Troubleshooting Simatic PDM 8.0 SP2 with Rosemount 3051C 8732E

Problem Overview

When commissioning a PROFIBUS PA segment that combines Siemens field instruments with Rosemount 3051C pressure transmitters and 8732E magnetic flowmeters, two distinct failure modes appear in SIMATIC PDM 8.0 SP2 Update 2 against STEP 7 V5.5 SP3 that are not present on healthy reference devices (Siemens SIPART PS2 electro-pneumatic positioners and Endress+Hauser Prosonic ultrasonic level transmitters):

1. 3051C Coplanar. The device appears in HW Config and in PDM Life List, the PA address and tag can be assigned, but Upload to PG aborts with the dialog OM: Some parameters were not loaded. A subsequent Download to Device drops the device off the cyclic bus, and only a Factory Reset performed from PDM (with the device still reachable on the segment) restores communication.
2. 8732E Magnetic Flow Transmitter. The device cannot be inserted in HW Config at all. PDM rejects the catalog entry with a DD compilation error for both device type entries Rosemount PA Stand Alone and Rosemount PA Step7.

The same physical PROFIBUS PA segment continues to operate correctly with the SIPART PS2 and the Prosonic. The failures are isolated to Rosemount-manufactured PROFIBUS PA device descriptions and disappear once the EDD/GSD fileset is updated to a revision that matches the firmware of the field device.

Affected Components and Software Versions

Reference the official 3051C product specification for body code, range, and protocol details in Rosemount 3051 Pressure Transmitter Product Data Sheet.

Symptom Matrix

Root Cause Analysis

The root cause for both failure modes is a mismatch between the EDD revision bundled with the SIMATIC PDM Device Library and the EDD revision required by the device firmware installed on the 3051C and 8732E transmitters shipped from the factory. Two specific failure modes apply.

1. DD revision mismatch on the 8732E

SIMATIC PDM uses the EDD (Electronic Device Description) to build a parameter tree for the device. The catalog entries Rosemount PA Stand Alone and Rosemount PA Step7 reference EDD binaries whose declared revision does not match the protocol implementation in the device firmware. The Device Integration Manager cannot build a valid DDL (Device Description Language) parse tree, raises a DD compilation error during the catalog build, and refuses to expose the device type in HW Config.

2. Object Manager parameter load failure on the 3051C

When the EDD partially compiles against a device whose firmware exposes additional slots or modified parameter blocks, the SIMATIC PDM Object Manager cannot resolve every parameter block to a valid slot/index pair. The Upload to PG operation terminates partway through, producing the dialog OM: Some parameters were not loaded. A subsequent Download to Device applies only the parameters that PDM can resolve, leaving configuration slots required by the current firmware in an undefined state. The 3051C firmware treats the partially-written configuration as a fail-safe condition and drops cyclic communication.

Rosemount (Emerson) maintains its own EDD library and updates it independently of the Siemens PDM Device Library DVD. The 2015 Siemens PDM Device Library DVD did not yet include Rosemount EDD revisions aligned to current 3051C/8732E firmware. Vendor-specific GSD files are distributed through the same channel; mismatches in GSD revision manifest either as a hardware rejection at GSD install time or as a silent acceptance that leaves the DD catalog stale.

PROFIBUS PA Context

PROFIBUS PA (IEC 61158 / IEC 61784) operates at 31.25 kbit/s over a single twisted pair that also carries bus power. Each device is described by two files:

• GSD (General Station Description) - consumed by HW Config to draw the device in the segment view, define slot count, and declare diagnostic behavior. GSD revision is checked at install time.
• EDD (Electronic Device Description) - consumed by PDM to render the parameter tree, online dialogs, calibration wizards, and methods. EDD revision is checked at runtime.

Default cyclic cycle time for PROFIBUS PA on a Siemens DP/PA Link is 30 ms per device plus DP cycle overhead. The default slot map for a Profile 3.0 instrument is:

If the EDD catalog cannot resolve a slot/index pair (the symptom behind the 3051C OM error), PDM silently drops that block from the parameter tree and the upload compare dialog reports Not loaded for the missing block.

Prerequisites

• Local administrator rights on the engineering station (GSD install, DD integration, and bitmap replacement all require write access to C:\Program Files (x86)\Siemens\...).
• STEP 7 V5.5 SP3 (or later) with the current hotfix installed.
• SIMATIC PDM V8.0 SP2 with the latest cumulative update installed.
• Empty USB key or shared folder to receive the EDD/GSD bundle from the vendor.
• Known PROFIBUS PA segment address range and segment coupler type (DP/PA Link, Y-Link, or third-party).
• Rosemount 3051C firmware revision, 8732E firmware revision, and serial numbers for every transmitter on the segment.
• A backup of the current PDM catalog (export via Device Integration Manager > Export Catalog) so the engineer can roll back if a vendor bundle destabilises the catalog.

Resolution Procedure - 8732E Magnetic Flow Transmitter

The corrective bundle for the 8732E is the file 8732E_PA_DD_Rev1-27.zip supplied by Emerson-Rosemount-Micro Motion product support for the firmware revision of your 8732E. The bundle contains an updated GSD plus the matching DDs. Follow the sequence below exactly; partial installs leave the catalog in an inconsistent state.

Step 1 - Install the new GSD

1. Close HW Config and the SIMATIC Manager.
2. From STEP 7, choose Options > Install GSD File....
3. Browse to the unzipped GSD file and confirm.
4. If a GSD is already registered, HW Config warns that an earlier revision-4 GSD is present. Accept the replacement to overwrite the stale entry.

