Dip Switch Settings:
1.  Frequency Selection:
With Switch Off The Output Frequency is 60 HZ.
With Switch On The Output Frequency is 200 HZ.

2.  Closed Loop Ramp Gain Set:
The ramp gain is the rate at which the driver will vary the pulse width to maintain set speed of the system once the current speed is out of the Deadband.  (SEE #3 BELOW)  depending on many factors in the system, if the ramp rate is too low, speed recovery under load changes may be sluggish.  If the ramp rate is too high the speed corrections may overshoot and cause oscillations.  To set, turn dip 2 on and use the ramp up/down inputs to set the rate while watching the leds.  A higher number is a faster rate.  Turn the switch off when set.


3.  Closed Loop Deadband Set:
The Deadband is  a percentage of the set speed within which the driver uses the smallest amount of correction to maintain set speed.  This allows for more precise speed control under smaller load changes.  If the speed changes by more than the off the Deadband is 5 percent of the set speed, and with it on the Deadband is 10 percent.

 5.  Rampback Mode:
If the switch is off, Rampback Mode is off and the PWM output will be at a minimum when the stop/go input switches from stop to go.  If the switch is on, the PWM output will ramp back to it's last setting when stop/go is switched from stop to go.  The unit will also ramp back to the last setting after a powerup, if the  stop/go input has been cycled at least once to store the setting.

 
6.  Closed Loop On/Off:
For closed loops operation this switch must be on and a speed sensor installed.  This switch must be off if no sensor is being used and in open loop operation..

7.  Minimum Duty Cycle:
The minimum pulse width setting has a dual purpose.  First, it can be used to set a minimum speed.  Secondly, it's used in conjunction with the span (SEE #8 BELOW) adjustment to eliminate the "dead" portion of the solenoid's response to the output, when starting to turn on.  to set the min, turn the switch on and use the ramp up/down inputs to set the desired speed. turn the switch off when set.  Note that when the  switch is turned off the speed will increase from the  set value.  This is normal.  The ramp down input will now return it to the minimum.  The minimum can be  adjusted to approximately 65% Duty Cycle

4.  Manual Ramp Rate:
The Manual Ramp Rate is the rate at which the PWM are used and also the rate of Rampback if Dip 5 is on.  To set, turn the switch on and use the up/down inputs to set the rate while watching the Leds.  A higher number is a slower rate.  Turn the switch by frequency selection.  Therefore set the frequency first and then the ramp rate.

IMPORTANT NOTE:
The settings are active while the unit is powered up, but will be lost on power down  if not stored.  To store the settings , switch the stop/go input to stop.  Doing this stores the settings in a non-volitile memory and the unit can be powered down without loss of the settings.  Note that all settings should be made with closed loop operation turned off.  Also note that  while making settings the solenoid will ge in operation only when setting the minimum duty cycle.
8.  Span/Max Duty Cycle Set:
The span adjustment allows the driver to use most or all of it's  255 step resolution within a "window" of the solenoid/system operation.  This allows for smooth and precise speed adjustment and improved closed loop operation.  This is especially important with solenoids thatare not rated by nominal voltage,f but rather a range of current input, and would normally require a specil propriatary controller.  Th4 span settign is done by trial and error.  Fisrst set the minimum descrided above.  Next turn on switch 8 and select an LED settting neqr the middle.  Turn thw switch off and use the ramp up input to get to the maximum speed at that setting, unde full load.  If the speed d=cannot be obtained, repeat and set to a higher number.  If more speed than necessary, set to a lower number.  The final setting should always be slightly more speed than necewssary so that the driver has smoe :headroom: to make speed corrections at the high end, when in closed loop operation.  The maximum spn setting is limited to seven.  This provides a 99% Duty Cycle with all 10 LEDS lit in normal operation.
See table below for the approximate maximum duty cycle corresponding to the LEDS lit.
Back to Rampmaster LEDS            % Duty Cycle
1 30
2 45
3 55
4 65
5 75
6 85
7 99