SmartFan®Stratus II
MODBUS & DEFINITIONS
Stratus II Variable Frequency Drive AC Motor Speed ControlOperation/Installation Manual
Isolated Modbus Control Mode: Using an RS-485 2-wire Modbus communications link, Stratus II can control motor speed, acceleration, deceleration and direction.
Modbus RTU Protocol
Baud Rate: Settable (default is 9600)
Word Length: 8
Parity: None
Stop Bits: 1
MODBUS ID: 1-63
Setup for Modbus Control:Use switch SW2 to select a unique ID number between 1 and 63 on your Modbus network. To set an ID number, turn #7 OFF and turn ON any number of switches 1-6 on SW2 and add up their associated “Value” see chart below. Example: turning ON “2, 4 and 6” would set the ID number by 2+8+32=42.
Connecting to a Modbus Network:Use an RS-485 2-wire twisted pair cable, connected to the Modbus network (refer to wiring diagram for proper pin out).
Register Definitions:
40001 – Run Control: Enter the desired control method. Only one control method may be selected at a time. Drive will use the 1st control bit set.
40002 – Target Frequency: Set the desired output frequency when in Modbus mode. In all other modes it is read only and displays target output frequency.
40003 – Target Speed: Set the desired output % when in Modbus mode. In all other modes it is read only and displays target output percentage.
40004 – Output Frequency: Displays the current output of the drive in Hertz.
40005 – Output Speed: Displays the current output of the drive in %.
40006 – Control value: Displays a representation of the analog control in % full or Temp °C.
40007 – Alarms: Displays all active alarms. See table 4.
40008 – Bus Voltage: Displays the DC bus voltage in Volts. (1V res)
40009 – Bus Current: Displays the DC bus current in Amps. (0.1A res)
40010 – Temperature: Displays the temperature of the inverter module in °C. (1°C res). 100°C shutdown.
40011 – Revision: Displays the firmware revision.
40012 – Modbus ID: Displays the Modbus ID.
40013 – Configuration: Used to configure specific control preferences.
40014 – Ramp Up Rate: Enter the desired increase in output frequency rate. (1Hz/sec res)
40015 – Ramp Down Rate: Enter the desired decrease in output frequency rate. (1Hz/sec res)
40016 – Current Limit: Enter the desired output current fault level (0-100) (.1A res). Any current beyond this setting will cause Stratus II to lock-up and set an alarm. Power must be cycled to clear the alarm.
40017 – Startup Run: Enter the configuration to be loaded into Register 40001(Run Control) at startup.
40018 – Startup Frequency: Enter the desired frequency output at startup. Modbus control only.
40019 – Max Frequency Output: Enter the desired maximum frequency output when in analog control modes.
40020 – Idle Frequency Output: Enter the desired Idle frequency output when in analog control modes.
40021 – Contact Closure Frequency: Enter the desired output frequency when CC is activated. Non-Isolated digital control.
40022 – Max Control %: Used in 0-5V, 0-10V, 4-20mA, and Pot control. It sets the analog control percentage point of where the Max Frequency output occurs.
40023 – Idle Control: The Idle control register is used in 0-5V, 0-10V, 4-20mA, and Pot control. It sets the Idle frequency control percentage. Refer to 40013.
40024 – Alarm Control: The alarm control register is used in 0-5V, 0-10V, 4-20mA, and Pot control. It sets the alarm control percentage. 0=Disabled. Refer to 40013.
40025 – Max Temperature: The max temperature register is used in Thermistor control. It sets the Temperature threshold for max frequency output. Refer to 40019 for setting Max Freq output value.
40026 – Idle Temperature: Used in thermistor control mode to set the temperature threshold for idle frequency. Refer to register 40020 for setting Idle Freq value.
40027 – Alarm Temperature: Used in thermistor control mode to set the temperature threshold for an alarm.
40028 – Baud Rate: Sets the Modbus communication Baud rate. Range from 2,400 – 500,000 (100 Baud Res). *Recovery: Setting SW2 for ID 0 will set Baud to 9600.
40029 – PWM Frequency: Sets the sine wave modulation frequency. Range from 2,000 – 20,000 Hz. Default = 16,000Hz
40030 – EEPROM Save: Setting this register to a 1 saves the control variables into EEPROM. EEPROM Save is also used to set variables to default.
Stratus II Variable Frequency Drive AC Motor Speed Control Manual PagesOperation/Installation Manual
Use the links below for addtional manual pages or for a complete manual or click on the Operation/Installation Manual PDF link above.
