Installation and Commissioning

Fault tracing guide1.11 Disk DriveThe disk drive is controlled by the I/O computer via a flat cable. The power is supplied bya separate cable.Common types of error are read and write errors, generally caused by faulty diskettes. Inthe event of a read and/or write error, format a new, high quality diskette in the robot andcheck to see whether the error disappears. If the error is still present, the disk drive willprobably have to be replaced. However, check the flat cable first.NB: Never use diskettes without a manufacturer’s mark. Unmarked, cheap diskettes can beof very poor quality.If the disk drive is completely dead, check the supply voltage connection to the disk driveto see that it is +5 V, before replacing the drive.Measuring points are available on the backplane: X9 Maintenance plug, see chapter 9.When replacing the disk drive, check that the strapping is set correctly on the unit. Comparewith the faulty drive being replaced.1.12 FusesThere is one automatic three-phase 20 A fuse that supplies the DC-link in the MOTORSON state, on the transformer. There is also a automatic three-phase 10 A fuse that suppliesthe power supply unit. There are also two fuses for customer AC supplies, one 3.15 A andone 6.3 A.The backplane has four PTC resistance fuses:- Serial measurement board 1- Serial measurement board 2- CAN2, manipulator I/O- CAN3, external I/OThe fuses protect against 24 V short-circuits and return to the normal state when there is nolonger a risk of short-circuiting.The panel unit has one PTC fuse to protect the motor on chains. An open fuse is indicatedon the teach pendant, see Status of the Panel unit, inputs and outputs, displayed on the teachpendant side 6, 24 panel.The cabling from customer 24 V supply is protected by a 2A fuse on terminal XT31 in theupper compartment of the controller.Note that the power supply unit DSQC 374 is provided with a short circuit energy limitationwhich makes the fuse unnecessary.Product Manual 11