Yaskawa Z1000U - Manual (Page 153)

No. Parameter Name Setting Range Default
b5-25 PID Setpoint Boost Setting 0 to 100% 0%
n b5-26: PID Maximum Boost Time
Associated with the Snooze Function. In cases where the temporary PID Setpoint (intended PID setpoint + PID Setpoint Boost)
cannot be reached within the PID Maximum Boost Time (b5-26), the Setpoint Boost is interrupted and the Drive output is
turned off.
No. Parameter Name Setting Range Default
b5-26 PID Maximum Boost Time 0 to 2600 s 0 s
n b5-27: PID Snooze Feedback Level
The second method of initiating the Snooze Function. The drive output shuts off when the PID feedback level exceeds the
PID Snooze Feedback Level (b5-27).
Normal drive and PID operation return after the PID feedback drops below the PID Snooze Deactivation Level (b5-24). Snooze
activates when both b5-22 and b5-27 conditions are met. There is no time delay for deactivation.
Sets as a percentage of maximum frequency.
No. Parameter Name Setting Range Default
b5-27 PID Snooze Feedback Level 0 to 100% 60%
n b5-28: PID Feedback Function Selection
When b5-28 is set to 1, the square root of the PID feedback is compared to the PID Setpoint to determine appropriate drive
output to properly regulate the system.
This is helpful in cases where the measured feedback is pressure, but the PID loop needs to regulate flow.
No. Parameter Name Setting Range Default
b5-28 PID Feedback Function Selection 0, 1 0
0: Disabled
1: Square Root
n b5-29: PID Square Root Gain
A multiplier applied to the square root of the feedback. If the PID Function is regulating the flow of a closed loop system by
using a pressure feedback, it may be convenient to view the square root of the PID output using monitor U1-37.
No. Parameter Name Setting Range Default
b5-29 PID Square Root Gain 0.00 to 2.00 0.00
n b5-30: PID Feedback Offset
Sets PID feedback Offset as a percentage of maximum frequency.
No. Parameter Name Setting Range Default
b5-30 PID Feedback Offset 0.00 to 100.00% 0.00%
n b5-34: PID Output Lower Limit
Sets the minimum possible PID controller output as a percentage of the maximum output frequency (E1-04). The lower limit
is disabled when set to 0.00%
No. Name Setting Range Default
b5-34 PID Output Lower Limit -100.0 to 100.0% 0.00%
n b5-35: PID Input Limit
Sets the maximum allowed PID input as a percentage of the maximum output frequency (E1-04). Parameter b5-35 acts as a
bipolar limit.
4.12 Advanced Drive Setup Adjustments
YASKAWA ELECTRIC TOEP C710636 10B Z1000U HVAC MATRIX Drive User Manual 153
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Start-Up Programming & Operation