Datasheet

USB communication
SIM23xx Motor Controller Datasheet 9
USB communication
Use USB only for configuration, monitoring and troubleshooting. USB is not a reliable communication method
when used in an electrically noisy environment. Further, communication will not always recover after it is
lost without unplugging and replugging the connector, or restarting the controller. RS232 is the preferred
communication method when interfacing with a computer. USB and CAN can operate at the same time on the
SIM2360. Connecting to a computer using USB will not disable the CAN interface.
RS485 Communication
The SIM23xx has a half-duplex RS485 interface. Two signals are present on the 25-pin DSub connector for
connecting to RS485 networks. Connecting these two wires with the correct polarity is all that is needed to
establish a connection. The RS485+ is the positive signal and RS485 – is the inverted signal. Once enabled, the
RS485 can be used to communicate data under the Modbus protocol, or Roboteq’s native serial commands.
Status LEDs and Flashing Patterns
The controller is equipped with three LEDs. A Green Power LED, a Red/Green Status LED, and a Yellow
Communication LED. After the controller is powered on, the Power LED will tun on, indicating that the
controller is On. The Status LED will be flashing at a two second interval. The flashing patterns and colors
provide operating or exception status information.
Idle - Waiting for Command
RS232/USB Mode
RC Pulse Mode
Analog Mode
FIGURE 8. Normal Operation Flashing Patterns
Short Detected
Overheat
Under or Over V
oltage
Power Stage Off
FIGURE 9. Exception or Fault Flashing Patterns
Additional status information may be obtained by monitoring the controller with the PC utility.
The communication LED gives status information on the CAN and USB.