Lenze MCH Series - Manual (Page 74)

70 13435744_EDBMH01_v13
81 MIN ALARM
This parameter setting represents the value that the feedback signal (in PID mode), or
speed reference signal (in open-loop speed mode), must fall below to activate the MIN
ALARM output (see Parameters 52 - 54).
82
MAX ALARM
This parameter setting represents the value that the feedback signal (in PID mode), or
speed reference signal (in open-loop speed mode) must exceed to activate the MIN
ALARM output (refer to Parameters 52 - 54).
NOTE 1:
The MIN ALARM function can be used to start and stop the drive based
on the level of the speed reference signal or PID feedback signal. This is
done by wiring a 2-wire start/stop circuit through the drive's Form C relay
or open-collector output, and setting the Form C relay or open-collector
output for MIN ALARM (Parameters 52 - 54). When the signal drops below
the MIN ALARM setting, the relay or open-collector output will de-energize,
which opens the start contact and stops the drive. When the signal is equal
to or greater than the MIN ALARM setting, the relay or open-collector
output will energize, which closes the start contact and starts the drive.
The drive must be in AUTO mode to use the MIN ALARM function to start
and stop and the drive.
NOTE 2: In order to use the MIN and MAX ALARM functions in non-PID mode, PID
FEEDBACK (Parameter 74) must still be programmed to match the speed
reference signal.
98 LANGUAGE (LANGUAGE SELECTION)
The MC Series drive can support other languages with the addition of an optional
LANGUAGE EEPROM chip installed in socket U11 on the control board of the
drive. If the EEPROM is not present, the default language will be ENGLISH. Also,
this parameter is not affected when the parameters are reset using Parameter 65 -
PROGRAM. Therefore, if a language other than ENGLISH is selected, it will remain in
effect after a RESET.
99
FAULT HISTORY
The FAULT HISTORY stores the previous eight fault conditions that caused the drive
to trip. The information stored here is view-only, it cannot be altered. The FAULT
HISTORY can be used to determine if there is a pattern, or trend, to the faults, which
may indicate a problem in the system. Refer to Section 20.0 - TROUBLESHOOTING
for more information on faults.
The FAULT HISTORY indicates the number of the fault (number 1 is the most recent
fault), the fault message, and the status of the drive at the time of the fault. An example
is shown below:
DRIVE
STATUS
99 FAULT HISTORY
3 OVERLOAD RUN
FAULT
MESSAGE
FAULT
ENTRY
In the example above, the third fault entry is being viewed, which is an OVERLOAD fault
that occurred while the drive was in a RUN state.