Power Reduction Via The Can Interface; Acoustic Signaler - probst VM-301-KJ-GREENLINE Operating Instructions Manual

Warning: Only transmission of the message via the CAN interface.
▪
Standard error: Removal of the service specification. Transmission of the error
▪
message via the CAN interface.
Fatal error: opening of the battery circuit breaker, removal of the driving and charging
▪
releases, transmission of the error message via the CAN interface. Audible, continuous
signal.
If the error is corrected at the first two error thresholds (warning and standard error), the error is
deleted and not transmitted further. If there is a fatal error, the system can only be restarted by
rebooting the system.
6.4
POWER REDUCTION AND BEHAVIOUR OF THE ACOUSTIC SIGNALING DEVICE

6.4.1 Power reduction via the CAN interface

The battery system transmits the current capacity via the Limit_Data CAN message. The
following parameters influence the performance of the battery:
Battery temperature: A distinction is made between charge and discharge operation.
▪
Due to the lithium-ion cells, the temperature window is more limited during charging.
State of charge: If the system is highly charged, the charging or recuperation capacity is
▪
limited to prevent overcharging. At low charge levels the discharge power is reduced to
counteract undercharging.
Temperature of the circuit breakers: The circuit breakers in the system are designed
▪
for a certain continuous current. If this continuous load is exceeded, the temperature of
the circuit-breaker rises sharply. Above a certain limit temperature, the performance of
the system is reduced.
The power reduction in relation to the respective characteristic variable is linear between the
warning threshold and the threshold of the standard error. The maximum of the respective
restriction then determines the actual performance of the battery. The respective parameters
and limit values can be taken from the parameter list in the appendix.
During the charging process the battery automatically regulates the charging current of the
charger via the CAN interface - if this option is available. Thus the battery always remains within
the current capacity.
In the discharging process this specification must be implemented via the inverter. If this is not
possible, the battery warns the user of a critical situation via a signal generator and the user has
the possibility to leave this state by reducing the power.
As soon as a fatal error limit is reached, the battery disconnects from the application via the
circuit breaker to protect itself.

6.4.2 Acoustic signaler

This signal generator warns the user of critical situations. A distinction is made between an
interrupted and a continuous signal tone. If the signal tone is interrupted, the user must reduce
the load. If the signal tone is continuous, no further load is allowed.
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