CONTREX ML-Drive - Manual (Page 62)

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Table 3-22 Entering Master / Follower Tuning Control Parameters
CP Parameter Name Parameter Value
CP-65 Gain (Proportional)
CP-66 Integral
CP-67 Derivative
CP-68 Feedforward
With Integral (CP-66) set to “0” , reduce
the Gain (CP-65) until the system becomes
unstable, then increase it slightly until the
system stabilizes. Reduced values will
increase Gain. To verify the stability of the
speed changes, you can access Tach
through either the Tach key or the Monitor
Parameter for Tach (MP-40).
While switching between the high and low
setpoints, decrease the Integral's default
value of “2000” until the speed error is
reduced within an acceptable time frame.
To verify the stability of the speed changes,
you can access Tach through either the
tach key or the Monitor Parameter for Tach
(MP-40).
The Derivative should not be adjusted in
most systems. However, sometimes in the
larger inertia systems you can improve
performance by lowering the Derivative
term to the point of instability and then
increasing it incrementally until the system
stabilizes.
When the ML -Drive has reached stability
at 1000 RPM, enter the value of PIDF
Output (MP-49) into Feedforward (CP-68).
After the Control Parameters for Tuning have been entered, you can enter the Control
Parameters for the Alarms for either the Master or the Follower mode. Alarms are
discussed in the following section.