Resolving Siemens MV420/MV440 PROFINET Errors E7FE0800

Problem Overview

The Siemens SIMATIC MV420 and MV440 UR are industrial code readers connected to S7-1200/S7-1500 controllers over PROFINET IO using the Ident Profile. In field deployments, two recurring error codes halt commissioning and force the operator into a permanent reset state:

• E7FE0800 — Timeout during INIT (60 seconds per TC3WG9). The reader reaches the BUSY state on a Reset_MV command, holds BUSY for exactly 60 s, and then returns the error. No subsequent command is accepted.
• E7FE0100 — In this status, only the Reset_Reader (WRITE-CONFIG) command is permitted. The reader refuses Trigger_Read, Read_MV, Change_Program, and any non-reset command until the previous failure is cleared.

Diagnostic indicators observed on the camera web interface:

• IP mode = Ident profile (correct).
• Integration tab connections = PROFINET IO (correct).
• TIA Portal project compiles without errors, all device icons are green.

Despite a clean TIA Portal compile, the reader still fails. The root cause lies in the Hardware Identifier (HWID) passed to the Ident Profile function blocks and the GSDML/Ident Profile revision used to instantiate the MV440 in the device configuration.

Affected Products, Firmware and Catalog Numbers

The following components are confirmed in the field-reported failure mode. Verify exact catalog strings on the device nameplate and in your TIA Portal Hardware Catalogue.

The Ident Profile is delivered in two shapes inside TIA Portal:

1. Ident Profile block library (FB 30050 IDENT, FB 30051 READ, FB 30052 WRITE, …) installed via the SIMATIC Ident package, which uses the conventional Ident Kanal_1 object.
2. Ident Profile embedded in the GSDML of the MV440 — when the MV440 is added from the TIA Hardware Catalogue as a 6GF3440-***** station, the device exposes a native Ident Profile slot; the Operating Mode parameter can be set to Ident Profile instead of the legacy block-based mode.

Root Cause Analysis

1. Wrong Hardware Identifier (most common)

The Ident Profile FBs require the Hardware Identifier of the MV reader itself, not the Hardware Identifier of the Ident Kanal_1 subslot. When the project was created using the legacy library channel, the user typically drags the Ident Kanal_1 HWID into the FB's HW_ID/LADDR input. After migrating to the GSDML-embedded Ident Profile, this HWID no longer corresponds to a live communication channel, and the FB cannot reach the reader. The reader therefore never receives the INIT sequence, the 60 s supervisory timer expires, and the reader transitions to the locked-down state that rejects all non-reset commands (E7FE0100).

2. Mismatched GSDML / Ident Profile revision

Field testing has shown that the Applications Example GSDML/Ident Profile pair bundled with the SIMATIC Ident examples may not match the firmware of the physical reader. With MV440 UR firmware V07.00.02_06, the example pair returned:

• E7FE0100 — locked to Reset_Reader only.
• E6FE0300 — Program selection not possible.
• E6FE0500 — Reset command is required.

Loading the catalog entry 6GF3440-***** from the live TIA Hardware Catalogue (matching the firmware) and switching the device's Operating Mode to Ident Profile resolved all three errors in field tests.

3. Technological Object pointing to stale HWID

When the MV device entry is changed in the device configuration, the associated Technological Object (TO) for the Ident Profile is not automatically re-bound. The TO must be opened and its Hardware Identifier assignment re-selected to the new MV station HWID. If this step is skipped, the TO continues to drive a non-existent channel and the same 60 s timeout recurs.

Reference: Error Code Map for the MV420/MV440 Ident Profile

The following codes are documented in the Siemens Ident Profile manuals and have been observed in the field. STATUS is reported in the 16-bit STATUS output parameter of the Ident FBs (FB 30050 family). The high byte E7FE indicates an Ident Profile internal error; E6FE indicates a command/state error.

For the general error handling pattern used by the SIMATIC Ident FBs (STATUS / SFCSTATUS evaluation), refer to the S7-1200/S7-1500 error message reference: Error messages (S7-1200, S7-1500) — STEP 7.

