Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 149)

No. Name Setting Range Default
b5-14 PID Feedback Low Detection Time 0.0 to 25.5 s 1.0 s
n b5-36: PID Feedback High Detection Level
Sets the feedback level used for PID feedback high detection. The PID feedback must exceed this level for longer than the
time set to b5-37 before feedback loss is detected.
No. Name Setting Range Default
b5-36 PID Feedback High Detection Level 0 to 100% 100%
n b5-37: PID Feedback High Detection Time
Sets the time that the PID feedback must exceed the value set to b5-36 before feedback loss is detected.
No. Name Setting Range Default
b5-37 PID Feedback High Detection Time 0.0 to 25.5 s 1.0 s
n PID Sleep
The PID Sleep function stops the drive when the PID output or the frequency reference falls below the PID Sleep operation
level for a certain time. The drive will resume operating when the PID output or frequency reference rise above the PID Sleep
operation level for the specified time. An example of PID Sleep operation appears in the figure below.
PID Output
PID Sleep Level ( b5-15)
Sleep Delay Time
Sleep Delay Time
Run command enabled
Continues to output “During Run”
Internal Run
command
External Run
command
During Run
Stop
b5-16 b5-16
Run
Figure 5.13 PID Sleep Operation
Notes on using the PID Sleep function
• The PID Sleep function is active even when PID control is disabled.
• The PID Sleep function stops the motor according to the stopping method set to b1-03.
The parameters necessary to control the PID Sleep function are explained below.
n b5-15: PID Sleep Function Start Level
Sets the level that triggers PID Sleep.
The drive goes into Sleep mode if the PID output or frequency reference is smaller than b5-15 for longer than the time set to
b5-16. The drive resumes operation when the PID output or frequency reference is above b5-15 for longer than the time set
to b5-16.
No. Name Setting Range Default
b5-15 PID Sleep Function Start Level 0.0 to 400.0 Hz 0.0 Hz
n b5-16: PID Sleep Delay Time
Sets the delay time to activate or deactivate the PID Sleep function.
No. Name Setting Range Default
b5-16 PID Sleep Delay Time 0.0 to 25.5 s 0.0 s
n b5-17: PID Accel/Decel Time
The PID acceleration/deceleration time is applied on the PID setpoint value.
When the setpoint changes quickly, the normal C1-oo acceleration times reduce the responsiveness of the system as they
are applied after the PID output. The PID accel/decel time helps avoid the hunting and overshoot and undershoot that can
result from the reduced responsiveness.
5.2 b: Application
YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual 149
5
Programming