TS
−
I Special servo drive for hybrid electro-hydraulic system of injection molding machine User Manual
Chapter 6 Debugging, selection and function application
61
V. Why does the motor not rotate?
A:
5.1 Why the motor does not run when the pressure and flow commands are issued?
(1) Check if the P0.06 operation instruction functions properly, if P0.06=1, then the terminal is
working, please check the X terminal’s multiple function selection and if the said terminal is closed
properly.
(2) If there is any alarm.
(3
）
If there is alarm, disconnect the servo enable signal before you remove the alarm.
(4) When E.dL1 appears, please turn off the power and reset, otherwise the encoder pulse signal
can hardly be accurate, making the operating current too big, and the motor does not run.
5.2 Why the driver does not receive the pressure and flow commands?
Check the reference pressure and flow signal (dc0
～
10V) of AI1 and AI3, and the motor will nor run
if one of them is 0.
（
1
）
With the DC voltage profile table,check the voltage of computer terminals to ground, and the
voltage of AI1 and AI3 to GND meet the requirements;
（
2
）
Check if the PLC controller and the driver control terminals are wired properly.
（
3
）
Check if the Pressure Signal and Flow Signal are current type signals, if so, use the I to V
conversion board;
（
4
）
Check if the voltage of AI1 and AI3 to GND exceed 10V, if so, adjust it.
5.3 Feedback signal error of pressure sensor
Check the actual pressure displayed by driver, and check the voltage of AI2 to GND, and judge if
error occurs, and the motor will not run if this is true.
（
1
）
Check the output signal and measure range of the pressure sensor and check if P1.01 and
P1.02 are correctly set.
（
2
）
Use a multi meter to measure if the power supply voltage of the pressure sensor is normal.
（
3
）
Use a multi meter to check if the pressure calculated from the feedback signal of the pressure
sensor corresponds to the actual pressure (check the pressure meter, and note that this meter must
be a good one).
5.4 UVW Open Circuit
Check if the UVW wirings from the drivers to the motor are broken or not. If broken, the motor will
not run.
(1) When you check the driver, if the current is almost 0, then UVW open circuit is highly possible.
(2) Use a multimeter to check if the resistances of the motor's U, V and W branches are aligned to
the motor's parameters, in case a big resistance is found, then the motor's inner coil must be broken.
VI. Motor runs, but system pressure cannot be increased
A:
（
1
）
Pressure oil goes back to oil tank through other bypass;
A:
（
2
）
System safety valve has leakage or is damaged;
A:
（
3
）
Hydraulic oil in oil tank is insufficient;
A:
（
4
）
oil pump runs reversely;
A:
（
5
）
Error occurs in the connection between the motor and oil pump.
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