SIMOREG 6RA70 Siemens DC Master 
Variable Speed DC Drive Features
1 Quad or 4 Quad, 18 ADC and 36 ADC active Field

• Description & Base Drive Catalog Numbers
• Features
• Design and Mode of Operation
  • SIMOREG 6RA70 Converters
  • Parameterization Devices
  • Software Structure
  • Closed-Loop Functions in Armature Circuit
  • Closed-Loop Functions in Field Circuit
  • Optimization Run
  • Monitoring and Diagnosis
  • Functions of Inputs and Outputs
  • Safety Shutdown (E-STOP)
  • Serial Interface

SIMOREG 6RA70 DC Drive Controller complete: (Digital Type)

• Designed to meet the requirements of NEMA, IEEE, NEC, UL Listed and CSA
• 6 Pulse SCR (Silicon Controlled Rectifier) Bridge, 1 quad or 4 quad
• Microprocessor Control Board with 16 bit 38 Mhz high performance multi-tasking microprocessor
• User interface keypad and digital display
• Power and interface control board
• Individual pulse transformers per SCR (comb fire VA rating)
• R/C snubbers across each SCR
• Current transformers for current regulator feedback
• Run/Ready light
• Plug-in wiring harness between boards
• Shunt field excitation circuitry with field current loss protection and field economizing (if required for motor heating, programmable)
• Terminal blocks for incoming/outgoing wiring connections
• High speed AC Silicon SCR rated power fuses
• 115VAC phase non-critical control power transformer
• Power supply transformer
• Digitally fired burst type SCR gate pulses
• 1600PIV rated thyristors are standard
• Built-in A/D converter accepts external reference sources
• Digital and analog tachometer generator feedback or Voltage feedback speed loop selection
• Serial communication via RS232 or RS485 serial ports
• General purpose P-I-D loop for additional regulation modes
• Freely programmable blocks for mathematical functions
• Software programming package to aid in start up
• Peer to Peer Link
• Tachometer to Voltage Feedback switching
• Four layer parameter
• 5 Binary and analog outputs

• Priority access code protection
• Minimum speed
• Maximum speed
• Linear acceleration
• Linear deceleration
• S-Curve rounding
• Jog and thread speed presets
• Current Limit
• Tapered current limit
• IR compensation for voltage feedback drive application
• Motor armature current rating
• Motor field current rating
• Self turning routine automatically adjust each SIMOREG drive controller to optimum performance matching to motor malfunctions
• Motor Over speed
• CEMF crossover voltage (for field weakened speed ranges)

• Overspeed 
• Field current loss
• 12t motor overload
• Instantaneous overcurrent
• Line tolerance monitoring
• Phase sequence monitoring
• Phase loss
• dv/dt Protection on the SCR's
• SCR type high speed AC line fuses
• DC output fuse on regenerative units
• Heat sink thermostat
• Isolated electronics

Diagnostics 
There are more than 120 diagnostic messages for troubleshooting, including fault and warning indication and memory retention of the last four faults. Some of the diagnostics include:

• Line voltage out of tolerance 
• Line frequency unstable/out of tolerance
• Phase loss
• Motor stalled
• SCR failure detection and identification
• Loss of speed of voltage feedback
• Current overload
• EEPROM/Microprocessor
• Quick Stop
• 8 Channel data storage

Standard LCD Display includes:

• Speed reference
• Operating speed
• Current reference
• Actual speed
• Gating angle
• CEMF
• Armature voltage
• CEMF/Speed
• RMS AC phase to phase voltage
• All parameter set points (1-941 as apply)
• Torque direction
• Operating time
• Field current reference/field current actual

Siemens Energy & Automation
SIMOREG DC Master Base Drive Operating Instructions