9.5.2 Error Reactions of the Frequency Converter
If an error happens in running state, the frequency converter has to perform a
suitable error reaction. For general errors, the frequency converter will free-
wheel to stop. Some errors may be associated with special error reaction (e.g.
communication error), which are configurable. If a configurable error reaction is
set to "ignore error", then the error is neither displayed nor stored in the error
memory.
9.5.3 Clearing an Error Message
An error message can be cleared by the following actions:
● Press the STOP button.
● Activate the digital I/O terminal configured as "external error reset".
All other buttons or run commands from external sources are ignor-
ed before the error is reset. After reset, the display returns to the
state before the error occurred.
9.5.4 Error Memory
Several diagnostic messages of errors are written to the error memory. 3 recent
errors are stored in E4.20~E4.22. The latest error is always stored in E4.20 , and
the previous error codes are shifted one place back in the FIFO. The oldest error
(value of E4.22 before the new error occurred) will be shifted out of the FIFO
and lost. System status at the latest error are recorded in E4.30~E4.35.
9.5.5 Automatic Error Reset
An automatic error reset mechanism can be configured by setting E4.15 to a
non-zero value. If an error occurs, the normal error reaction and diagnosis is per-
formed as described above. After the frequency converter has stopped the PWM
output, the system will remain in idle mode for the delay time [E4.16]. Then the
error will be automatically reset and a run command will be generated to restart
the frequency converter. This sequence will be performed [E4.15] times in a
row. If the error still exists, the frequency converter remains in idle mode and
no longer performs automatic restart attempts. A manual reset is required to re-
sume the operation.
If a manual error reset (via STOP button or I/O terminal, see above) is requested
while the error is displayed during the automatic error reset sequence (during
the delay time between an error and the automatic restart attempt), the se-
quence will be interrupted and the error is reset. The frequency converter re-
mains in idle mode and no longer performs automatic restart attempts.
If the frequency converter is successfully restarted, then the number of auto-
matic restart attempts will be reset to E4.15.
Bosch Rexroth AG
Diagnosis
EFC 3600
136/259
DOK-RCON03-EFC-3600***-IT03-EN-P
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