Chapter 5 Description of Function Parameters
5.2 Detailed Description of Function Parameters
Functional Code P0 Inception Voltage Setting Range: 30~70% Factory Default Setting: 30%
Functional description: This function is used to set the voltage value of motor soft starter when
it is being started.
Note: Voltage ramp mode is enabled; Set the code P7 to "1", the value can be modified; Set P7 to
"0",. the inception voltage will be 40%.
Functional Code P1 Soft Starting Time Setting Range: 2~60S Factory Default Setting: 16S
Functional description: This function is used to set the time spent by the motor from inception
voltage to rated voltage.
Note: Voltage ramp mode is enabled; Set the code P7 to "1", the value can be modified.
Functional Code P2 Soft Stop Time Setting Range: 0~60S Factory Default Setting: 00
Functional description: This function is used to set the time spent by the motor from
being just stopped at rated speed to full stop. Set this value to "0", there is a free stop.
Note: There are two stop modes for motor soft starter: soft stop and free stop. If the
machine has an one-to-multi system, then set the value to "0".
1
Soft Stop
If the code P2 is not set to "0", then soft stop mode is selected. The figure below is the
output current waveform in the mode of soft stop. Under this condition, the motor is
powered by a thyristor shifted from a bypass contactor to a soft starter; the output
voltage of this soft starter gradually decreased from full voltage till it stops completely,
thus the motor decelerates smoothly and mechanical oscillation can be avoided. The
output cut-off voltage of soft stop is equal to the Inception Voltage.
In the mode of soft stop, surf of water pump loads can be reduced or even removed,
and large current impulse caused by soft stop can be reduced. The current limitation
value of soft stop is a percentage reckoned on the starting current-limiting value.
Chapter 5 Description of Function Parameters
2
Free Stop
If the code P2 is set to "0", then free stop mode is selected.
In this stop mode, once stop command is received, the soft starter will disconnect the
bypass contactor and disable voltage output of the thyristor. Then the motor will
gradually shutdown due to load inertia. To avoid open phase error report, P2 should be
set to this mode if the soft starter adopts one-to-multi wiring method.
To extend the service life of soft starter, free stop mode is generally preferred if there
is no need to adopt soft stop mode. In free stop mode, instantaneous output is
completely disabled, thus instantaneous impulse of heavy current can be avoided. ZJR1
series of soft starters provide 6 working modes applicable to various kinds of motors
and loads. So users should choose a proper one according to different applications.
Functional Code P3 Starting Limitation Current Setting Range: 50~500% Default Setting: 400%
Functional description: This function is used to set the peak output current value of a
motor soft starter when it is starting. The formula is: set value
motor rated current
(Function PC)= peak current (unit: A) that is limited by a motor softer starter to be output.
Note: Current limiting mode enabled; If the code P7 is set to "0", the modification will be
valid; If P7 is set to "1", the current limiting value will be 400%.
Functional Code P4 Max. Working Current Setting Range: 50~200% Default Setting: 100%
Functional description: Maximum working current refers to maximum current
performing sustainable operation whose value is reckoned on the basis of the set
value in the functional code PC. If the current exceeds the max value, there will be an
inverse-time thermal relief protection.
Note: Modification will be valid if the code P7 is set to "0".
Functional Code P5 Undervoltage Protection Setting Range: 60~90% Default Setting: 80%
Functional description: When the actual working voltage is lower than the set
value, then protection for motor soft starter is disabled and the LED display F09.
Functional Code P6 Overvoltage Protection Setting Range: 100~130% Default Setting: 120%
Functional description: When the actual working voltage is higher than the set
value, then protection for the motor soft starter is disabled and the LED display F10.
Functional Code P7 Starting Mode Setting Range: 00~05 Default Setting: 01
1) Current-limiting Start
If the code P7 is set to "0" (indicating current limiting), then current starting
mode is selected. The figure below is a current change waveform of a motor in the
mode of current-limiting start. "l1" in the figure refers to the set value of starting
current-limiting. When the motor starts, the output voltage will rise rapidly till the
motor current reaches the set current-limiting value "l1" and
