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SmartFan® Stratus Manual
MODBUS Control Mode
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Unless otherwise specified, Stratus P/Ns 240F400 and 240F400E are factory set to control fans in the Temperature Control mode. To control via voltage, current source or remote transducer make sure SW3 DIP switches 1-8 are set to OFF, set SW2 DIP switches as shown below, then refer to the control mode section you have selected to customize the Stratus for your application.
| Table 2: Setting Control Modes via Switch SW2 |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
| MODBUS |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
| Voltage |
ON |
ON |
OFF |
OFF |
OFF |
OFF |
OFF |
OFF |
| Current |
ON |
ON |
ON |
ON |
OFF |
ON |
OFF |
ON |
| Temperature |
ON |
ON |
OFF |
OFF |
ON |
OFF |
ON |
OFF |
| Transducer |
Contact CRI Customer Service |
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| USING SINGLE-PHASE OR THREE PHASE MOTORS (switch SW1: #8) |
| The Stratus can control single or three-phase motors from a single-phase power source. To control a single-phase motor, set SW1, #8 to the OFF position, to control a three-phase motor, set SW1, #8 to the ON position.
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USING MODBUS CONTROL MODE |
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Unless otherwise specified, Stratus P/Ns 240F402 and 240F402E can only be used in MODBUS control mode. Using a MODBUS communications link, the Stratus can control motor speed, acceleration, deceleration and direction. The protocol required to use MODBUS with the Stratus is listed below:
MODBUS RTU Protocol:
Baud Rate: 9600
Word Length: 8
Parity: None
Stop Bits: 1
MODBUS ID: 1-255
Setup for MODBUS Control
Use switch SW3 to select a unique ID number between 1 and 255 on your MODBUS network. To set an ID number, turn ON any number of switches 1-8 on SW3 and add up their associated Value see chart below. Example: turning ON switches 2, 5 and 7 would give a unique ID number of 2+16+64=82.
| Table 6: SW3 Switch Settings |
| Switch # |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
| Value |
1 |
2 |
4 |
8 |
16 |
32 |
64 |
128 |
Connecting to a MODBUS Network
Use an RS-485 2 wire twisted pair cable, connected to the MODBUS network (see figure 5 for proper pinout). Note: when connecting several MODBUS controllable units in a daisy chain fashion, sever pin 7 (18VDC) connection or contact customer service about supplying units with no voltage on pin 7. See figure 5.
Controlling via MODBUS
Use table 7 as a quick reference when controlling using MODBUS. Only the shaded registers are required to get a motor turning, for detailed information concerning all registers, see definitions below.
| Table 7: Stratus MODBUS Memory Map |
| Register |
Description |
Valid Entry |
| 40001 |
Motor Direction |
0,1,3 |
| 40002 |
Set Speed (% of full) |
0-100 |
| 40003 |
Set Frequency (Hz) |
0-400 |
| 40004 |
Ramp Up Rate (Hz/sec) |
0-60 |
| 40005 |
Ramp Down Rate (hz/sec) |
0,1,3 |
| 40006 |
Current Trip Limit (Amps) |
0-100 |
| 40008 |
Current Output Frequency |
0-60 |
| 40009 |
STATUS Flags |
0,1,3 |
| 40010 |
Default Startup Speed (% of full) |
0-100 |
| 40011 |
Revision (2 bytes) |
0-100 |
| 40013 |
Motor Phase |
0,1,3 |
| 40014 |
Bit 0: Default Start/Stop |
0-100 |
| 40016 |
Max. Motor Frequency (Hz) |
0-400 |
| 40017 |
Number of Good Packets |
0-60 |
| 40018 |
Number of Bad Packets |
0,1,3 |
| 40019 |
DC Bus Voltage |
0-100 |
| 40020 |
Motor Current (100 = 10 Amps) |
0-400 |
| 40021 |
IGBT Temp. (raw value) |
0-60 |
40001 Motor Direction:
0=Stop, 1=Forward, 3= Reverse
40002 Set Speed (% of full): Use this register to set motor speed as a percentage of full speed, 0-100% in 1% increments.
40003 Set Frequency (Hz): Use this register to set the desired output frequency in 1Hz increments from 0-400Hz, this will also adjust the speed. Use register 40016 to limit the maximum frequency for your motor.
40004 Ramp Up Rate (Hz/sec): Use this register to set the desired output ramp up rate in 1Hz/sec. Increments.
40005 Ramp Down Rate (Hz/sec): Use this register to set the desired output ramp down rate in 1Hz/sec. Increments.
40006 (disabled for Rev:1 assemblies, contact customer service for details) Programmable Current Trip Limit (Amps): Use this register to set the desired output current trip point in 0.1Amp increments. The unit will fault (output will shut off, LED D11 turns RED) when the entered value is reached.
40008 Current Output Frequency: This register displays the frequency in (Hz) regulating the motor.
40009 Status Flags:
Bit 0 Run/Stop
Bit 1 Actual direction
Bit 2 Programmable current trip (also displayed on D11)
Bit 3 Hardware current trip (also displayed on D11)
Bit 4 Over temperature trip (also displayed on D11)
Bit 5 Unused
Bit 6 MODBUS enabled
Bit 7 Timer tick
40010 Default Startup Speed (% of full): The value in this register is copied to 40002 at power-up.
40011 Revision (2 bytes): Displays current firmware Revision of IC1 in 2 Bytes.
40013 Motor Phase:
1 = 1 Phase, 3 = 3 Phase
40014 Bit 0 : Default Start/Stop: The value in this register is copied to 40001 at power-up.
40016 Max. Motor Frequency: Limits the frequency supplied to the motor. Set this value to the maximum frequency of the motor being controlled (from 0-400Hz) before setting 40003 to avoid inadvertent damage to the motor.
40017 Number of Good Packets: Displays the number of completed MODBUS transmissions.
40018 Number of Bad Packets: Displays the number of incomplete MODBUS transmissions.
40019 DC Bus Voltage: Voltage reading displayed in 40019 is a raw value. DC Voltage can be determined using the following formula: CountsValue/2.236 = DC Bus Volts.
40020 Motor Current (100 = 10A): Displays the current draw of the motor being powered.
40021 (disabled for Rev:1 assemblies, contact customer service for details) IGBT Temp (raw value): The junction temperature of the Stratus Power Module (IC2) in raw form. To convert the value to CΊ = (Value x (-.137)) + 152. This value should always be less than 379(100CΊ). The unit will fault (output will shut off, LED D11 turns RED) when 379(100CΊ) is reached.
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Use the links below for addtional manual pages or for a complete manual (8 pages), click on the Operation/Installation Manual PDF link above.
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