010, 3020 User Manual

Page 10

1397 Enhanced Field Supply Card

1397-5.24 March, 2005

581

583

582

F2/35

LINE

F1/37

P.272 — E-Fld Volts Adj

Parameter

P.272 [E-Fld Volts Adj]

is used to match the drive’s rated field

voltage to different DC motor field voltages. A field voltage below the
motor’s rated value can operate the motor above rated base speed with
reduced torque. A voltage above the motor’s rated base speed however,
could also result in armature overvoltage and overheating of the
motor’s field windings.

Shown below and on the following page is the range of output motor
field voltages available using the Enhanced Field Supply Card. With
the Enhanced Field Supply Card, output voltage to the motor field is
set equal to the AC input line voltage times a line multiplier.

Where:

The Line Multiplier = The Motor Nameplate Field Voltage

AC Line Input Voltage

The following line multipliers correspond to an Enhanced Field Supply
Jumper setting of either

A-C

B-C

. The shaded values shown

correspond to settings for parameter

P.272 [E-Fld Volts Adj]

as explained

in the example on the following page. Jumper J21 on the drive’s
Regulator Board must then be set to match the calculated

A-C

B-C

range.

A-C Jumper Settings

Enhanced Field Supply Jumper Set to A-C

Drive Input Volts

Minimum Output Motor Field Volts

Maximum Output Motor Field
Volts

230/460VAC

VDC = 0.9

× VAC

VDC = 1.12

× VAC

P.272

→

↓

000

0.9003

0.9004

0.9005

0.9006

0.9009

0.9012

0.9015

0.9020

0.9025

0.9031

010

0.9037

0.9045

0.9052

0.9061

0.9070

0.9080

0.9090

0.9102

0.9113

0.9126

020

0.9139

0.9153

0.9167

0.9182

0.9198

0.9214

0.9231

0.9248

0.9267

0.9285

030

0.9305

0.9325

0.9345

0.9366

0.9388

0.9410

0.9433

0.9456

0.9480

0.9505

040

0.9530

0.9555

0.9581

0.9608

0.9635

0.9662

0.9690

0.9719

0.9748

0.9777

050

0.9807

0.9837

0.9868

0.9899

0.9931

0.9963

0.9995

1.0028

1.0061

1.0095

060

1.0129

1.0162

1.0196

1.0229

1.0262

1.0294

1.0326

1.0358

1.0389

1.0420

070

1.0450

1.0480

1.0509

1.0538

1.0567

1.0595

1.0622

1.0649

1.0676

1.0702

080

1.0727

1.0752

1.0777

1.0801

1.0824

1.0847

1.8690

1.0891

1.0912

1.0932

090

1.0952

1.0972

1.0990

1.1009

1.1026

1.1043

1.1059

1.1075

1.1090

1.1104

100

1.1118

1.1131

1.1144

1.1156

1.1167

1.1177

1.1187

1.1196

1.1205

1.1213

110

1.1220

1.1226

1.1232

1.1237

1.1242

1.1245

1.1248

1.1251

1.1253

1.1254

120

1.1252

—

Setup, Cont’d