Autotune - Emerson E300 Series Design Manual

Safety Product Mechanical
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Table 7-2 Motor parameters
Parameter
Motor Rated Current (B02)
Motor Rated Voltage (B03)
Motor Rated Power Factor (B04)
Motor Number Of Poles (B05)
Motor Rated Frequency (B06)
Motor Rated Speed (B07)
Symmetrical Current Limit (B16)
Reverse Motor Phase Sequence (B26)
Should the motor rotate in the incorrect direction due to the system wiring Reverse Motor Phase Sequence (B26), this can be used to invert the
direction.
Table 7-3 Encoder parameters
Parameter
Drive Encoder Type (C01)
Drive Encoder Auto Configuration Select (C02)
Drive Encoder Rotary Pulses Per Revolution (C03)
Drive Encoder Voltage Select (C04)
Drive Encoder Feedback Reverse (C12)
Setting the encoder power supply voltage too high for the encoder connected to the drive could result in damage to the feedback device. Only
increase the encoder power supply voltage setting for suitable encoders connected to the drive.
CAUTION
Should the encoder increment in the wrong direction, Drive Encoder Feedback Reverse (C12) can be used to invert the direction of rotation. If there
is motor acoustic noise during operation following the autotune, refer to section 10.3 Motor acoustic noise on page 475.
7.3

Autotune

Prior to an autotune being carried out, the motor nameplate data must be set-up and for RFC-A, RFC-S operation with a position feedback device the
position feedback parameters must be set-up. There are two possible autotunes available, these being a static autotune and a rotating autotune as
described here.
Both the static and rotating autotunes are available for Open loop or RFC-A, RFC-S operating modes. The static autotune will measure motor
parameters to provide good control, and the rotating autotune will measure motor parameters to provide a higher level of control. Only the rotating
autotune will check the position feedback device connected to the drive. Refer to A26 (Motor Autotune B11) used to select the required autotune,
None (0) Static (1) Rotating (2).
7.3.1 Static Autotune
A26 (Motor Autotune B11) = Static autotune (1). The following describes how an autotune test can be initiated and normal operation resumed
following successful completion of the test:
NOTE
The static autotune is carried out with the output motor contactors closed as the motor is energized, the motor brake remains fully closed during the
complete autotune test. The control over the output motor contactors and the brake during the static autotune must be made manually.
1. The static autotune test cannot be initiated if the drive is tripped Drive OK (L05) = Off (0) or the drive is active Drive Active (L06) = On (1). The
drive can be disabled by removing the drive enable signal from control terminal 31.
2. A static autotune test is initiated by setting A26 (Motor Autotune B11) to Static autotune (1)
3. The output motor contactors should be manually closed by an authorised person who is familiar with the requirements for safety, this sequence
also applies the drive enable signal on control terminal 31.
4. A drive run signal should be applied.
5. The static autotune will commence.
6. If the autotune sequence is completed successfully the drive enable is set to inactive (Inhibit) and A26 (Motor Autotune B11) is set to zero.
7. The output motor contactors can be opened.
8. The drive enable will only be set active again by firstly opening the output motor contactors and removing the drive enable.
9. If a trip occurs during the autotune sequence, the drive will go into the trip state and A26 (Motor Autotune B11) is set to zero. As above, the drive
enable must be removed and re-applied before the drive can be restarted after the trip has been reset. Care should be taken if the autotune
was not completed as the drive parameters that should have been measured and set-up will still have their original values.
The following describes the effects of the autotune test on drive parameters:
1. The static autotune relies on the motor being stationary when the test is initiated to give accurate results.
2. Parameters associated with the motor and feedback (position feedback phase angle), are updated following successful completion of the
autotune test.
E300 Design Guide
Issue Number: 1
Electrical Getting
User Menu A
installation started
Mode
Open loop, RFC-A, RFC-S
Open loop
Open loop, RFC-A, RFC-S
RFC-A, RFC-S
Advanced
Commissioning Diagnostics Optimization CT MODBUS RTU Technical Data
Parameters
Detail
Motor nameplate data
Can be derived from rotating autotune
Open loop and RFC-A mode select automatic if unknown
Motor nameplate data
For Open loop, RFC-A control ensure correct slip speed
refer to parameter A16 (Slip Compensation Enable B10)
Maximum operating current limit to protect motor.
Parameter to rotate motor output phase rotation.
Mode
Encoder nameplate
Can only be used with encoders with comms
Encoder nameplate data / auto configuration
Encoder nameplate data
Parameter to rotate encoder feedback position
Detail
151