Code 27354: F_DP: %1 communication, conn ection %2 reports SFC%3 error %4
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical F_DP: %1 communication, conn ection %2 reports SFC%3 error %4 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
Parameters: %1 = Type of communication %2 = Name or DP_DP_ID of the communication relationship %3 = SFC block number %4 = Error code Definitions: The F_DP communication with the external communi cation partner is disturbed. The PLC reports an error when trying to access via the parameterized interface. The communication type is displayed in %1: %1 = F_SENDDP %1 = F_RECVDP The name or the DP_DP_ID (identifier) of the SPL connection is displayed in %2. The PLC block that detected an error is displayed in %3. The detected cause of the er ror is displayed in %4. This alarm can be masked with MD $MN_SAFE_DIAGNOSIS_MASK, bit 2 = 1. Reaction: Alarm display. Remedy: Check the PROFIBUS communication and the communication partner Check the parameterized, logical bas ic address in $MN_SAFE_SDP/RDP_LADDR. Program Continuation: Clear alarm with the RESET key. Restart part program
Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINUMERIK 840D CNC Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 27354 on the SINUMERIK 840D CNC 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: 4014 Siemens SINUMERIK 840D CNC codes.
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