14.4.27 Error 44 (rS-): Modbus Communication Error
Possible reason
Solution
Device connection problem
Check device communication connection
Communication target error
Check status of communication target
14.4.28 Error 45 (E.Par): Parameter Settings Invalid
Possible reason
Solution
Parameter settings are invalid after firmware update or extension
card removed
Contact with service
14.4.29 Error 46 (U.Par): Unknown Parameter Restore Error
Possible reason
Solution
Parameter backup could not restore a parameter which can not be
shown on the panel
Check with ConverterWorks or contact with service
14.4.30 Error 48 (idA-): Internal Communication Error
Possible reason
Solution
Internal error caused by communication between control boards
Contact with service
14.4.31 Error 49 (idP-): Internal Parameter Error
Possible reason
Solution
Internal error caused by parameter handling
Contact with service
14.4.32 Error 50 (idE-): Converter Internal Error
Possible reason
Solution
Internal error occurs
Contact with service
14.4.33 Error 51 (OCd-): Extension Card Internal Error
Possible reason
Solution
Extension card was successfully detected by the device at start-
up, but the communication failed afterwards
Contact with service
14.4.34 Error 52 (OCc): Extension Card PDOs Configuration Error
Possible reason
Solution
Internal communication error between communication card and
converter control board
Contact with service
DOK-SYTROX-DRN5020****-IT05-EN-P
Bosch Rexroth AG
131/143
Frequency-Controlled Pump Drive System Sytronix DRn 5020
Troubleshooting