• Available only in the dw2xx-v2 series products
• Requires library: Process Control (option -05)
• Firmware versions 0x2121 and later

Section Control - PI Setpoint

The PI term's desired setpoint. The PI's feedback signal is subtracted from the setpoint to produce the error term.

Section Control - PI Feedback

The PI term's feedback signal. It is subtracted from the setpoint to produce the error term.

Section Control - Integral Preset Value

The integral term is immediately set to this value while Integral Preset Enable is active.

Section Control - Proportional Gain

The input error is multiplied by this value to produce the proportional term.

Larger proportional gains produce stronger responses. Too large a value can lead to system instability in the form of vibration or violent jerking.

When the proportional gain is too small, system instability is characterized by slower hunting around the setpoint, possibly including large swings.

Section Control - Integral Time

The time in which the integral term will change by 100% in response to a 100% error input.

Smaller integral times produce faster responses. Too short an integral time can lead to system instability in the form of vibration or violent jerking.

When the integral time is too long, system instability is characterized by slower hunting around the setpoint, possibly including large swings.

Section Control - Integral Preset Enable

The integral term is immediately set to the integral preset value while this parameter is active.

Section Control - PI Enable

Both the PI output, and the integral term are immediately reset to 0.00% while this parameter is inactive.

Section Control - PI Lower Clamp

Both the PI output and the integral term can not be less than this value.

When the output equals this number, the integral term is held at its current value.

Section Control - PI Upper Clamp

Both the PI output and the integral term can not be greater than this value.

When the output equals this number, the integral term is held at its current value.

Section Control - PI Output

The PI output is used to provide negative feedback in the section.

The output is multiplied by the other trim scalers to produce Trim Output.

Section Control - PI Error

Read-only. PI Feedback input is subtracted from PI Setpoint to produce the PI input error.

Section Control - Proportional Term

Read-only. PI Error is multiplied by Proportional Gain to produce the Proportional Term.

Section Control - Integral Term

Read-only. PI Error is clamped and then continuously integrated according to the Integral Time to produce the Integral Term

Section Control - PI Clamp Monitor

Read-only. Active when the PI output is equal to the upper or lower clamp value.

The Integral Term is held at its current value while the clamp is active.

Section Control - Integral Error Clamp

Places a symmetrical clamp around the PI input error prior to passing the error to the integrator. This prevents saturation of the integral term that may be caused by large, transient input errors.

Section Control - Integral Enable

The integral term is immediately reset to 0.00% while this parameter is inactive.

Section Control - Integral Hold

The integral term is held at its current value while this parameter is active.

Section Control - Ramped Clamp Input

Read-only. The sum of the line speed and trim terms.

Section Control - Upper Ramped Clamp

Ramped Clamp Output can not exceed this value.

The actual, active clamp is the product of Ramp and this value.

Section Control - Lower Ramped Clamp

Ramped Clamp Output can not be less than this value.

The actual, active clamp is the product of Ramp and this value.

Section Control - Ramp Time / Ramp Rate

The actual upper and lower clamps are the product of Ramp and their preset values.

Select units, either 100% ramp time in seconds, or ramp rate per second, %/s.

Section Control - Ramped Clamp Enable

The clamps and the Ramped Clamp Output are immediately reset to zero while this parameter is active, Reset

Ramping begins at the falling edge of this input.

Section Control - Ramp

Read-only. Increases from zero to 100% according to the ramp time / rate, following the falling edge of Ramped Clamp Enable.

Section Control - Ramped Clamp Output

Read-only. Equal to Ramped Clamp Input when not limited by the active clamps.

Section Control - Line Speed

The primary speed reference for this control section.

Section Control - Variable Trim

Provides a trim term that is a linear function of line speed.

Section Control - Fixed Trim

An independent trim term that is added with the line speed variable trim.

Section Control - Trim Enable

The trim term is immediately reset to zero while this parameter is active, Enable.

Section Control - Multiplier

The output of the ramped clamp is multiplied by this value.

Section Control - Divider

The scaled output of the ramped clamp is divided by this value.

Section Control - Direction

Reverse the direction of the section. The polarity of the pre-clamp reference switches sign when the direction is switched.

Section Control - Trim Scale

Scales the sum of Variable Trim and Fixed Trim to produce a final scaling factor on the PI output.

Section Control - Output

Read-only. The function block output is the speed reference for this machine section.

Section Control - Upper Output Clamp

The function block output can not exceed this value.

Section Control - Lower Output Clamp

The function block output can not be less than this value.