6
down cycle time can be programmed from
0 to 900 seconds in 60 second increments.
Note: Cool-down cycle can only be used when the
controller’s standby mode (parameter #30) is
programmed to consume electricity.
Oil Pressure Switch #12
This parameter is used to select the type
of oil pressure switch being used on the engine,
i.e., Normally Close, Normally Open or No Oil
Pressure Switch. The
“No Oil Pressure Switch” setting must be
selected when the MSS-200 is used in
combination with any other auxiliary engine
monitoring and shutdown system, i.e., EP-100,
MC-536 or MC-6K. In the solo mode the MSS-
200 can also be programmed to monitor oil
pressure. This feature adds starter motor
protection by preventing the starter motor from
engaging when the engine has oil pressure, or
if the pressure switch wire has been
disconnected. Applications requiring shutdown
for other critical functions like high temperature
or pump pressure can connect the switch wires
to the oil pressure input. Note: Making a small
jumper wire from the O/S terminal to Oel (oil)
terminal eliminates the need for adding an extra
relay for over-speed shutdown.
Oil Pressure Switch Delay #14
With this parameter a delay of 1 to 15 seconds
can be programmed for oil pressure switch
override. This feature gives the engine
a certain amount of time to build up oil pressure
during engine start prior to monitoring for
shutdown. This parameter is required only when
the MSS-200 is used in solo mode and when
the oil pressure parameter #12 is programmed
to either Normally Open or Normally Closed.
Auxiliary Engine Monitor #16
This parameter programs the MSS-200
controller to either a stand-alone application
(solo) or to an application utilizing an optional
engine shut device, i.e., EP-100, MC-536 or
MC-6K.
Duration of Start by Frequency #18
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 PNP
pickup. This feature not only disengages the
starter motor, but it’s 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 example with a 6 pole pair alternator
and a belt ratio of 2.0 :
6 x 500 x 2.0 6000
-------------------------- = --------- = 100 Hz
60 Seconds 60
G/S Frequency-based Load
Switch For Generator OR Over-speed
Shutdown For Pump #20 (Course)
Parameters #20, #22, #24 have two functions:
G/S frequency-based load switch for constant
speed generators applications or over-speed
shutdown for variable speed pump applications.
The generator switch (G/S) was originally
designed to activate an AC-producing
generator set, but this output can also used to
activate other accessories, i.e., air compressor
relief valve or throttle control.
