CONTREX CX-1200 - Manual (Page 141)

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VELOCITY LOOP P2/2
The Velocity Loop screen includes parameters for the loop-type selection, the PID parameters for the
Velocity Loop (Kp, Ki, Kd), and four tuning monitor parameters
Trim Authority
The trim contribution to the DAC output is limited to positive and negative Trim Authority (CP-333).
Integral Limit
The integral contribution to the trim term is limited to the positive and negative Integral Limit (CP-334). Integral Limit
(CP-334) can decrease the effects of integral windup or it can limit the maximum effect of the integral term.
DerivThd VL
Derivative Threshold Velocity Loop (CP-323) is the minimum speed error that is required before the derivative term in
the PID velocity algorithm gains influence. Increase the DerivThd VL (CP-323) to prevent the derivative term from
acting on signal noise.