630.x DC voltage too low
Description
Before the servo amplifier is switched on, monitoring has checked the DC bus (link) and has determined that the voltage is too low.
The minimum DC bus voltage must be 447 volts or (from Acopos version 4.0-1a6), 412 volts.
Remedy
- Insufficient contact from ACOPOS to the backplate. Tighten screw below flap.
- If the backplate is supplied through an expansion module, check the intermediate circuit fuse.
- If the DC link is provided by a PULSAR, check intermediate circuit fuses in the PULSAR.
It is vital to ensure when changing the fuses that all assemblies (including external feeds, e.g. Pulsar) are discharged (0V). If this is not done, the fuse can be immediately destroyed by charge balancing (high currents between capacitors).
A defective fuse does not differ visually from an intact one. A reliable statement about the state of the safety element is given only by a continuity check (e.g. ohmmeter).
The intermediate circuit can be measured directly on the backplate. The voltage must be between 500 and 750V (U+ to U-) or the half against the conductor bar with ground potential.