1. The document discusses how to perform autotuning for DC motors driven by a DCS800 controller. Autotuning can be done for the field current controller, armature current controller, and speed controller. 2. For autotuning the armature current controller, some interlocks must first be addressed including ensuring the main breaker is closed, the motor is uncoupled from equipment, and lubrication/hydraulic units for the equipment are running. 3. The procedure for autotuning the armature current controller involves switching the drive to local mode, setting a parameter to initiate armature current autotuning, activating an icon to open the shear breaker, and allowing the motor speed to reach base speed

1. EFS-EM-BM 27-05-2014
Subject: How to perform AUTOTUNING for DC motors.
Equipment type: DC motors driven by DCS800.
Reported to: Eng. Ahmed Ali
Eng. Ahmed Nour Reported by: M Hassan
We can make Auto tuning for:
1-Field current controller: When the auto tuning is finished successfully
Will affect on [M1KpFex (44.02), M1TiFex (44.03) and M1PosLimCtrl (45.02)]
2-Armture current controller: When the auto tuning is finished successfully
Will affect on [M1KpArmCur (43.06), M1TiArmCur (43.07), M1DiscontCurLim (43.08), M1ArmLim
(43.09) and M1ArmR (43.10)]
3-Speed controller: When the auto tuning is finished successfully
Will affect on [KpS (24.03) and TiS (24.09)]
Note: The type of the selected auto tuning is detected upon the case we have.
In this report the auto tuning of the armature circuit will be discussed.
Before carrying out the procedure attention must be paid for some interlocks:
1- The main incoming circuit breaker to the panel (H05) must be closed.
2- The motor and the driven equipment must be uncoupled
Note: for our case” the shear”, the uncoupling is done by:
a- Decoupling the motor shaft & the shear shaft
b- The mechanical brake must be released
3- The lubrication unit, the greasing unit & the hydraulic unit which service the equipment must be run.

2. The procedure of Auto tuning armature current controller is:
1-switch the drive to local mode
2-switch the parameter 99.06 from SERVICE MODE to ARMCUR AUTO
3-there is icon on the drive window program refers to closing the breaker of the shear, this action must
be taken.
4- During the auto tuning the speed of the motor will reach to the base speed.
5-The time of the auto tuning does not exceed 2 seconds
6- If the auto tuning fails A121 AutotuneFail is set, repeat the auto tuning procedure