Diagnostic Workflow

1. Read STATUS and SFCSTATUS from the failing FB. The pattern E7FE08xx is always an INIT/handshake timeout family; the low byte tells you which sub-step timed out (00 = generic INIT, 01 = command queue, 02 = parameter handshake).
2. Verify the PROFINET link is online: open Online & Diagnostics → PROFINET diagnostics on the S7 CPU and confirm the MV station shows Connected / No fault.
3. Open the MV web interface (default address printed on the device) and confirm:
   • IP mode = Ident profile.
   • Integration = PROFINET IO.
   • Device name matches the PROFINET device name assigned in TIA Portal (case sensitive).
4. Cross-check the Hardware Identifier:
   • Open Project tree → PLC → Device configuration, click on the MV station header (not the Ident Kanal slot). The System constants → Hardware identifier value is what the FB must use.
   • In the FB instance DB or the call site, confirm the HW_ID/LADDR input matches the MV station HWID, not the Ident Kanal_1 subslot HWID.
5. Confirm Ident Profile version vs. firmware:
   • MV440 UR firmware (e.g., V07.00.02_06) is read on the camera's web UI under System → Device info.
   • Open the GSDML properties in TIA Portal: the Ident Profile revision must match the firmware's expected revision (v7.0 for V07.00.02_06).

Resolution Procedure

Step 1 — Re-create the MV station from the live TIA Hardware Catalogue

1. Open Devices & Networks.
2. Delete the existing MV station instance.
3. Search the Hardware Catalogue for 6GF3440- and drag the entry that matches the firmware loaded on the reader onto the PROFINET IO system.
4. Assign the same PROFINET device name and IP address as before.

Step 2 — Set the Operating Mode to Ident Profile

1. Select the MV station → Properties → Device configuration → Operating Mode.
2. Change the value from the default to Ident Profile.
3. Confirm the Ident Profile subslot appears under the MV station with its own input/output address areas.

Step 3 — Re-bind the Technological Object

1. Open the Technological Object that drives the Ident Profile FB.
2. Under Configuration → Hardware assignment, select the new MV station HWID (not Ident Kanal_1).
3. Compile (Hardware + Software) and download to the S7 CPU.

Step 4 — Replace the call site HWID

1. Open the OB/FB that calls the Ident Profile FB (e.g., FB_MvControl or the individual Reset / Read / Change_Program FBs).
2. At the HW_ID/LADDR input, replace the constant with the new MV station Hardware Identifier (or wire the system constant to it).
3. Recompile and download.

Step 5 — Cycle the reader

1. On the MV web UI, perform a Restart.
2. Wait for the reader to reach the idle state.
3. Trigger Reset_MV from the program. The BUSY signal should clear in well under 60 s, returning DONE without a STATUS error.

Inline SVGs: Topology and State Flow

PROFINET topology and Hardware Identifier routing

Reader state machine during a failed Reset_MV

Verification

1. STATUS = 0 on Reset_MV with DONE rising within 5 s. No E7FE08xx returned.
2. PROFINET diagnostics: MV station shows Connected / No fault, IO data exchange active.
3. Trigger_Read executes and returns the expected data length; STATUS = 0.
4. Change_Program loads a different program number and returns STATUS = 0 (this proves the Ident Profile state is fully functional, not only reset).
5. Online viewer on the FB instance DB shows HW_ID matching the MV station HWID, not Ident Kanal_1.

Field-Proven Best Practices

• Always match the Ident Profile revision to the reader firmware. When updating the MV440 firmware, re-import the GSDML/Ident Profile pair from the matching Siemens support entry and recompile.
• Avoid the legacy Ident Kanal_1 slot for new projects. Use the GSDML-embedded Ident Profile so the MV station and the Ident Profile are bound to the same HWID.
• Use system constants (HwID_MV440) at the FB call site instead of raw integer constants. This prevents drift when the device configuration is regenerated.
• Do not re-trigger a BUSY FB. Wait for DONE or ERROR. Re-triggering during BUSY is the fastest path to E7FE0800 and the locked E7FE0100 state.
• Document the PROFINET device name and IP in the project comments. The reader's Ident profile mode requires the device name to match exactly (case sensitive).

Alternate Platforms and Ident Profile Compatibility

The Ident Profile is also supported on third-party PROFINET IO controllers from non-Siemens vendors (e.g., Beckhoff TwinCAT, Phoenix Contact PLCnext, Bosch Rexroth IndraLogic). The same E7FE0800/E7FE0100 behavior will be observed if the wrong slot or subslot is addressed. When migrating between controllers, the HWID of the reader and its Ident Profile subslot must be re-mapped; the Ident Profile revision must match the reader firmware regardless of controller brand.

Related Siemens Support References

• SIMATIC Ident — Ident Profile and FB libraries (entry 103528928)
• SIMATIC MV440 UR — Applications Example, GSDML and Ident Profile (entry 109757269)
• Error messages (S7-1200, S7-1500) — STEP 7

Troubleshooting Matrix