Step 2 - Integrate the DD via Device Integration Manager

1. Open Start > SIMATIC PDM > Device Integration Manager.
2. Add a new device integration source pointing at the unzipped folder containing the DD binary. Do not point the integration source at the .zip file itself; the catalog build fails on compressed sources on some Windows builds.
3. Locate the entry labelled 8732E Magnetic... in the device tree and click Integrate.
4. Wait for the catalog rebuild to complete. A successful integration adds a new entry under:
   Devices\PROFIBUS PA\Sensors\Flow\Rosemount\8732E Magnetic Flow DD Rev 2

Step 3 - Bind the device in HW Config

1. Reopen HW Config.
2. Drag the 8732E PROFIBUS PA device from the catalog onto the PA segment.
3. Open the device object properties, set the PA address (default 3 - 126 for non-master), and confirm the slot assignment matches the project default.
4. Compile and download HW Config to the S7-400H AS.

Resolution Procedure - 3051C Coplanar Pressure Transmitter

Apply the same workflow: obtain the EDD bundle from Emerson-Rosemount support for the firmware revision of your 3051C Coplanar unit (DP, GP, or AP body code). Install the GSD first, then integrate the DD with Device Integration Manager. The OM upload error disappears once the catalog revision matches the device firmware, and Download no longer drops the device.

Critical: Do not Download before Upload is clean

Recommended Upload-Download Workflow

1. Right-click the device in PDM and select Upload to PG/PC....
2. Confirm the resulting compare dialog shows all parameter groups marked Identical or Different (PG <- Device). No entry should display Not loaded.
3. If any group shows Not loaded, stop. Reinstall the EDD bundle, restart PDM, and retry.
4. Once the upload is clean, open Download to Device..., review the parameter compare dialog, and uncheck any group you do not intend to overwrite.
5. After Download completes, verify cyclic process values in a STEP 7 VAT table or in WinCC tag list.

BMP Bitmap Fix for HW Config Display

The Rosemount-supplied archive ships with a bitmap that is only 19 pixels wide, causing the device icon to render as a thin vertical sliver in HW Config. Standard Rosemount device bitmaps in STEP 7 are 70 pixels wide. Restore a properly sized bitmap by either:

• Copying a backup RFD0C15.bmp into C:\Program Files (x86)\Siemens\STEP7\S7DATA\NSBMP, or
• Opening the defective bitmap in any image editor and resizing the canvas to 70 px wide while preserving aspect ratio.

Close and restart HW Config to apply. This is cosmetic only; it does not affect communication or parameterization.

Verification Procedure

1. In PDM Life List, confirm the device appears with the correct PA address, manufacturer ID (0x56 for Rosemount), and tag.
2. Open the device in PDM, run Upload to PG, and confirm no OM: Some parameters were not loaded entries appear.
3. Open a STEP 7 VAT table or WinCC tag list and confirm cyclic process values update at the configured PA cycle time.
4. Trigger a diagnostic interrupt (force a sensor break or over-range) and confirm PDM receives the diagnostic event under Diagnostics > Device Diagnostics.
5. Run a Factory Reset dry-run with calibration values backed up to confirm PDM can write configuration parameters cleanly.
6. Compare the device firmware revision printed in the device object properties against the EDD revision in the SIMATIC PDM Device Catalog Manager. They must match.

Field-Recovery Procedure for a Bricked 3051C

If a Download was issued against a mismatched EDD and the 3051C dropped the bus:

1. Verify the device is still reachable on the segment via PDM Life List. The cyclic slot may be gone but the device should still respond to acyclic requests.
2. Open the device in PDM and select Device > Factory Reset.
3. Confirm the reset. The device reboots and returns to its out-of-box state.
4. Reapply configuration from a known-good parameter backup, using the Upload-Download workflow above.

If the device is unreachable even to PDM, use the local HMI module to perform the Factory Reset, then return to the workflow above once communication is restored.

Fallback Strategies

If the Emerson-supplied bundle still fails to integrate, fall back to the following options:

• Universal EDD. SIMATIC PDM ships generic universal / unified EDD libraries aligned to PROFIBUS PA Profile 3.0x. They expose a reduced parameter set but reliably communicate with most PA devices.
• Similar-but-not-exact EDD. A previous-generation Rosemount EDD often reads a subset of parameters from a current device. Upload works; Download is restricted to the parameters the EDD understands.
• Vendor handhelds. Emerson 475/375 field communicators speak the same PROFIBUS PA / FOUNDATION Fieldbus H1 protocol. Use them for field commissioning and leave PDM in monitor-only mode.
• AMS Device Manager. If the plant standardises on Emerson AMS, use it for full Rosemount configuration; PDM then reads process variables only and never writes configuration to the device.

Preventive Measures

• Record the device firmware revision on every transmitter during receiving inspection. The firmware revision is the single most important data point when requesting EDD bundles from Emerson.
• Maintain a local EDD/GSD repository keyed by manufacturer, model, and firmware revision. Tag each entry with the PDM version that last integrated it cleanly.
• Subscribe to Siemens Product Support notifications for the PDM Device Library DVD to catch EDD rollups when they ship.
• Establish a controlled change procedure: any new device firmware revision triggers an EDD compatibility check before commissioning is approved.
• Restrict Download to Device rights in PDM user management to engineers who have completed the Upload-clean verification step.

Diagnostics Quick Reference