Absolute Positioning; Encoder Battery Installation - Allen-Bradley Ultra1500 2092-DA1 User Manual

5-16 Ultra1500 Application Examples

Absolute Positioning

Publication 2092-UM001D-EN-P — July 2005
The Ultra1500 can be used with the TL-Series motors, which have serial
encoders with battery-backed, multi-turn absolute position capability. The
absolute position of the motor is read from the encoder by the drive, and the
drive in turn provides the absolute position to the external controller.

Encoder Battery Installation

In order to make use of the multi-turn absolute capability of the TL-Series
motors, a 3.6V battery must be connected to the motor. The Ultra1500
provides two methods to connect a battery. The easiest method is to install a
½-size AA lithium battery, as shown in Figure 5.4, in the battery compartment
of the Ultra1500.
Figure 5.4
Ultra1500 Battery Installation.
Battery connector is keyed:
Flat surface faces front of drive,
Rounded surfaces face inward.
To install a new battery, or replace an existing battery; perform the following
steps:
1. For a new installation or if a battery low voltage fault has occurred,
remove main and control AC power from the drive. Otherwise, if this is a
maintenance update or if a battery low voltage warning has occurred,
remove only the main AC power but retain the control AC power so that
the absolute position of the motor is not lost when the existing battery is
disconnected.
2. Open the BATT compartment door. See Figure 5.4 for location. If the
battery needs to be removed, disconnect battery by carefully pulling
downward on the connector. Slightly raise the BATT door for clearance,
and slide battery out of the drive. Note: Pressure is best applied to both
sides of the connector. A needle nose pliers or similar tool can be used to
apply pressure.
Positive wire (red) on Negative wire (black) on
left-side of connector. right-side of connector.
Battery connector installed on
Ultra1500 drive
When disconnecting the battery, pressure
is best applied to both sides of the
connector.
A needle nose plier or similar tool can be
used to apply pressure.