Chapter 5 Manually Tuning The 1395 Drive; Introduction; Tools & Test Equipment; Current Loop Tuning - Allen-Bradley 1395 Troubleshooting Manual

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Introduction

Tools & Test Equipment

Current Loop Tuning

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Manually Tuning the 1395 Drive
This chapter provides the basic guidelines for manually tuning the 1395
Drive. Procedures performed in this chapter include the following:
• Current loop tuning
• Velocity loop tuning
• Field Flux tuning
ATTENTION: Only qualified Allen-Bradley Personnel familiar
!
with the Bulletin 1395 Drive system and the associated
machinery should attempt to manually tune the Drive. Failure to
comply may result in personal injury and/or equipment damage.
In addition to a Bulletin 1300 Programming Terminal the following should
be available before attempting to manually tune the Drive:
• Digital Volt Meter
• Discrete Adapter Board
• Oscilloscope - A digital storage scope is preferred, but an analog scope
can be used.
The following steps command an armature current reference in order to
determine the level at which armature current just reaches continuous
conduction. This value is then used to calculate Kp (proportional gain) and
Ki (integral gain) of the current loop. The following instructions are
provided to "fine tune" the AC line and Armature voltage sensing.
This procedure assumes that a Discrete Adapter Board is located in the left
port (port A). If the Discrete board is in Port B, parameters must be adjusted
accordingly.
ATTENTION: As a safety precaution, have available an
!
"ECOAST" switch to disable the drive in the event of inadvertent
motor rotation. If possible, disconnect or disengage the motor
shaft from the machine and "lock" the motor shaft.
1. Monitor TP2 - Current Feedback
2. Set Accel & Decel rates to 0.1 sec.
3. Set FWD & REV Current Limits to 15%
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