ABB-DCS800-Drives (20 to 5200 A)

ABB-DCS800-Drives (20 to 5200 A)

if a pulse encoder is used make sure that pulse encoder's auxiliary voltage  connection corresponds to its voltage and that the channel connection  corresponds to correct direction of rotation,   check that the shielding of the pulse encoder's cable is connected to the TE  bar of the DCS800.   if an analog tacho is used make sure that it is connected to the proper  voltage input at the SDCS-CON-4:  X3:1 - X3:4 (90 - 270 V)  X3:2 - X3:4 (30 - 90 V)  X3:3 - X3:4 (8 - 30 V)   for all other cables make sure that both ends of the cables are connected  and they do not cause any damage or danger when power is being  switched on  Measuring the insulation resistance of the motor cables and the motor:   isolate the motor cables from the drive before testing the insulation  resistance or voltage withstand of the cables or the motor,

Instructions how to measure the insulation resistance   measure the insulation resistance between:  1. + cables and PE,  2. - cables and PE,  3. armature cables and field cables,  4. field - cable and PE,  5. field + cable and PE,   the result should be Ms  Setting of Jumpers:  The boards of the DCS800 include jumpers to adapt the boards to different  applications. The position of the jumpers must be checked before connecting  voltage. For specific jumper settings consult the DCS800 Hardware Manual.

Drive data  Check following items for each drive and mark the differences in the delivery  documents:   motor, analog tacho or pulse encoder and cooling fan rating plates data,   direction of motor rotation,   maximum and minimum speed and if fixed speeds are used,   speed scaling factors:  e.g. gear ratio, roll diameter,   acceleration and deceleration times,   operating modes:  e.g. stop mode, E-stop mode,   the amount of motors connected  Checking with the power switched on  There is dangerous voltage inside the cabinet!  Switching the power on:   prior to connecting the voltage proceed as follows:  1. ensure that all the cable connections are checked and that the  connections can't cause any danger,  2. close all doors of enclosed converter before switching power on,  3. be ready to trip the supply transformer if anything abnormal occurs,  4. switch the power on  Measurements made with power on:   check the operation of the auxiliary equipment,   check the circuits for external interfaces on site:  1. E-stop circuit,  2. remote control of the main breaker,  3. signals connected to the control system,  4. other signals which remain to be checked  Connecting voltage to the drive:   check from the delivery diagrams the type of boards and converters which  are used in the system,   check all time relay and breaker settings,   close the supply disconnecting device (check the connection from the  delivery diagrams),   close all protection switches one at a time and measure for proper voltage

Toggle between speed- and torque control  In some application, both speed- and torque control of the followers are required,  e.g. if it is necessary to accelerate all drives along the same speed ramp up to a  certain speed before the torque control can be started. In those cases, a flying  switch over between speed- and torque controls is required. The switch over can  be done by e.g. the overriding control using TorqSel (26.01). See also TorqMux  (26.05) and TorqMuxMode (26.04). Follower diagnostics  All the followers receive the torque reference via TorqRefA (25.01). All followers  are able to detect communication breaks, after the first valid message is received.  The action due to a communication break is defined by Ch2 TimeOut (70.14) and  Ch2 ComLossCtrl (70.15). Feedback for all alarms and faults from the followers  must be handled by the overriding control through the Ch0 on the SDCS-COM-8  board.  Master-follower link specification  Size of the link: One master and maximum ten followers are allowed. If more than  ten followers are required, a local ABB agent should be consulted.  Configuration: Link is configurable by the overriding control using Ch2  MaFoMode (70.09). This makes possible to change between master and follower  by the overriding control without changes in the hardware.  Transmission rate: 4 Mbit/s  Total performance of the link: 2 ms (between master and followers)  Protocol: Distributed Drives Communication System, DDCS