Class1 Vernier Throttle for Cummins - Manual (Page 9)

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DOC 101058C_c:\manuals\throttles\cummins\cumthrot.p65
Operation
For questions or concerns regarding the governor, call Class1 at 352-629-5020 or FAX 352-629-2902.
When the throttle interface module is powered up by the safety (interlock) system the throttle
module will perform a self check and the LED on the module will turn on and then turn off after
the self check if everything passes. (approx. 4 secs)
After the self check, the interface will verify that the throttle is fully closed. If the throttle is not
fully closed, the LED on the interface module will flash once every 2 seconds until the zero
position is detected.
IMPORTANT The throttle interface module will not command increased torque from the
engine until the zero position is detected.
This feature is present to avoid unintentional increases in engine speed should the throttle be
left in the open position.
The fast idle input overrides this feature and should be used with caution.
After the interface module passes the self test and detects zero throttle, it is ready to control the
engine. The interface module controls the engine electronically by sending torque commands
to the Engine Control Module (ECM).
Once the throttle has been opened approximately 1/4 turn, the interface module will begin to
control the engine. The interface module will override the foot throttle in the cab. There will be
a short delay of 1-2 seconds when the interface module initially takes control from the foot
throttle. Once control is established, the throttle response will be immediate and precise. For
best operation, open the throtlle from 1/4 to 1/2 turn and wait until you hear or see the engine
RPM increase to 800. At this time the interface module is in control of the engine and normal
operation of the vernier throttle is supported from 800 to full engine speed.
When finished operating the remote throttle, the operator should return the throttle to idle and
turn the control to it’s full clockwise position. When the interface module detects this position,
and engine speed is at or below 800 RPM, it will release control to the foot throttle after 3-4
seconds.
Each time the throttle is moved from idle or back to idle, the transfer of control takes place and
the operator should expect a short delay in control response at these times.
Note: When the throttle interface is not powered, it is physically disconnected from the engine
so that it cannot under any circumstance control engine speed or interfere with another engine
speed control.