Chapter 6 – Parameters
ACH 500 Programming Manual 6-37
Group 30.2
Automatic Reset
These parameter values can be altered with the ACH 500 running. The Range/
Unit column in Table 6-17 shows parameter values. The text following the
table explains parameter values in detail.
Table 6-17 Group 30.2
1 NUMBER OF RESETS
Sets the number of resets the ACH 500 will attempt before staying shut down
and indicating a fault.
2 TIME WINDOW
The maximum number of faults per time period to keep the Automatic Fault
Reset System active is given with Parameters 30.2.1 (Number of Resets) and
30.2.2 (Time Window).
If more faults occur or a fault persists longer than Trial Time, the drive stops.
The Automatic Fault Reset System resets the faults selected with Parameters
30.2.4 (Overvoltage), 30.2.5 (Undervoltage), 30.2.6 (Overcurrent), and 30.2.7
(AI Signal < Min).
3 TIME BETW.
RESET ATTEMPTS
0 – 120s
This parameter sets the time that the ACH 500 will wait after a fault occurs
before attempting to reset. If set to zero, the ACH 500 will reset immediately
making the fault transparent to the user. If set to a value greater than zero, the
drive will wait before resetting and will count down the time until reset on the
digital display. For AI Signal < Min Fault, the ACH 500 will start
immediately when the signal returns.
4 OVERVOLTAGE
If you select YES, the ACH 500 resumes operation when the DC bus voltage
returns to normal level.
Parameter Range/Unit Description
1 NUMBER OF RESETS 0 – 5 Number of faults limit for Autoreset
logic.
2 TIME WINDOW 1s – 180s Time limit for Autoreset logic.
3 TIME BETW. RESET
ATTEMPTS
0s– 120s Time delay between reset attempts.
4 OVERVOLTAGE NO/YES Enable automatic fault reset.
5 UNDERVOLTAGE NO/YES Enable automatic fault reset when
bus voltage returns to normal.
6 OVERCURRENT NO/YES Enable automatic fault reset.
7 AI SIGNAL < MIN NO/YES Enable automatic fault reset when AI
is greater than 0.25V.
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