DA98D User Manual
47
Chapter Seven Operation by Switching on Power
z The drive unit and motor must have reliable ground contact; PE terminal must be safely
connected with the grounding terminal of equipment.
z It is recommended that the power should be supplied through isolating transformer and
power filter for the purpose of ensuring safety and anti-jamming abilities.
z Only after examining and confirming that the wire is connected correctly can the power be
switched on.
z An emergency stop circuit must be coupled in to ensure that the power can be immediately
cut off in case of failure (see Fig. 7.1).
z After the alarm for failure in drivin unit occurs, confirm that the trouble has been shot and that
the SON signal is invalid before restarting the system.
z Do not touch the drive unit and motor at least 5 minutes after the power is off for fear of
electric shock.
z After some time of operation, the drive unit and motor may have a relatively high
temperature. Be careful not be burned.
7.1 Power Supply Connecting
Refer to Fig. 7.1 for power supply connecting and connect the power supply according to the
following order:
1) Connect the power supply with input terminal of main circuit power (the three phases are
connected with R, S and T; and the single phase is connected with R and S) through
electromagnetic contactor.
2) Power supply r and t in the control circuit shall be connected at the same time with or prior
to main circuit power. If only the control power is connected, the servo ready signal (SRDY)
will be OFF.
3) After the main circuit power is connected, the servo ready signal (SDRY) will be ON with a
time delay of 1.5 seconds, then the servo on signal (SON) can be received. After detecting
validity of the servo on signal, the driver output will be valid, and the motor will be activated
and under the operation state; when detecting invalidity of the servo on signal or alarm, the
base electrode circuit will be closed and the motor will be under free state.
4) When servo on is connected with the power supply, the base electrode circuit will be
connected after 1.5 seconds or so.
5) A frequent connection of the cut-off circuit may damage the soft start circuit and consume
energy of the brake circuit. The connection frequency shall be best limited to less than 5
times per hours and 30 times per day. After the trouble for overheating in the drive unit or
motor has been shot, the power can only be switched on after 30 minutes of cooling down.
Attention
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