AMCI SD4840EK, Руководство пользователя

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C
ONFIGURATION
D
ATA
F
ORMAT
SD4840EK User Manual
ADVANCED MICRO CONTROLS INC.
58
Current Loop Gain (continued)
Determining Current Loop Gain (optional)
Determining the current loop gain setting require the following system setup:

Stable line voltage at the correct level. (Don’t determine the setting at 24 Vdc when the drive will oper-
ate at 48 Vdc.)

Motor current set to the operating level. (Don’t determine the setting with a motor current of 2 amps if
the motor will operate at 3 amps in the production environment.)

Idle current reduction set to 100%, which means no reduction. (This setting should be used regardless
of the setting used in the production environment.)

An acoustically quiet environment. (You will be listening for quiet changes in the sound of the motor
when it is idle.)
1) Write a Current Loop Gain value of 5 to the SD4840EK.
2) Enable the SD4840EK and listen for a sound from the motor. It will subjectively sound like an AM radio
static.
3) If you don’t hear the radio static sound from the motor, repeat steps 1 and 2 with an increased Current Loop
Gain.
4) Once you hear the radio static sound from the motor, decrease the Current Loop Gain setting by 10% to
20%. The goal is to eliminate the sound from the motor.
Refer to the documentation for your programming software to learn how to set the Current
Loop Gain using the CoE registers and how to make the changes permanent. You can refer to
step 3.2.3,
Configure the SD4840EK
on page 96 of this manual for brief instructions when
using the TwinCAT software.
Notes on Other Configuration Words

Changes to the Idle Current only take effect at
the end of the first move after re-configuration.

The motor current can be set to any value within its range.
Invalid Configurations
The following configurations are invalid:
1) Setting any of the reserved bits in the configuration words.
2) Setting any parameter to a value outside of its valid range.
3) Configuring two or more inputs to have the same function, such as two CW Limit Switches. (An
error does not occur if two or more are configured as General Purpose Inputs.)
4) Setting the Input Configuration bits for any input to “111”. See table R5.2 on page 54 for more
information.
5) Using an encoder and not setting the Encoder_Resolution register (8010:06) to a valid value.
6) Setting the Stall Detection Enable Bit without configuring the SD4840EK to use the encoder.
7) Setting the Home to Encoder Z-Pulse Bit without configuring the SD4840EK to use the encoder.