Johnson Controls VS3 Series User Manual

172
Appendix A—Description of parameters
VARIABLE SPEED DRIVE SERIES III LIT-12012999—June 2018 www.johnsoncontrols.com
Code Modbus ID Parameter Application RO/RW
P6.1.3 2158 Ground Fault Limit 1,2,3 RW
This parameter sets the level of the ground fault protection, this protection is based off the amount of
leakage current that is seen to ground on the output of the drive.
P6.1.4 310 Motor Thermal Protection 1,2,3 RW
Use this parameter to set the device reaction to a “Overtemperature Motor” fault condition. This failure
could be device dependent. Deactivating this protection, i.e., setting parameter to 0, will reset the
thermal stage of the motor to 0%.
0 = No response
1 = Warning
2 = Fault, stop mode after fault according to standard stop mode
3 = Fault, stop mode after fault always by coasting
P6.1.5 311 Motor Thermal F0 Current 1,2,3 RW
This parameter sets minimal current at speed zero without thermal overload.
The default value is set assuming that there is no external fan cooling the motor. If an external fan is
used, this parameter can be set to 90% (or even higher).
Note: The value is set as a percentage of the motor nameplate data, Para ID486 (nominal current of the
motor), not the drive’s nominal output current. The motor’s nominal current is the current that the motor
can withstand in direct on-line use without being overheated.
If you change the parameter Nominal current of motor, this parameter is automatically restored to the
default value.
Setting this parameter does not affect the maximum output current of the drive, which is determined by
Param ID1679 alone.
Figure 62. Motor thermal current it curve
100%
0
Overload Area
P9.9 = 40%
Cooling
P
f
f
n
I
T

Johnson Controls VS3 Series Specifications

General

Brand	Johnson Controls
Model	VS3 Series
Category	Inverter
Language	English