Yaskawa AC Drive Z1000 Bypass Technical Manual - Manual (Page 202)

7. Then the drive catches a spinning motor via Speed Search and follows frequency reference to take control.
Refer to
Figure 5.60 for an example of the sequence that is followed when entering and exiting the Energy Savings Mode.
DRIVE FREQUENCY REFERENCE
DRIVE OUPUT FREQUENCY
DRIVE OUTPUT CONTACTOR
BYPASS CONTACTOR
ENERGY FREQ (Z1-17)
ENERGY FREF DBND (Z1-19)
ENERGY FREF DBND (Z1-19)
ENERGY FREQ (Z1-17)
ENERGY FREQ DBND (Z1-20)
ENERGY FREQ DBND (Z1-20)
Energy Savings Mode
Energy
Savings
Time (Z-122)
(Z1-23)
Min Baseblock
T
ime
(L
2-
03
)
Energy Delay Open
(Z
1-
24
)
Energy Delay Open (Z1-24)
Energy Delay Close
(Z
1-
25
)
Drive Enters Baseblock
Start Sequency to
Exit Energy
Savings Mode
Drive Enters Baseblock
Start Sequence to
Enter Energy
Savings Mode
Drive Exits
Baseblock and
Starts
Speed Search
DRIVE OUTPUT CURRENT
OUTPUT IOUT LVL (Z1-18)
ENERGY IOUT DBND (Z1-21)
ENERGY IOUT DBND (Z1-21)
t1 t2 t3 t4 t5 t6 t7 t8 t10 t11
t12 t13 t14 t15
Min Baseblock
T
ime
(L
2-
03
)
t16
Drive Exits Baseblock
Energy Delay Close
(Z
1-
25
)
t9
Energy Fref Increase
Figure 5.60 Drive Bypass Energy Savings Mode Sequence Example
n Z1-16: Energy Savings Mode
Enables and disables the Energy Savings Mode.
No. Name Setting Range Default
Z1-16 Energy Savings Mode Enable 0 to 2 0
Setting 0: Disable
Setting 1: Enable (Freq)
Setting 2: Enable (Freq + Output Current)
n Z1-17: Energy Savings Mode Frequency
Sets the value of the drive frequency reference for use in comparison to enter or exit Energy Savings mode.
No. Name Setting Range Default
Z1-17 Energy Savings Mode Frequency 0.0 to 60.0 Hz <1> 60.0 Hz <1>
<1> Values are given in Hz, but actual values are dependent upon unit settings using drive parameters o1-03, o1-09, o1-10, and o1-11.
n Z1-18: Energy Savings Mode Output Current Level
Allows system to switch when the output current rises above this level of motor rated current for time specified in Z1-22.
No. Name Setting Range Default
Z1-18 Energy Savings Mode Output Current Level 0.0 to 100.0% 0.0%
n Z1-19: Energy Savings Mode Frequency Reference Deadband
Sets the tolerance around the drive frequency reference value during comparisons to enter or exit Energy Savings mode
5.15 Z: Bypass Parameters
202 YASKAWA ELECTRIC SIEP YAIZ1B 01D YASKAWA AC Drive – Z1000 Bypass Technical Manual