ABB DCS800 Firmware Manual

DCS800 Firmware manual supplement for North America (rev. 2.60, 2.70) Rev. b 5/30/2008
10
EMF feedback with dynamic braking
If using EMF feedback with dynamic braking (meaning parameter M1SpeedFbSel (50.03) is
set to EMF and one or more of the above parameters is set to DynBraking), you will also
need to set up the DynBrakeDly (50.11) parameter. This is necessary, because, when
using a DC contactor with EMF feedback, when the contactor opens to dynamically brake,
there is no valid information about the motor speed and thus no zero speed information in
the drive. To prevent an interlocking of the drive after dynamic braking, the speed is
assumed to be zero after DynBrakeDly (50.11) time is elapsed. When dynamically braking,
the zero speed output will be set after this time expires.
The following parameter must be set:
• Parameter DynBrakeDly (50.11) = the time (seconds) it normally takes the
motor to stop during dynamic braking
For additional information
See the DCS800 firmware manual:
• Page 120 group 6 parameters Drive Logic Signals
• Page 168 group 14 parameters Digital Outputs
• Pages 180 – 181 group 21 parameters Start / Stop
• Pages 205 - 207 group 30 parameters Fault Functions
AC contactors
_________________________________________________________
The drive’s DO-8 output can control an AC input contactor instead. For an AC contactor,
use these settings:
• Parameter DO8Index (14.15) = 603 (default)
• Parameter DO8BitNo (14.16) = 7 (default)
• Parameter MainContCtrlMode (21.16) = On (default)
• Parameter MainContAck (10.21) = the acknowledge input number, if
present.*
*
As an alternative to using parameter (10.21), the contactor acknowledge signal (from an
auxiliary contact on the AC input contactor) can be used to set the “StartStop” input. This
would permit the motor to be turned on and commanded to move by setting just one input,
the OnOff input. When OnOff is set, the drive will set DO-8 which will close the AC
contactor. The auxiliary contact will then give the StartStop input, initiating motion. If this is
desired, use the following parameter instead of 10.21:
• Parameter StartStop (10.16) = the acknowledge input number

ABB DCS800 Specifications

General

Control Type	Digital
Supply Voltage	380 ... 690 V AC
Input Voltage Range	380 V to 690 V AC
Control Mode	Torque, Speed
Cooling Method	Air-cooled
Communication Protocols	Modbus, Profibus, CANopen
Communication Options	Ethernet
Protection Class	IP21, IP54
Enclosure Rating	IP00, IP21, IP54
Protection	Overcurrent, Overvoltage, Overtemperature
Ambient Temperature	0 to 40°C
Field Supply	Integrated or External