User Guide

4-4 Parameter Index MN850
Advanced Menu Continued
Block Title Parameter Description
Advanced Contactor Delay A delay is required when an input contactor is energized by the soft–start “Run” relay.
This delay allows bouncing contactor armature to settle during the “Closed” position.
Value can be 20 to 800 milliseconds. Parameter 71.
Trip Sensitivity A numerical value that sets the sensitivity level for all trips. A larger number provides
slower response to a trip. Value can be 1 to 15. Parameter 72.
Station Number Reserved for future use.
Language English (44) is preset. Value can be 1 to 255. Parameter 2.
Firing Mode Sets the SCR firing mode to one of the following: (Value can be 0 to 3. Parameter 7.)
0 – Normal, 3 phase induction motor, Soft–Start conducting line current.
1 – Induction motor (Delta), Soft–Start conducting phase current.
2 – Closed loop phase control for electrical loads other than motors.
Current sensing is active but current protection is disabled.
3 – Open loop phase control for electrical loads other than motors.
Current sensing is disabled and current protection is disabled.
Note: Modes 2 and 3 are not suitable for motor loads and may damage motor and
control. These modes are suitable for electrical loads such as lighting or
resistive heaters.
Stop Smoothing Adjustable voltage ramp for smooth deceleration. Motor current is monitored and stop
smoothing will continue until the Start Pedestal value is reached. Value can be 1 to
255. Parameter 122.
Auto Features Menu
Block Title Parameter Description
Auto Features Settings Display starting method, either Keypad or Remote. Also displays operating mode
(Optimizing or Full Voltage).
Auto Jog If on, and Stop is commanded within 0.5 seconds of a start command the control will
change to jog mode. In jog mode, the decel ramp is changed to 0 seconds.
Repeatedly pushing the Start/Stop button will cause the motor to move slightly in the
same direction.
Auto Pedestal If on, will automatically increase the voltage pedestal to start motor rotation.
Auto End Start If on and motor reaches full speed during ramp up, the start ramp will be terminated and
full voltage will be applied to the motor.
Auto Stop If on, automatically activates stop smoothing if required by the load during stop for
smooth deceleration of the load.
Auto End Stop If on, detects a stalled or stopped motor and terminates ramp down (turns SCR’s off)
during stop.
Auto Bypass If on, control detects the bypass contactor closing and automatically disables shorted
SCR detection (activates shorted SCR detection when contactor opens).
Auto 3MC If on, reduces inrush current by allowing the motor voltage to build up from zero to the
set voltage pedestal over 2 to 3 cycles. On “Sticky” or “Traction” type loads, this
mode allows dynamic boost and stall sensing to start load.
Auto Off Off – No effect.
On – changes the setting of all “Auto” parameters. If on, the parameter turns off etc.
Stop Smoothing If on, allows motor deceleration smoothing (see Stop Smoothing Rate, Advanced menu).