Commissioning
Instruction manual 91/121 V6.3
8. Follow the paragraph ”Autotune for the synchronization of the transducer“ from page 54, but before enabling the Master
drive with the DEN command, you must also have activated the autotune function on the Slave drive.
9. Always following the above paragraph if everything has been done on a regular basis, you should see both motors rotating
and autotune as indicated. At the end of the procedure, the parameters must be saved on both drives.
10. To calibrate the performance of the motors and the response of the various adjustment loops it is convenient to do the tests on
the Master motor alone; when you have found the ideal parameters you can insert into the Slave drive using the keypad and
LCD display.
11. In order to run the Master motor alone, you need to disable the Slave motor with the ” Slave Running“ menu (see page 48) on
the Master drive display, setting it to “Disabled”.
NOTE:
If the motors have been mechanically disconnected you cannot enable the Slave motor otherwise it could go on speed es -
cape since it does not have a mechanical connection to the Master motor.
12. After deactivating the Slave motor, you can continue following the instructions of paragraph ”Motor speed adjustment“ from
page 54 in order to obtain the desired operation of the Master motor.
13. At this point you must disable the Master motor and copy the modified parameters also to the Slave drive using the LCD dis-
play of the drive.
14. Rehabilitate the Slave motor
with the ”Slave Running“ menu (see page 48) of the Master drive by setting it to “Enabled”.
Save the parameters on the Master and Slave drives.
15. Switch off the switchboard and mechanically reconnect the motors to the machine transmission
16. Turn on the electrical panel and prepare all the equipment for operation. By enabling the Master motor, the Slave motor is
also enabled at the same time (the RUN LEDs of both drives must be switched on).
17. With a zero speed reference, the motors must stand still. If this is not the case, change the ”An.Inp.1 Offset“ parameter (see
page 39) of the Master drive.
18. Move to the parameter ”Contrast Torque“ (see page 48) to adjust the contrast torque of the two motors. Enable the system
and move the motors; change the above parameter until you get a smooth axis movement at all speeds and in both directions.
Generally, a value of 5 to 30 % is sufficient.
19. If the axis has not a smooth motion, you can use the “MASTER 2” mode, which uses a different algorithm.
At the end of all adjustments it is essential to save the parameters before turning off the services.
5.6.9 Motor Overload Function
5.6.9.1 Generality
This function is used to signal that the current absorbed by the motor is greater than the rated current set. The two signals that can be
selected on two digital outputs are:
•
Pre-warning
: the output associated with this signal switches logical status immediately after the rated current is exceeded. It
may be used as a warning to urge the reduction of load on the motor before switching the second signal.
•
Warning
: The output associated with this signal switches logical status after the set time has passed in the parameter ” Over-
load Time“ (see page 49) which starts counting when switching the first signal (“Pre-warning”).
In addition to the above warnings, which may or may not be used, there is the possibility to lock the drive when the “Warning” signal-
ing occurs by sending it to Fault and signaling an alarm on the display (“Motor Overload” page 74) or to automatically reduce the cur-
rent limit so as to bring back the current absorbed by the motor within the nominal value.
5.6.9.2 Calibration
To use this function to report on two outputs the states indicated in the previous paragraph follow these points:
1. Decide which of the 4 digital outputs should be used for “Prewarning” signalling.
2. Move to the configuration menu of that output and select as source the parameter "MotOvl PreWarn" using the ”Dig.Op. X
3. Decide which of the 4 digital outputs should be used to signal “Warning”.
4. Move to the configuration menu of that output and select as source the parameter "MotOvl Warning" using the ”Dig.Op. X
5. Set the parameter ”Overload Time“ (see page 49) with the desired time that you want to overload the motor before generat-
ing the condition of “Warning” which involves signalling on the digital output (if activated) and/or blocking the drive with
alarm and/or automatic current limitation.
From this moment the selected outputs indicate the condition of overload on the motor; it is the responsibility of the user to decide
what to do when these reports occur.
NOTE:
It is not mandatory to use these reports on digital outputs: you can select only one or none. They only serve to communic-
ate externally (PLC or CNC) the overload condition.
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Alter Elettronica s.r.l.
