SmartFan®Stratus II
ISOLATED VOLTAGE CONTROL MODE
Stratus II Variable Frequency Drive AC Motor Speed ControlOperation/Installation Manual
Isolated Voltage Control Mode: Connection for the isolated voltage control mode is made on the Isolated I/O terminals using the COM pin for ground reference and either the 0–5 or 0–10 pins for the positive reference.
Set registers 40001 and 40017 to 129 (0×0081) for forward run isolated voltage control mode.
Set register 40014 to desired ramp up rate (1Hz/Sec)
Set register 40015 to desired ramp down rate (1Hz/Sec)
Set register 40030 to 1 to save to EEPROM.
The Isolated Voltage Control mode is split into the following three control modes:
- Positive Slope
- Negative Slope
- Two Speed
Positive Slope:
Set register 40019 to the maximum output that the motor should receive (1Hz resolution) Point A
Set register 40020 to the minimum output that the motor should receive (1Hz resolution) Point B
Set register 40022 to the control value where the maximum output will occur (0-100%) Point E
Set register 40023 to the control value where the minimum output will occur (0-100%) Point D
Set register 40024 to the control value where the alarm condition will occur (0-100%) Point C
- To disable alarm set to 0%
- To Idle when in alarm set bit 4 in Register 40013
- To alarm on over limit set bit 6 in Register 40013

Negative Slope:
Set register 40019 to the maximum output that the motor should receive (1Hz resolution) Point A
Set register 40020 to the minimum output that the motor should receive (1Hz resolution) Point B
Set register 40022 to the control value where the maximum output will occur (0-100%) Point D
Set register 40023 to the control value where the minimum output will occur (0-100%) Point E
Set register 40024 to the control value where the alarm condition will occur (0-100%) Point C
- To disable alarm set to 0%
- To Idle when in alarm set bit 4 in Register 40013
- To alarm on over limit set bit 6 in Register 40013

Two Speed:
Set register 40019 to the maximum output that the motor should receive (1Hz resolution) Point A
Set register 40020 to the minimum output that the motor should receive (1Hz resolution) Point B
Set register 40022 to the control value where the speed change will occur (0-100%) Point D
Set register 40023 to the same value as register 40022
Set register 40024 to the control value where the alarm condition will occur (0-100%) Point C
- To disable alarm set to 0%
- To Idle when in alarm set bit 4 in Register 40013
- To alarm on over limit set bit 6 in Register 40013

Stratus II Variable Frequency Drive AC Motor Speed Control Manual PagesOperation/Installation Manual
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