Yaskawa Z1000 AC Drive HVAC - Manual (Page 280)

<5> When setting F7-13 to 0, all IP addresses (F7-01 to F7-04) must be unique.
<6> When setting F7-13 to 0, also set parameters F7-01 to F7-12.
<7> When F7-14 is set to 0 or 2, be sure to also set F7-15.
B.6 F: Communication Option Parameters
280 YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual