Auto Reset Parameters - Honeywell NXL Series Applications Manual

Honeywell

4.9 Auto Reset Parameters

The automatic restart function is active if the value of par. 2.1.10 = 1. There are always three
restart trials
2.8.1 Automatic restart: Wait time
Defines the time before the frequency converter tries to automatically restart the motor after the
fault has disappeared.
2.8.2 Automatic restart: Trial time
The Automatic restart function restarts the frequency converter when the faults have
disappeared and the waiting time has elapsed.
Fault trigger
Motor stop signal
Motor start signal
Supervision
Fault active
RESET/
Fault reset
Figure 1- 24. Automatic restart.
The time count starts from the first autorestart. If the number of faults occurring during the trial
time exceeds three, the fault state becomes active. Otherwise the fault is cleared after the trial
time has elapsed and the next fault starts the trial time count again.
If a single fault remains during the trial time, a fault state is true.
2.8.3 Automatic restart, start function
The Start function for Automatic restart is selected with this parameter. The parameter defines
the start mode:
0 = Start with ramp
1 = Flying start
2 = Start according to par. 2.1.8
Description of parameters
Wait time Wait time
Par. 2.8.1 Par. 2.8.1
Restart 1
Parameter 2.1.21 = 1 (3 trials)
Page 49 (68)
Wait time
Wait time
Par. 2.8.1 Par. 2.8.1
Restart 2 Restart 3
Trial time
Par. 2.8.2
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