YASKAWA Z1000 CIMR-ZU*A Series User Manual

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b5-26: PI Maximum Boost Time
Associated with the Snooze Function. In cases where the temporary PI Setpoint (intended PI setpoint + PI Setpoint Boost)
cannot be reached within the PI 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 PI Maximum Boost Time 0 to 2600 s 0 s
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b5-27: PI Snooze Feedback Level
The second method of initiating the Snooze Function. The drive output shuts off when the PI feedback level exceeds the PI
Snooze Feedback Level (b5-27).
Normal drive and PI operation return after the PI feedback drops below the PI 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 PI Snooze Feedback Level 0 to 100% 60%
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b5-28: PI Feedback Function Selection
When b5-28 is set to 1, the square root of the PI feedback is compared to the PI Setpoint to determine appropriate drive output
to properly regulate the system.
This is helpful in cases where the measured feedback is pressure, but the PI loop needs to regulate flow.
No. Parameter Name Setting Range Default
b5-28 PI Feedback Function Selection 0, 1 0
0: Disabled
1: Square Root
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b5-29: PI Square Root Gain
A multiplier applied to the square root of the feedback.
No. Parameter Name Setting Range Default
b5-29 PI Square Root Gain 0.00 to 2.00 0.00
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b5-30: PI Feedback Offset
Sets PI feedback Offset as a percentage of maximum frequency.
No. Parameter Name Setting Range Default
b5-30 PI Feedback Offset 0.00 to 100.00% 0.00%
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b5-34: PI Output Lower Limit
Sets the minimum possible PI 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 PI Output Lower Limit -100.0 to 100.0% 0.0%
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b5-35: PI Input Limit
Sets the maximum allowed PI input as a percentage of the maximum output frequency (E1-04). Parameter b5-35 acts as a
bipolar limit.
No. Name Setting Range Default
b5-35 PI Input Limit 0 to 1000.0% 1000.0%
1.2 b: Application
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YASKAWA SIEP YAIZ1U 03B YASKAWA AC Drive – Z1000 Programming Manual

YASKAWA Z1000 CIMR-ZU*A Series Specifications

General

Series	Z1000 CIMR-ZU*A Series
Category	Controller
Voltage Classes	200V, 400V
Enclosure	NEMA 1, NEMA 12
Frequency Range	0.01 to 400 Hz
Cooling Method	Fan Cooled
Operating Temperature	-10°C to 50°C
Application	HVAC
Control Method	V/f Control
Input Voltage	200-240V, 380-480V
Frequency Range (Input)	50/60 Hz
Power Rating	0.4kW to 630kW
Protection Features	Overcurrent, Overvoltage, Undervoltage
Communication Options	Modbus
Storage Temperature	-20°C to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Output Voltage	0-100% of input voltage