ABB ACH550-UH User Manual page 116

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Group 17: OVERRIDE
This group defines the source for the override activation signal, the override speed/
frequency and pass code and how the override is enabled and disabled.
When override DI is activated, the drive stops and then accelerates to the preset
speed or frequency. When the DI is deactivated the drive stops and reboots. If the
start command, run enable and start enables are active in the AUTO mode the drive
starts automatically and continues normally after override mode. In the HAND mode
the drive returns to OFF mode.
When override is active:
• Drive runs at preset speed or PID output (defined by 1707 OVERRIDE REF)
• Drive ignores all keypad commands
• Drive ignores all commands from communication links
• Drive ignores all digital inputs except override activation/deactivation, and RUN
ENABLE/START ENABLE inputs configured prior to setting 1705 OVERRIDE
ENABLE to ON.
• Drive displays alarm message "2020
The following faults are ignored:
Parameters
3 DEVICE OVERTEMP
5 OVERLOAD
6 DC UNDERVOLT
7 AI1 LOSS
8 AI2 LOSS
9 MOTOR TEMP
10 PANEL LOSS
12 MOTOR STALL
14 EXTERNAL FLT 1
15 EXTERNAL FLT 2
17 UNDERLOAD
18 THERM FAIL
21 CURR MEAS
22 SUPPLY PHASE
24 OVERSPEED
28 SERIAL 1 ERR
29 EFB CONFIG FILE
30 FORCE TRIP
31 EFB 1
32 EFB 2
33 EFB 3
34 MOTOR PHASE
1001 PAR PFA REFNEG
ACH550-UH User's Manual
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OVERRIDE MODE