Multiquip AP6 Series - Manual (Page 36)

PAGE 36 — AP6/AP8 SERIES TRASH PUMPS • OPERATION AND PARTS MANUAL — REV. #0 (06/11/14)
Duration of Start By Frequency Parameter
The MSS-200 will disengage the starter motor when the
engine has reached a certain programmed frequency via
the frequency terminal of the alternator or proximity switch
(PNP).
This feature not only disengages the starter motor, but it
is also used as a safety feature by preventing the engine
from starting when the controller senses RPM.
Considering that a starter motor typically disengages at 500
RPM, use the following calculation below using an engine
with a 6 pole pair alternator and a belt ratio of 2:X where:
Pump Overspeed Shutdown (Course) Parameter
1. Parameters 20, 22, and 24 provide overspeed
shutdown for variable speed pump applications.
2. For parameter 20 select the next smaller number
calculated. In our example we calculated 360 Hz. The
next smaller number on the programming table is
240 Hz. Press the AUTO button until the LED pattern
matches the 240 Hz value.
Pressing the OFF/SET button (Figure 26) saves the
programmed value and moves you to parameter 22.
Figure 26. SET Button (Saving Data)
6 x 500 x 2
=
60 Seconds
6000
60
= 100 Hz = X
6 x 1800 x 2
=
60 Seconds
21600
60
= 360 Hz = X
EXAMPLE: 1800 RPM Engine Engagement
PRESS TO SAVE VALUE
OPERATION (AUTO MODE)
Pump Overspeed Shutdown (Medium) Parameter
Subtract the frequency value entered in step 2 from the
total frequency calculated from step 1.
3. Divide the balance by the multiplier 16. Since you can
not use a fraction use the next smaller number (7) and
multiply by the multiplier (16) which in this example is
112 Hz. With this example, select the LED pattern that
matches 112 Hz.
Pump Overspeed Shutdown (Fine) Parameter
4. Subtract 360 Hz from the total sums entered in steps 1
and 2. The multiplier for step 3 equals 1 Hz. Parameter
24 would be programmed to 8 Hz.
Variable Speed Pump Mode Selection Parameter
1. Entering a value greater than zero programs the MSS-
200 controller to a constant engine speed mode. The
frequency programmed in parameter 26 then becomes
the overspeed shutdown frequency.
Should the engine speed mode not require overspeed
protection, then parameter 26 should be programmed
to the highest overspeed frequency setting available
(150 Hz). Use the following 2000 RPM calculation
to program overspeed for a constant engine speed
application:
Subtract 360 (total Hz of G/S in step #20, 22 and 24)
from 400 Hz (Over-Speed Hz) 400 – 360 = 40 Hz.
The multiplier for parameter 26 equals 10. Press the
AUTO or MAN buttons until the LED pattern matches
the 40 Hz value.
EXAMPLE: 360-240 = 120 (Balance)
120
16
= 7.5 7.5 7x16 = 112 Hz
240 Hz + 112 Hz = 352 Hz
360 Hz - 352 Hz = 8 Hz
EXAMPLE: Calculating Overspeed (Hz)
6 x 2000 x 2
=
60 Seconds
24000
60
= 400 Hz