BECKHOFF AX2000 PROFIBUS DP communication profile - Manual (Page 7)

2 Installation / Setup
2.1 Installation
2.1.1 Safety notes
Install and wire up the equipment only while it is not electrically connected. Make sure that
the control cabinet is safely isolated (lock-out, warning signs etc.).
The individual supply voltages will not be switched on until setup is carried out.
Residual charges in the capacitors can still have dangerous levels several minutes after
switching off the supply voltage. Measure the voltage in the intermediate (DC-link) circuit
and wait until it has fallen below 40V.
Power and control connections can still be live, even though the motor is not rotating.
Install the servo amplifier as described in the installation manual. The wiring for the analog
setpoint input and the positioning interface, as shown in the wiring diagram in the
installation manual, is not required.
Never break any of the electrical connections to the servo amplifier while it is live. This
could result in destruction of the electronics.
Electronic equipment is basically not failure-proof. The user is responsible for ensuring that,
in the event of a failure of the servo amplifier, the drive is set to a state that is safe for both
machinery and personnel, for instance with the aid of a mechanical brake.
Drives with servo amplifiers and PROFIBUS expansion cards are remote-controlled
machines. They can start to move at any time without previous warning. Take appropriate
measures to ensure that the operating and service personnel is aware of this danger.
Implement appropriate protective measures to ensure that any unintended start-up of the
machines cannot result in dangerous situations for personnel or machinery. Software
limit-switches are not a substitute for the hardware limit-switches in the machine.
Because of the internal representation of the position-control parameters, the position
controller can only be operated if the final limit speed of the drive does not exceed:
rotatory
at sinusoidal² commutation: 7500 rpm
at trapezoidal commutation: 12000 rpm.
linear
at sinusoidal² commutation: 4 m/s
at trapezoidal commutation: 6.25 m/s
All the data on resolution, step size, positioning accuracy etc. refer to calculatory values.
Non-linearities in the mechanism (backlash, flexing, etc.) are not taken into account.
If the final limit speed of the motor has to be altered, then all the parameters that were
previously entered for position control and motion blocks must be adapted.
PROFIBUS for AX2000/2500 7
BECKHOFF
12/05
Installation / Setup