Yaskawa AC Drive Z1000 AC Drive HVAC Fan User Manual

Page 147

Fwd Run

Drive Enable-Customer

Safeties

Override (Smoke Purge)

Drive/Bypass Select

BP Drive Relay Contact

Output

BAS Interlock

BP Bypass Relay Contact

Output

BP BAS Interlock Contact

Output

Output Frequency

L2-03

Speed

Occurs

L2-03

Bypass Run

Figure 1.79 BAS Interlock

Transfer on Fault

When the bypass functionality is enabled and the BP Auto Transfer on Fault Enable (S4-01) is enabled, the drive can perform

a transfer to bypass upon a drive fault. If the drive is running when a fault occurs, an immediate transfer to bypass will occur.

for details.

The drive will keep the BP Bypass Relay Contact closed until the run command is removed, the BP Customer Safeties is

opened, or the BAS Interlock Input MFDI is programmed and opens. When the fault is manually reset, the drive performs the

switch.

for details.

This functionality also requires that Auto-Restart Retries is set to zero (L5-01 = 0) to ensure that the drive does not attempt

an automatic fault retry.

1.11 S: Special Parameters

YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual

147

Parameter Details