Before you connect the motors to the sat-nms ACU2-ODU, take care that the circuit breakers for the frequency inverters, motor drivers or conductors are in off position before connecting the motors.

  1. Connect the motors to the sat-nms ACU2-ODU as described in chapter 4.2.3 .

  2. Connect the emergency stop button to its terminals, see chapter 4.2.2 . If you do not have one, take care that these terminals are bridged. Without a connection between these pins the power supply of the motors is disabled.

  3. Press the STOP button on the sat-nms ACU2-ODMs webpage. By this you can be sure that no motor movement will occur by switching on the circuit breakers.

  4. Turn on circuit breakers of the frequency inverters (‘AZ’ and ‘EL’), they have to run now.

  5. Set the motor parameters to the frequency inverters as written in chapter 3.1.1 or 3.1.2 to the desired values. If this is a new installation, frequency inverters are already project specific pre-configured. Please double check, if the settings fit to the data of connected motors.

  6. Check the motor rotating directions, if necessary invert it by interchanging 2 phase-wires of the motor cable. Use a handheld controller or ‘Step Move’ buttons on the sat-nms ACU2-ODMs webpage to initiate movement of desired axis.

  7. If available, turn on POL motor circuit breaker (‘POL’) now and check the rotational direction of the POL Motor. If necessary, change pin 1 and 2 at POL motor terminals to invert the direction. Use a handheld controller or ‘Step Move’ buttons on the sat-nms ACU2-ODMs webpage to initiate movement of desired axis.

  8. Drive the antenna in every direction (AZ, EL and POL) until the limit switches stop the motor movement to ensure that the limit switches work well. ATTENTION! While doing this test it is absolutely necessary to be very mindful to check, if nothing collides! We recommend using a handheld controller for doing this.

  9. Set the soft-limits to the desired values (e.g. 1° before the hardware limit switch is activated).

If you need more detailed informations about the frequency inverters (parameter settings, fault states etc.), please refer to chapter 3.1 Frequency Inverters .