Volvo Penta TAD734GE, Installation Manual

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The regulator has a factory setting that has been optimized to suit the most common generator set applications.
Use the VODIA tool (including EMS software), to read and adjust the P, I and D sections of the engine speed regu-
lator. Adjustment is done to obtain more stable and even engine running, and to configure the engine for specific
generator set applications.
PID = Proportional, Integrating, Differentiating
Fig 2. P section too high
P-value amplifier (Gain), amplification of the difference
between the actual value and the set value.
A reduced value (Fig. 1) gives a weaker reaction to en-
gine speed differences. Reduce the P-value to reduce
oscillations arising from large differences in speed/load
application
.
An increased value (Fig. 2) gives a shorter response
time. Increase the P section for faster compensation to
large differences in engine speed / engine loading.
Fig 1. P section too low
I-value stabilizes (Stability), reacts to the time of the
speed deviation.
A reduced value (Fig. 3) increases the time taken by
the system to respond after a load change. Reduce the I
section to reduce the oscillations which are caused by
slow application of engine loading.
An increased value (Fig 4) gives a shorter response
time. Increase the I-value to provide better load re-
sponse for slowly increasing loads.
Fig. 3 I section too low
Engine speed regulator, adjustment