FaultResolve
Back to Search Directory
Search this section

Search Siemens SINUMERIK 840D CNC

Search other Siemens SINUMERIK 840D CNC alarms without going back to the model list.

Search all database

Code 27351: F_DP: %1 communication, co nnection %2 reports error %3

Issue Description & Safety Warning

The Siemens SINUMERIK 840D CNC has triggered a critical F_DP: %1 communication, co nnection %2 reports error %3 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 SPL connection %3 = Error code Definitions: The F_DP communication with the external communi cation partner is disturbed, and the programmed error reaction is $A_FSDP_/FRDP_E RR_REAC = 2 (alarm, display only). The communication type is displayed in %1: %1 = F_SENDDP %1 = F_RECVDP The name or the DP_DP_ID (identifier) of the F_DP communication relationship is displayed in %2. The detected cause of the er ror is displayed in %3. %3 = SN: An error has been detected in the message sequence. %3 = CRC: A CRC error has been detected. %3 = TO: The parameterized co mmunication timeout was exceeded. All values stated for %3 can also be displayed in combination according to the fault profile. Reaction: Alarm display. 1. F_SENDDP/F_RECVDP: system variable $A_FSDP/FRDP_ERROR = TRUE 2. F_SENDDP/F_RECVDP: system variable $A_FSDP/FRDP_DIAG <> 0 3. F_RECVDP: system variable $A_FRDP_ACK_REQ = TRUE 4. F_RECVDP: Output of the substitute va lues defined in system variable $A_FRDP_SUBS Remedy: Check the PROFIBUS communication and the communication partner User acknowledgment via DB 18.FRDP_ACK_REI or NC-RESET Note to %3 = LS: Internal system er ror, can only be eliminated by PowerOn. Program Continuation: Alarm display showing cause of alarm disapp ears. No further operator action necessary.

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 27351 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.

Have a better solution?

Help the industrial community by sharing your repair experience for code 27351.

Manual conversion service

Need a searchable reference for more Siemens SINUMERIK 840D CNC manuals?

We structure equipment manuals into searchable code, title, cause, solution, safety note, and source-reference data. Send a PDF and example searched codes when you need public pages, private search, or structured exports.

Convert PDF fault-code charts and manuals into clean data.
Build public SEO pages or private internal search tools.
Prioritize updates around codes and manuals people search for.
Request manual conversion Email PDFs to manuals.errordb@gmail.com
Advertisement

Space reserved for Google AdSense / Industrial Affiliate Links

Monetization target for 2026

Related Siemens SINUMERIK 840D CNC Codes