Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 264)

Chapter 8
Start–Up
8-20
Current Loop Tune – This procedure calibrates the current loop gain
based on the information generated by the current loop test.
1. Select the current tune option (Drive Setup/Autotune/Current
Tune) on the program terminal.
2. Follow the instructions given by the Program Terminal.
3. The Program Terminal will indicate when the tuning has been
completed. The test just performed writes the value of Parameters
735 and 736 when option to save in EEPROM is executed..
Velocity Loop Motor Test – This procedure calculates the motor inertia.
If the motor inertia is known, it can be entered directly into Parameter 613
and you can proceed to the Velocity Loop System Test.
1. Verify that the motor is disconnected from the machine (the motor is
not loaded). If the motor cannot be disconnected, user must
program Parameter 613 based on the motor inertia.
2. Select the Velocity Motor Test option (Drive Setup/Autotune/
VelMtr Test) on the program terminal.
!
ATTENTION: The Velocity Motor Test closes the Drive contactor
and operates the motor up to speed specified by Parameter 699.
IMPORTANT: The Drive start command must be true for the entire time
the test is being performed. If a stop command is issued anytime during
the test, the motor will stop and the test will be aborted. Check Parameter
624 (maintain start) to determine if the start command is latched or
momentary.
3. Start the Drive when requested to do so by the program terminal.
The motor will begin to accelerate to the speed specified by
Parameter 699 (Auto Tune Speed) at the armature current specified
by Parameter 698
(Autotune I Lim). When it reaches that speed it will begin to
decelerate to zero speed.
Note: If the test fails on a motor stalled (VP-18) or Profile Timeout
(VP-50) the Auto Tune I Limit (698) may be set too low. Increase
the value of Parameter 698 and run the test again. When the test is
complete, the Drive contactor will drop out and the program
terminal will indicate the status of the test.
4. If the test was successful, continue to the Velocity System Test,
otherwise refer to the Troubleshooting Manual.
Velocity Loop System Test – This procedure calculates the system inertia
(Parameter 703), maximum bandwidth (Parameter 701). If these values
are known they can be entered directly and you can proceed to the Field
Flux Tuning procedure.
1. Connect the motor to the machine.