ABB ACS880-17 - Page 279

Parameters 279
31.33 Emergency ramp
supervision delay
If parameter 31.32 Emergency ramp supervision is set to 0%,
this parameter defines the maximum time an emergency stop
(mode Off1 or Off3) is allowed to take. If the motor has not
stopped when the time elapses, the drive trips on 73B0
Emergency ramp failed, sets bit 8 of 06.17 Drive status word
2, and coasts to a stop.
If 31.32 is set to a value other than 0%, this parameter defines
a delay between the receipt of the emergency stop command
and the activation of the supervision. It is recommended to
specify a short delay to allow the speed change rate to
stabilize.
0 s
0…32767 s Maximum ramp-down time, or supervision activation delay. 1 = 1 s
31.35 Main fan fault
function
Selects how the drive reacts when a main cooling fan fault is
detected.
Note: With an inverter unit consisting of one or more frame
R8i inverter modules with speed-controlled fans, it may be
possible to continue operation even if one main fan of a
module stops. When fan failure is detected, the control
program will automatically
• set the other fan of the module to full speed
• set the fans of the other modules (if any) to full speed
• decrease the switching frequency to a minimum, and
• disable the supervision of temperature difference between
the modules.
If this parameter is set to Fault, the inverter unit will trip (but
still carry out the actions listed above). Otherwise, the inverter
will attempt to continue operation.
Warning
Fault The drive trips on fault 5080 Fan.0
Warning The drive generates an A581 Fan warning. 1
No action No action taken. 2
31.36 Aux fan fault
function
(Only visible with a ZCU control unit)
Selects how the drive reacts when an auxiliary fan fault is
detected.
Fault
Fault The drive trips on fault 5081 Auxiliary fan not running.
Note: The fault is suppressed for two minutes after power-up.
During this time, the drive only generates a warning, A582
Auxiliary fan not running.
0
Warning The drive generates a warning, A582 Auxiliary fan not
running.
1
No. Name/Value Description Def/FbEq16