Code F01640: PROFIsafe Driver Fault
Issue Description & Safety Warning
The Siemens SINAMICS G120 CU240S Drive has triggered a critical PROFIsafe Driver Fault alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Reaction: OFF 2 (OFF 3) Acknowledge: Quit fault eg. via DI2 Cause: An error has been detected with the PROFIsafe driver. - r0949 = 102: A parameterisation error occured on P1. The parameters received from the bus are not correct. Check PROFIsafe parameters. - r0949 = 103: A consecutive number error occured on P1. Current PROFIsafe message has a wrong sign of life. - r0949 = 104: A CRC error occured on P1. The PROFIsafe message checksum was incorrect. - r0949 = 105: A watchdog error occured on P1. PROFIsafe driver timed out. - r0949 = 106: Fail safe values are active on P1. - r0949 = 107: PROFIsafe default error on P1. - r0949 = 202: A parameterisation error occured on P2. The parameters received from the bus are not correct. Check PROFIsafe parameters. - r0949 = 203: A consecutive number error occured on P2. Current PROFIsafe message has a wrong sign of life. - r0949 = 204: A CRC error occured on P2. The PROFIsafe message checksum was incorrect. - r0949 = 205: A watchdog error occured on P2. PROFIsafe driver timed out. - r0949 = 206: Fail safe values are active on P2. - r0949 = 207: PROFIsafe default error on P2. - r0949 = 208: PROFIsafe configuration error on P2. The drive configuration does not match the configuration from the bus. Remedy: - Check all PROFIsafe settings (including your higher level failsafe control system). - Acknowledge PROFIsafe fault.
Source: SINAMICS G120 Control Units CU240S Faults and Alarms (Edition 05/2007)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINAMICS G120 CU240S Drive Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code F01640 on the SINAMICS G120 CU240S Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 108 Siemens SINAMICS G120 CU240S Drive codes.
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