Johnson Controls VS3 Series User Manual

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Appendix A—Description of parameters
VARIABLE SPEED DRIVE SERIES III LIT-12012999—June 2018 www.johnsoncontrols.com
Code Modbus ID Parameter Application RO/RW
P4.1.14 249 Accel Time 2 1,2,3 RW
Use this parameter to set the time required for the output frequency to accelerate from the zero
frequency to the set maximum frequency. These parameters provide the possibility to set two different
acceleration/deceleration time sets for one application. The active set can be selected with the
programmable digital input.
P4.1.15 250 Decel Time 2 1,2,3 RW
Use this parameter to set the time required for the output frequency to accelerate from the zero
frequency to the set maximum frequency . These parameters provide the possibility to set two different
acceleration/deceleration time sets for one application. The active set can be selected with the
programmable digital input.
P4.1.16 267 Power Loss Function 1,2,3 RW
Use this parameter to enable or disablethe power loss ride thru funciton. When enabled the drive will
stop the output voltage to the motor allowing motor to coast down but PWM active to feed power back
into drive to keep the drive powered up as long as it can before power is lost. The drive will accept
restart and safely control the motor in the time set without cycling the run command if input voltage
returns. This mode is engaged at the following levels - 230V - 156.8Vdc, 480V - 303Vdc, and
575 - 426.65Vdc.
1 = Enable power loss function
0 = Disable power loss function
P4.1.17 268 Power Loss Time 1,2,3 RW
Use this parameter to set the allowable power loss max time before the drive will not auto restart when
power is reestablished and run command active. If AC input voltage recovers before this time expires,
drive shall continue to operate.
P4.1.18 2444 2
nd
Stage Ramp Frequency 1,2,3 RW
Use this parameter to define the frequency level where the drive enables the 2
th
Stage Ramp Frequency
output function. This then can be used for other inputs or devices to signal a frequency level.
P4.2.1 254 DC-Brake Current 1,2,3 RW
Use this parameter to set the amount of DC current as an amp value that is injected into the motor
during DC braking.
P4.2.2 263 Start DC-Brake Time 1,2,3 RW
Use this parameter to set the length of time the DC-brake is activated when the start command is given.
P4.2.3 262 Stop DC-Brake Frequency 1,2,3 RW
Use this parameter to set the frequency level in hz at which DC braking starts during the
deceleration phase.

Johnson Controls VS3 Series Specifications

General

Brand	Johnson Controls
Model	VS3 Series
Category	Inverter
Language	English