YASKAWA Z1000U Series Programming Manual page 154

1.11 S: Special Parameters
Fwd Run
Bypass Run
Drive Enable-Customer
Safeties
Override (Smoke Purge)
Drive/Bypass Select
BAS Interlock
BP Drive Relay Contact
Output
BP Bypass Relay Contact
Output
BP BAS Interlock Contact
Output
Output Frequency
Drive Fault
Energy Savings Mode
When the BP Energy Save Bypass Trigger Level (S4-02) is greater than 0, the Energy Savings Mode is enabled. If the drive
is running at a speed, as determined by SFS output equal to or greater than Maximum Output Frequency minus BP Energy
Save Bypass Trigger Level (E1-04 - S4-02) for the time specified in BP Energy Save Bypass Timer (S4-03), the drive output
frequency ramps to Maximum Output Frequency plus BP Energy Save Bypass Speed Increase (E1-04 + S4-04).
When the SFS output frequency is equal to Maximum Output Frequency plus BP Energy Save Bypass Speed Increase (E1-04
+ S4-04), the drive will perform an immediate transfer to bypass.
details.
The drive will continue to run on line voltage until the frequency command drops below E1-04 - S4-02 (Maximum Output
Frequency minus BP Energy Save Bypass Trigger Level). When this occurs, the drive performs the switch.
to Drive Operation on page 150
The BP BAS Interlock Open message will display when the drive is waiting for the BAS feedback before issuing an internal
Run command or closing the BP Bypass Relay Contact.
154
Drive
L2-03
Fault
Occurs
Figure 1.84 Transfer on Fault
for details.
YASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual
Refer to Immediate Transfer to Bypass on page 150
Speed
Search
Occurs
Drive
L2-03
Fault
Cleared
Refer to Transfer
for