CONTREX CX-1200 - Manual (Page 227)

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STD SIGNAL MONITOR / CONTROL OUTPUTS P3/3
The STD Signal Monitor / Control Outputs screen (page 3) displays CO_Sig signal data. The CO_Sig is the
CX-1200 output signal that is the input to the drive as a velocity (or torque) command.
RampedRef
Ramped Reference (MP-31) displays the speed command, in Engineering Units per Time. This is the output of the
ramp calculations. When the ramp has been completed, the RampedRef (MP-31) should equal the ScaledRef (MP-30).
FeedFwd
Feedforward (MP-35) displays the estimated voltage command to the drive required achieve the commanded RampedRef
(MP-31). It is usually the major portion of the CO Volts (MP-37) signal.
Intgrl
Integral (MP-34) displays the value of the integral term (i.e., integrated error times the Ki constant) of the PID
compensator. Intgrl (MP-34) is displayed in Volts. Intgrl (MP-34) is a conditioned error signal that serves to adjust the
CO Volts (MP-37) to help achieve the desired speed. It is part of the PID error correction algorithm.
Trim Out
Trim Out (MP-36) displays the value of the output of the PID compensator. Trim Out is displayed in Volts. Trim Out
is the sum of the conditioned error signals that, combined with the FeedFwd (MP-35), become the CO Volts (MP-37).
Trim Out is the combination of all three terms of the PID error correction algorithm.
CO Volts
Control Output Volts (MP-37) displays the present value, in volts, of the Control Output (CO_Sig) signal to the drive.
It is the combination of FeedFwd (MP-35) plus Trim Out (MP-36).
CO Bits
Control Output Bits (MP-38) displays the present value, in DAC bits, of the Control Output (CO_Sig) signal to the
drive. CO Bits is the CO Volts (MP-37) expressed in DAC bits.
CO Max Bits
Control Output Maximum Bits (MP-39) reflects the maximum allowed output in units of DAC bits. The value of CO
Max Volts (CP-271) determines this parameter, based on the conversion of 32767 bits = 15 VDC.