Rockwell Automation 1397 AC Tachometer Interface Card - Manual (Page 8)

8 Allen-Bradley 1397 AC Tachometer Interface Card
AC Tachometer Parameter Settings
To finish configuring the card for the selected AC Tachometer, up to (4)
parameters must be set depending upon the application. When setting AC
tachometer parameters, P.194 [Anlg Tach Fdbk] may be used to “zero” the
tachometer as indicated.
P.039 – Set Feedback Type to AC Tach
This parameter is set to match the type of drive feedback signal used.
Default Value = Arm Volt
P.047 – Set Anlg Tach V/1000 to the AC Tachometer’s Nameplate Voltage/1000.
The Same Value Set in Step 1 on Page 2
This parameter along with P.041 is used by the drive to calculate the value
of the tachometer’s range.
Default Value = 18.0 volts/1000
P.057 – Reset Anlg Tach Gain Only if Required
This is an advanced setup parameter used to scale the AC tachometer
feedback signal only after all AC tachometer installation is complete and
then only if required. Refer to the Start-Up and Adjustment procedures in
the 1397 User Manual as well as any tachometer instructions included with
the Reliance tachometer kit for additional information.
Default Value = 0
P.058 – Reset Anlg Tach Zero Only if Required
This is an advanced setup parameter used to remove any hardware induced
offset from the AC tachometer feedback loop signal. If the value of P.194
[Anlg Tach Fdbk] is some value other than zero, P.194 is “zeroed” using a
corrective + or – P.058 value.
Default Value = 1.000
!
ATTENTION: The incorrect setting of parameters P.039, P.047,
P.057 and P.058 can cause an overspeed condition. Both
parameters must be set by a qualified person who understands the
significance of setting them. Set the value of these parameters
accurately per your application requirements. Failure to observe
this precaution could result in bodily injury.
Publication 1397-5.22 Ð December, 2001
Supersedes March, 1997 Copyright © 2001 Rockwell Automation. All rights reserved. Printed in USA.